Switching the metabolism to fat burning: what really happens
The key points at a glance
The body is not switched to fat burning. Every waking minute, it burns fat and carbohydrates simultaneously; what changes is exclusively the ratio between the two. This ratio is shifted by two factors: how hard you exercise and how many carbohydrates you consume. There is no switch that clicks into place.
This distinction sounds like nitpicking, but it is the whole difference. Anyone looking for a state waits for an event that never occurs. Anyone looking for a shift can describe it, influence it, and even measure it in the laboratory. This article shows which figures are supported by evidence, which institutions cite them, and in what year.
First, you will learn how to recognize the simultaneous use of both fuels, followed by how exercise intensity shifts the ratio. Then come the four approaches marketed online as a metabolic switch, the role of carbohydrates, a sober assessment of ketosis, and common misconceptions. The final section covers the difference between fat oxidation and fat loss, what you can observe yourself, and the limitations.
What to expect in this article
1. Why there is no switch to flip
2. How exercise intensity shifts the ratio
3. Four approaches marketed as a metabolic switch
4. What carbohydrate intake actually controls
5. Ketosis: what it is and what it is not
6. Four statements from the internet and what remains of them
7. Why fat burning and fat loss are two different things
8. What genetics explains at this point
9. Four steps to see your own shift
10. What a saliva sample says about your metabolism
11. Who an analysis makes sense for—and who it does not
12. Limitations: what no one here can measure
13. What matters in the end
Frequently asked questions
Sources
Why there is no switch to flip
The search query assumes a process that does not actually exist. It sounds like a device with two settings: one for sugar, one for fat, and at some point the lever clicks into the correct position. Terms such as turbo mode, fat-burning heart rate, or metabolism booster fit this image.
Your metabolism works differently. It burns both fuels simultaneously, always—not alternately, but in parallel. What changes is the share each fuel currently contributes to energy expenditure.
This is not a matter of interpretation but a measurable quantity. It is called the respiratory quotient, has been determined in performance diagnostics for decades, and answers the question of the mixture with a single number.
Key takeaway
Fat and carbohydrates are burned simultaneously, not alternately. Nothing switches over—the ratio shifts, driven by exercise intensity and carbohydrate intake.
What the respiratory quotient reveals about the mixture
The respiratory quotient compares exhaled carbon dioxide with inhaled oxygen. Because fat and carbohydrates require different amounts of oxygen during oxidation, this ratio reveals which fuel is currently predominant.
Patel and Bhardwaj describe the values in the National Library of Medicine’s StatPearls series (2023) as follows: With pure carbohydrate oxidation, the quotient is 1.0; with pure fat oxidation, it is 0.7. For a mixed diet, they give a value of 0.8.
That middle value is precisely the point. It is not a compromise between two states but the description of a single one: Both substrates are used side by side. A person whose respiratory quotient is 0.8 is neither in sugar mode nor fat mode. They are in both.
Why the image of a mode is so persistent
The image of a hybrid car with two tanks appears in many advice articles, and there is a reason it persists: It is easy to grasp and promises control. Anyone who assumes there is a switch believes in an action that changes everything.
The price of this picture is high. It turns a gradual transition into an event you wait for, and a shift of just a few percentage points into an all-or-nothing matter. Anyone who does not feel this moment considers themselves a failure, even though something measurable has long since shifted.
There is a more honest question than “When has my metabolism switched?” It is: In which direction has my ratio shifted, and how can I recognize it? This question has an answer. The other does not.
How exercise intensity shifts the ratio
The most powerful lever affecting the ratio is not the plate but the intensity of the exercise. The harder you work, the greater the share of carbohydrates in energy expenditure. The easier the effort, the greater the share of fat.
This gave rise to the gym wisdom of the “fat-burning heart rate” in the 1990s: If you run slowly, you burn a higher percentage of fat, so you should run slowly. The first part of the sentence is correct. The second is a fallacy, and sports medicine disproved it using the very same curve from which it originated.
Documented source
“At low exercise intensity, fat metabolism accounts for the highest percentage of energy expenditure. However, energy expenditure is low, resulting in a relatively low fat oxidation rate.”
Scharhag-Rosenberger F, Standards of Sports Medicine: Fat Metabolism Training
Deutsche Zeitschrift für Sportmedizin, volume 63, issue 12, pages 357–359, 2012
This one sentence contains two numbers that are constantly confused. The percentage share indicates which fuel is currently predominant. The fat oxidation rate indicates how much fat is actually burned per minute. A high share of a small turnover remains a small amount.
The share and the amount are two different numbers
Think of two taps running into the same bucket. One supplies fat, the other carbohydrates. While sitting, hardly anything flows overall, and of the little that does, the larger share comes from the fat tap. When running fast, a lot flows, and the larger share comes from the other tap. Whether more fat ends up in the bucket is determined not by the share, but by the amount.
Therefore, the advice to train especially slowly for fat burning is not tenable in this form. It optimizes the wrong one of the two numbers.
Where fat burning peaks
There is an intensity at which the absolute fat oxidation rate is highest. It is neither at the very low nor the very high end, but in a moderate range, and it varies from person to person.
In the Deutsche Zeitschrift für Sportmedizin (2012), Scharhag-Rosenberger gives approximately 65 percent of maximal oxygen uptake for endurance-trained people and around 50 percent for untrained people as a guideline, with the explicit addition that this value can vary considerably between individuals.
These percentages refer to maximal oxygen uptake, not maximal heart rate. Anyone equating them with an online heart-rate formula is calculating the wrong metric. Your individual range can be determined through spiroergometry at a sports medicine facility.
More interesting than the point itself is that it can shift. The same review reports increases of up to 0.44 grams per minute in the fat oxidation rate at a defined workload for endurance training, which corresponds to around 90 percent (Scharhag-Rosenberger, 2012). This is the documented form of what advice articles call a “metabolic switch”: not a new operating mode, but a trained shift in the same curve.
Four approaches marketed as a metabolic switch
Anyone searching for this article’s keyword ends up with the same four recommendations. All four really do shift something. They just do not shift the same thing, and they do not answer the same question.
The table compares them using four identical criteria. The final row deliberately states what each approach does not achieve, because that exact row is missing from most comparisons.
| Criterion | Endurance training at moderate intensity | Reduce carbohydrates | Ketogenic diet | Training without a prior meal |
|---|---|---|---|---|
| What shifts | The fat oxidation rate at the same workload, by up to 0.44 g/min (Scharhag-Rosenberger, 2012) | The proportion of fat in energy expenditure increases because less glucose is available | The liver produces ketone bodies as an additional fuel | The proportion of fat during this one session |
| Evidence | Described in sports medicine, with a specific figure and order of magnitude | Physiologically undisputed; the DGE specifies a guideline value of more than 50% of energy from carbohydrates (2011) | Recognized as a guideline-supported therapy only for epilepsy (StatPearls, NLM, 2025) | There is no reliable figure here for the long-term effect on body composition |
| How you notice it | The same pace feels easier over the course of weeks, with a lower heart rate | Less pronounced hunger and fatigue peaks after meals | At first, more likely side effects than performance improvements | A reduced capacity to perform during high-intensity sessions |
| What it does not do | It does not create an energy deficit on its own | It does not replace the nutrient supply that must remain ensured when falling below the guideline value | It is not a free pass for unlimited energy intake and is not free of side effects | It says nothing about the rest of the day |
The four columns are not mutually exclusive. They are simply treated in most texts as though one were right and the other three wrong. In reality, they shift things at different points, and anyone who pits them against one another loses sight of which shift they are actually seeking.
What actually controls carbohydrate intake
The second lever for adjusting the ratio is on the plate. It does not work through a lever, but through availability: When little glucose is available, the body meets a larger share of its needs from fatty acids.
How many carbohydrates are sensible in this context is not a matter of taste. In its 2011 position paper on guideline values for energy intake from carbohydrates and fat, the German Nutrition Society specifies a guideline value of more than 50 percent of energy intake from carbohydrates for a balanced mixed diet. For fat, the guideline value is 30 percent, and 35 percent for physically active people.
What falling below the guideline value requires
The DGE does not prohibit falling below the guideline value. It attaches a condition to it, and that condition is the actual substance of the position: The guideline value may be undercut if an adequate supply of all essential nutrients is ensured, namely vitamins, minerals, and certain polyunsaturated fatty acids (DGE, 2011).
The same paper contains a statement that softens the debate over the one correct diet: Worldwide comparative studies show that human metabolism can meet its energy needs through a wide variety of diets and nutrient ratios (DGE, 2011). In this respect, the body is considerably more flexible than informational literature portrays it.
In the same context, the DGE points out that reducing carbohydrates can have undesirable effects if the reduction is offset by increased consumption of meat and meat products (2011). Anyone who eats less bread and more sausage instead has shifted the nutrient balance and reduced the overall quality.
The statement about insulin that nearly every informational article oversimplifies
Nearly every text on this subject says that insulin blocks fat burning and is therefore the opponent. The core of this statement is correct: insulin inhibits the release of fatty acids from adipose tissue and promotes their storage. After a carbohydrate-rich meal, the balance therefore shifts toward glucose.
The statement is oversimplified in two respects. First, insulin is not a doorkeeper that slams the door shut, but a regulator that opens it more or less widely. Second, insulin also rises after protein-rich meals, not only after meals containing carbohydrates. Anyone who portrays insulin as the sole enemy must explain why a steak should then be harmless.
In practical terms, the intervals between meals influence the balance, and anyone who eats constantly keeps the regulator permanently set to one side. This observation does not imply a ban on individual foods, but rather raises a question about the structure of the day.
Ketosis: what it is and what it is not
Ketosis is the state most often equated in informational articles with the sought-after switch. It is indeed the closest thing to a recognizable change in state, and yet it is still something different from the promised transformation.
When very little carbohydrate is available over an extended period, the liver produces so-called ketone bodies from fatty acids. They serve as fuel for tissues that would otherwise preferentially use glucose, including the brain. These ketone bodies are why a very-low-carbohydrate diet feels different from one that is merely somewhat reduced in carbohydrates.
What those amounts entail
The proportions are significantly stricter than many people expect. In the StatPearls series of the National Library of Medicine (2025), Daley and colleagues describe the classic ketogenic diet as providing approximately 90 percent of its energy from fat, around 6 percent from protein, and 4 percent from carbohydrates. The less restrictive, very-low-carbohydrate variant limits carbohydrate intake to 20 to 50 grams per day.
Twenty to fifty grams is little. A medium-sized banana is already in that range. Anyone who thinks that leaving out pasta and bread settles the matter underestimates what this diet means in everyday life.
What the evidence supports—and what it does not
When it comes to its use, the evidence is unusually clear. Daley and colleagues state that although the ketogenic diet is used for various metabolic and neurological conditions, epilepsy remains its only generally recognized, guideline-supported indication (StatPearls, National Library of Medicine, 2025).
The same source lists a range of possible adverse effects, including nausea, vomiting, constipation, diarrhea, bad breath, headaches, fatigue, and dizziness, as well as changes in blood lipids, fatty liver, and kidney stones. This list belongs in any honest account because it is missing from most advice articles.
Anyone considering a very-low-carbohydrate diet should therefore discuss it beforehand with a medical or nutritional therapy professional. This applies especially to people with existing medical conditions, during pregnancy, and when taking medications that affect blood sugar.
Chapter at a glance
Ketosis describes the production of ketone bodies in the liver when very few carbohydrates have been available for an extended period. The classic ketogenic diet derives around 90 percent of its energy from fat and 4 percent from carbohydrates, while the very-low-carbohydrate version limits carbohydrates to 20 to 50 grams per day (StatPearls, National Library of Medicine, 2025). As a therapy, only epilepsy is recognized by clinical guidelines as an established indication, and the list of possible adverse effects is long. Ketosis is therefore a describable metabolic state, not a seal of quality for a dietary pattern.
Four statements from the internet and what remains of them
You encounter the following four statements in almost every text on this search term. None of them is made up. Each draws the wrong conclusion from a correct observation, and that is precisely what makes them so persistent.
On the left is the commonly repeated statement; on the right is what can be supported by evidence, including the institution and year.
Checked against the evidence
Commonly claimed
“With the fat-burning heart rate, you burn the most fat.”
Documented
At low intensity, the percentage of fat used is highest, but energy expenditure is low, resulting in a low fat oxidation rate (Scharhag-Rosenberger, Deutsche Zeitschrift für Sportmedizin, 2012). Proportion and amount are two different numbers.
Commonly claimed
“As long as insulin is involved, there is no fat burning at all.”
Documented
The respiratory quotient is 0.8 on a mixed diet, placing it between the values for pure carbohydrate and pure fat burning (Patel and Bhardwaj, StatPearls, National Library of Medicine, 2023). Both substrates are used simultaneously; the ratio shifts.
Commonly claimed
“Without carbohydrates, the metabolism finally works properly.”
Documented
The German Nutrition Society gives a guideline of more than 50 percent of energy from carbohydrates for a balanced mixed diet and considers going below this level acceptable only if the supply of all essential nutrients remains assured (2011).
Commonly claimed
“After two weeks, the metabolism has adjusted.”
Documented
No institution has provided a figure for such a timeframe, which is why there is no number here. Instead, what has been described is an adaptation to endurance training: increases in the fat flux rate at a defined workload of up to 0.44 g/min, or about 90% (Scharhag-Rosenberger, German Journal of Sports Medicine, 2012). This is a shift, not a cutoff date.
What all four sentences have in common is the desire for an outcome that can be checked off. A date, a pulse, a number on a test strip. Physiology does not provide that, and anyone who promises it anyway is selling reassurance instead of information.
Why fat burning and fat loss are two different things
This is where most texts on the subject fall silent. A high fat oxidation rate means that a lot of fat is used as fuel. It does not mean that the fat stores are getting smaller.
Whether the amount of body fat changes is determined by the energy balance over longer periods. In its presentation on the causes of obesity, the Institute for Quality and Efficiency in Health Care states that excessive weight gain is the long-term consequence of an imbalanced energy balance (IQWiG, as of 2022).
A high fat oxidation rate means that a lot of fat is used as fuel. It does not mean that the fat stores are getting smaller.
How daily energy expenditure is composed
The same presentation by IQWiG (as of 2022) divides daily energy expenditure into three components: resting energy expenditure accounts for around 70 percent, activity-related energy expenditure for about 20 percent, and the processing of food for about 10 percent. Resting energy expenditure depends primarily on muscle mass.
This breakdown explains two things at once. It shows why a single workout moves less than the mental math would suggest. And it shows why strength training affects the largest of the three blocks indirectly, through muscle mass.
IQWiG illustrates how small shifts affect things over time with a calculation example: Just 50 extra kilocalories per day could theoretically mean about 2 kilograms of weight gain over a year (as of 2022). This is a model value, not a prediction for an individual person, but it puts the orders of magnitude into perspective.
What this means for your own expectations
Anyone who shifts the mix without changing the balance burns proportionally more fat and retains their fat stores. That sounds sobering. It is the most honest sentence that can be written about this search term.
The shift is still useful, just elsewhere: in your ability to cope with longer sessions, in the consistency of your energy throughout the day, and in how often you reach for the next snack. These are everyday measures, not numbers on a scale.
What predisposition explains here
Two people follow the same recommendation and get to different places. This observation is at the beginning of almost every search for one's own metabolism, and it is justified.
IQWiG takes a cautious view of the role of hereditary factors. According to it, some genes influence feelings of hunger or satiety, while others affect body weight more indirectly, and genetic factors also play a role in how completely the body utilizes nutrients (IQWiG, as of 2022).
Read this paragraph twice. It talks about hunger, satiety, and nutrient utilization. It does not talk about a gene for fat burning, nor does it name a percentage by which a particular variant shifts fat oxidation.
What a predisposition is and what it is not
A genetic predisposition describes a tendency, not a compulsion. It says something about how your body is more likely to react to certain stimuli, and it says nothing about where you will be in six months.
The objection is justified: If your predisposition does not change, why know it? Nevertheless, something else is decisive. It does not change, which is why one assessment is enough for your entire life, and it serves as a starting point for making a selection rather than as proof.
At this point, we are not selling you a success forecast, but rather a way of putting things into perspective. What you do with it is up to you.
Four steps to see your own shift
The question of changing over is impossible to answer. The question of shifting is not—and can be answered without a laboratory. The following four steps provide observations that apply to you personally and that you can compare against yourself.
Choose a fixed reference route
The same route, the same pace, the same day of the week. Without a fixed route, you will later be comparing apples and oranges.
Record heart rate and exertion
Average heart rate and your perceived exertion on a scale from one to ten. Two numbers per session, nothing more.
Record the hours after meals
When does tiredness occur, and when does hunger occur? These two points in time shift earlier than any number on the scale.
Compare after six to eight weeks
Against your own baseline values, not against someone else’s target values. What has changed is recorded in your notes.
The order is not accidental. If you make changes first and observe afterward, you have no baseline and cannot attribute anything later. If you record everything for two weeks first and then change something, you can see the shift in your own numbers.
A lower heart rate at the same pace is not proof of changed fat oxidation. It is a sign of cardiovascular adaptation, and this section makes no stronger claim.
What a saliva sample says about your metabolism
Two DNA analyses by mybody®x (MYBODY Lab GmbH) focus on predispositions. You collect the sample at home using a cheek swab, and because genetic information does not change, this type of test only needs to be done once.
First, the limitation that applies to both and is especially significant for this topic. Both product pages were checked on 27 August 2026: Neither mentions a report on fat burning, fat oxidation rate, or respiratory quotient. Anyone expecting to learn from the results how much fat they burn at a particular heart rate is expecting something these tests do not provide. That figure comes from spiroergometry, not saliva.
What both provide is something different: a description of predispositions as a starting point for making your own choices. What they do not provide is stated on the cards below in the same font size as the rest.
DNA analysis from a saliva sample
DNA Metabolism Analysis | incl. 28-day plan & recipe book
Describes genetic factors related to nutrition and provides a food book with 60 recipe ideas tailored to the results. What the analysis does not provide: The product page contains no section on fat burning, fat oxidation rate, or respiratory quotient and explicitly presents itself as inspiration for everyday life. It does not measure current values, provide a diagnosis, or say anything about your energy balance today.
Laboratory analysis 15–25 business days after sample receipt
accessed 27 August 2026
DNA analysis from a saliva sample
Fitness | VITALITY DNA Test
According to the product page, it analyzes more than 100 gene variants and provides over 32 reports covering exercise, nutrition, and recovery. What the test does not do: The product page explicitly frames its recommendations without medical claims and does not mention a report on fat burning or training intensity with the highest fat flux. It does not replace performance diagnostics and does not measure current values.
Laboratory analysis 15–25 business days after sample receipt
accessed 27 August 2026
Both analyses use SNP genotyping, that is, an examination of individual gene variants, rather than sequencing the entire genome. This is a difference in scope that advertising copy often obscures.
Who an analysis is worthwhile for—and who it is not
Because both cards above explicitly state what they do not cover, an honest countercheck belongs here. It points in both directions.
Worthwhile for you if …
you want to have your predispositions described once and understand that this result will not change.
you already train regularly and want to supplement your choice of nutrition and training methods with another point of reference.
you prefer an analysis in text form that is easy to read in everyday life rather than a table with reference ranges.
Probably not if …
you want your fat-burning rate or optimal training intensity expressed in numbers. Spiroergometry is the appropriate method for this, not a saliva sample.
you want to know where your current values stand. A DNA analysis shows your predisposition, not your current state.
you hope this will provide a statement about your future weight trajectory. Neither analysis can make such a prediction.
you currently want to have symptoms evaluated. In that case, the first step is to see a doctor.
Limitations: what no one here can measure
The first limitation is inherent to the subject itself. The state being sought does not exist as a state. There is no procedure that tells you your metabolism has now switched over, because the category does not exist.
The second limitation concerns transferability. The values from sports medicine—around 65 percent of maximum oxygen uptake in endurance-trained individuals and roughly 50 percent in untrained individuals (Scharhag-Rosenberger, 2012)—are group averages. The same source explicitly points out that the individual value may differ considerably.
The third boundary lies between predisposition and state. A DNA analysis describes predispositions and never changes. A blood test describes a status and changes over months. Anyone who confuses the two expects one type of sample to show what only the other can reveal.
And one boundary regarding this article: The information comes from published sources that include an institution and year. It does not replace individual advice, nor is it a recommendation to change an existing treatment.
What matters in the end
If you take away one action from this article, let it be this: Set a fixed reference route and record two numbers for every session for six weeks—your average heart rate and your perceived exertion. Then compare them with your own baseline values.
The reason is unremarkable. These two numbers are the only things you can measure yourself that actually say something about an adaptation. Everything else offered in this field as a progress indicator is either a snapshot or a promise.
The question at the beginning was how to switch the metabolism to fat burning. The most honest answer is: you cannot, because it was never switched off. What you can shift is the ratio, and that is less than the search query hopes. At the same time, it is the only thing here that can be substantiated.
Frequently asked questions
How long does it take to switch the metabolism to fat burning?
The question cannot be answered in this form because the supposed switch does not occur as an event. The body burns fat and carbohydrates simultaneously, as indicated by the respiratory quotient, which with a mixed diet falls between the values for pure fat and pure carbohydrate oxidation (Patel and Bhardwaj, StatPearls, National Library of Medicine, 2023). What has instead been described is an adaptation to endurance training, with increases in the fat oxidation rate at a defined workload of up to 0.44 grams per minute (Scharhag-Rosenberger, German Journal of Sports Medicine, 2012). None of these sources gives a timeframe in days or weeks, so none is provided here.
Is there a fat-burning heart rate at which I should train?
There is an intensity at which the absolute fat oxidation rate is highest, and it is usually misunderstood. As a guideline, the German Journal of Sports Medicine gives approximately 65 percent of maximal oxygen uptake for endurance-trained individuals and around 50 percent for untrained individuals, explicitly noting substantial individual variation (Scharhag-Rosenberger, 2012). This refers to oxygen uptake, not heart rate. The classic advice to run especially slowly also optimizes the percentage rather than the actual amount burned.
Do I have to give up carbohydrates to burn fat?
No. The German Nutrition Society recommends that a balanced mixed diet derive more than 50 percent of energy intake from carbohydrates and 30 percent from fat, or 35 percent for physically active people (2011). It considers going below this level acceptable if the supply of all essential nutrients is ensured. In the same paper, it notes that reducing carbohydrates may have adverse effects if compensated for by eating more meat and meat products.
Is ketosis the state I should aim for?
Ketosis is a describable metabolic state, not a seal of approval. The classic ketogenic diet derives around 90 percent of its energy from fat and about 4 percent from carbohydrates, while the very-low-carbohydrate version limits carbohydrates to 20 to 50 grams per day (Daley et al., StatPearls, National Library of Medicine, 2025). The same source states that epilepsy remains the only generally recognized, guideline-supported indication and lists a number of possible adverse effects. Anyone considering this diet should discuss it beforehand with a medical or nutritional therapy professional.
Can a DNA test show how well I burn fat?
No. The product pages for the DNA Metabolism Analysis and the Fitness | As of August 27, 2026, VITALITY DNA Tests do not include a chapter on fat burning, fat oxidation rate, or respiratory quotient. A DNA analysis describes predispositions that do not change, not current values. How much fat you burn during a particular exertion is determined by spiroergometry, meaning the measurement of respiratory gases during exercise. IQWiG takes a cautious view of the genetic contribution and mentions hunger and satiety as well as nutrient utilization, not fat burning (as of 2022).
Next step
A description instead of a guess
If you want your predispositions related to nutrition described, the DNA Metabolism Analysis is the starting point. If you are more interested in exercise and recovery, the Fitness | VITALITY DNA Test as well. Both show predispositions, not current values, and neither replaces a medical evaluation.
DNA Metabolism Analysis Fitness | VITALITY DNA TestRead more
You might also be interested in
The classification of the factors that affect energy expenditure, if you are less interested in the mix than in the expenditure itself.
In case you want to know what methods are available and which question each of them answers.
Sources
- Scharhag-Rosenberger F: Sports Medicine Standards – Fat Metabolism Training. German Journal of Sports Medicine, Volume 63, Issue 12, Pages 357–359 (2012) – germanjournalsportsmedicine.com
- German Nutrition Society (DGE): Position Paper – Reference Values for Energy Intake from Carbohydrates and Fat (2011) – dge.de
- Institute for Quality and Efficiency in Health Care (IQWiG): Causes of Obesity (as of 2022) – gesundheitsinformation.de
- Patel H, Bhardwaj A: Physiology, Respiratory Quotient. StatPearls, National Library of Medicine (2023) – ncbi.nlm.nih.gov
The verbatim quotation concerning the percentage share of fat metabolism, the information on the intensity with the highest fat oxidation, and the figure of up to 0.44 grams per minute come from source [1]. The reference values for carbohydrates and fat, the condition for falling below them, and the note on meat and meat products are based on [2]. The breakdown of daily energy expenditure, the calculation example using 50 kilocalories, and the classification of the genetic contribution come from [3]; the respiratory quotient values come from [4]. The information on the ketogenic diet is from Daley SF, Masood W, Annamaraju P, and Khan Suheb MZ in the StatPearls series of the National Library of Medicine (2025); it is attributed in the running text with the authors, series, and year and is therefore not included in this list. Information on prices, reports, sample type, and laboratory comes from the mybody®x product pages, accessed on 08/27/2026; processing times follow the central specification for DNA tests. All sources were accessed and reviewed on 08/27/2026.
mybody®x Editorial & Expert Team
Nutritional science Exercise and performance physiology Genetics and SNP analysis Laboratory diagnostics
This article was created by the mybody®x editorial and expert team. The team combines nutritional science, exercise and performance physiology, and the analysis of genetic and laboratory diagnostic data. The people who contribute to it are listed on the authors page.
Published on 08/10/2025 · Last updated on 08/27/2026
The content is intended for general information and does not replace medical advice, diagnosis, or treatment. Reference ranges depend on the laboratory, method, and age—your test report always provides the authoritative information.
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