Iron-rich foods for iron deficiency: what really matters
ca. 25 Minuten
The key points
The foods richest in iron are liver, sesame, nuts, and dark bread. But what matters is not the iron content of a food, but how much of it reaches your body. The body makes better use of iron from animal sources than from plants, and vitamin C shifts this balance.
This article gives a figure, source, and year for every food. It separates two questions that are constantly confused online: how to meet your daily needs, and how to treat an existing deficiency. The second is not a matter for a meal plan.
First, you’ll read about what your body needs iron for. Next come the signs that call for a doctor’s visit, daily requirements in numbers, a table of iron content, three common misconceptions, and an example day. At the end, you’ll learn how to tell when food alone is no longer enough.
What to expect in this article
1. What your body needs iron for
2. When your symptoms are no longer a matter for the kitchen
3. How much iron you need each day
4. Why not all iron is the same
5. Which foods provide how much iron
6. What boosts absorption and what inhibits it
7. What a day with enough iron looks like in practice
8. How to tell when diet alone is not enough
9. How to find out where your iron levels stand
10. Who should get tested - and who should not
11. Limitations: what a blood test cannot do
12. What you can change starting tomorrow
Frequently asked questions
Sources
What your body needs iron for
Iron is a means of transport. It is found in the red pigment in blood and carries oxygen from the lungs to every single cell. If there is not enough, the supply chain gets thinner, and you notice it first where a lot of oxygen is needed: with concentration and endurance.
According to the Institute for Quality and Efficiency in Health Care (2023), the body needs iron, among other things, to produce hemoglobin, as well as for energy production and cell division. It is therefore not a niche nutrient for competitive athletes, but a basic building block.
Key takeaway
The iron content of a food says nothing about how much iron reaches the body. Between the plate and your blood levels is absorption in the intestine, which varies considerably depending on the source of the iron.
Why the body stores iron instead of using it up
Your body uses iron sparingly. Most of the iron released when red blood cells are broken down is reused. Losses occur mainly through bleeding, shed cells of the intestinal lining, and the skin.
That is why iron deficiency rarely develops in a single day. It develops over a longer period when intake remains below losses. When you notice it, you are seeing the result of many weeks, not the consequence of a single meal.
The storage marker is ferritin, and it changes earlier
Ferritin is the iron storage protein, while transferrin is its transport protein in the blood. Together, they show how well the stores are filled (IQWiG, 2023). Stores can be depleted long before anemia develops, which is why hemoglobin alone cannot show an early deficiency.
That’s why this article talks about ferritin more often than red blood pigment. If you want to know early on where you stand, look at your iron stores. For information on how to interpret individual ferritin levels, see the article on ferritin levels.
Who is most commonly affected
Iron deficiency is more common in women before menopause, primarily due to menstrual bleeding (IQWiG, 2023). In this case, regular blood loss is part of the equation, without anything being medically wrong. For pregnant women, the reference value of 27 milligrams per day is far higher than what a normal diet provides (DGE, 2023), which is why nutritional needs should be managed with medical guidance.
The third group is defined by diet. Lower serum ferritin concentrations and a higher risk of iron deficiency, including iron deficiency anemia, have been observed in some cases among people following ovo-lacto vegetarian and vegan diets (DGE, 2025). Here, “observed” means a finding about groups, not a statement about an individual.
When your symptoms no longer belong in the kitchen
This chapter deliberately comes before the foods. An article that puts the stop criteria at the end won’t reach the very reader they’re meant for.
Documented source
“Iron deficiency is the most common deficiency worldwide. Around 5 to 10% of people in Europe are affected.”
Institute for Quality and Efficiency in Health Care (IQWiG)
Iron deficiency and iron deficiency anemia, as of 2023
Common does not mean harmless. The same source puts the proportion of people in Europe with anemia due to iron deficiency at around two to five percent (IQWiG, 2023). At that point, changing your diet would be the wrong answer to the right question.
These signs should be assessed by a doctor
Visible blood in the stool or black stool
a sign of a source of bleeding that needs to be found
Significantly heavier or longer periods
the most common cause of recurrent iron deficiency in women before menopause
Shortness of breath or a racing heart during light exertion
such as climbing stairs, which used to be easy
Fatigue lasting for weeks without improvement
that persists even after getting enough sleep
Iron deficiency despite an iron-rich diet
then the cause is rarely the diet, but rather blood loss or absorption
This list is no substitute for an examination, and it's not a diagnostic checklist. A single point means little on its own. Fatigue has dozens of causes, and most have nothing to do with iron.
The picture becomes striking when several factors apply at the same time and persist for weeks. Many people researching this topic have already seen a doctor. They're missing a data point, not a promise.
How much iron you need per day
The German Nutrition Society last derived its reference values for iron in 2023. They are higher than many older guides suggest, and vary by sex and life stage.
Reference values per day
11 mg
for men aged 19 and over, unchanged across all age groups
16 mg
for women before menopause; after that, the value falls to 14 mg
27 mg
during pregnancy, when needs are highest
Source: German Nutrition Society, reference values for iron, last updated 2023
Why women before menopause need significantly more
The difference between 16 and 11 milligrams isn't a rounding error; it reflects regular blood loss. After menopause, this loss stops, and the reference value falls to 14 milligrams per day (DGE, 2023).
Breastfeeding women need 16 milligrams. The value of 27 milligrams for pregnant women is difficult to reliably reach through diet alone, which is why medical supervision, rather than a nutrition article, is what matters during pregnancy.
Why older guides give different figures
It's worth taking a closer look here, because two reputable sources give different figures. In its guidance, IQWiG says women before menopause are advised to consume 15 milligrams of iron a day, 10 milligrams is enough after menopause, and the recommendation for men is 10 milligrams in general (IQWiG, 2023).
The DGE gives values of 16, 14, and 11 milligrams for the same groups (DGE, 2023). For women before menopause and for men, the difference is one milligram. For women after menopause, it's four, considerably more than a rounding difference.
This article cites the DGE figures because it is the institution that derives reference values for nutrient intake in Germany. If you see 15 and 10 somewhere, the source isn't wrong; it's based on a different calculation.
Why these figures aren't the amount in your blood
A reference value describes what should be on your plate, not what ends up in your blood. It already includes a buffer for the limited absorption in the intestine. So if you eat 16 milligrams, you don't absorb 16 milligrams.
That's exactly where this article offers a practical lever. It's easy to increase the amount on your plate. Whether it gets absorbed is determined elsewhere.
Why iron is not all the same
Iron occurs in two forms in food. Heme iron is found in the muscle and blood pigments of animals; non-heme iron is found in plants and, in smaller amounts, in animal products.
The German Nutrition Society puts the difference succinctly: “Heme iron is more readily available to the human body than non-heme iron.” (DGE, 2025). It also explains the source: The body can make better use of iron from animal foods than from plant foods (DGE, 2023).
Key takeaway
Plant-based iron is not inferior iron. It is iron whose absorption can be managed through food combinations and preparation.
What this means for a plant-based diet
The DGE reports that people following ovo-lacto-vegetarian and vegan diets sometimes have lower serum ferritin concentrations and a higher risk of iron deficiency, including iron-deficiency anemia (DGE, 2025). This is an observation, not a warning against plant-based foods.
In practice, this means two things. People who eat a plant-based diet pay attention to pairing foods with vitamin C and are more likely than others to know their ferritin levels. Both take effort; neither requires giving anything up.
Why phytate is not the enemy
Phytate from grains binds iron in the gut and is therefore considered an absorption inhibitor (IQWiG, 2023). Yet these same whole-grain products are among the main contributors to iron intake in Germany, alongside meat, processed meat, vegetables, and legumes (DGE, 2023).
So a food can provide a lot of iron and, at the same time, inhibit its absorption. Whole grains are still one of the main sources, otherwise they would not appear in this DGE list.
How much iron different foods provide
The following figures are from IQWiG’s food overview (2023). They are given there as typical serving sizes; for this table, they have been converted to amounts per 100 grams so the foods can be compared. The serving size is stated in each note.
| Food | Iron per 100 g | Note |
|---|---|---|
| Pork liver, cooked | 19.5 mg | The highest value in the table. Liver is not recommended during pregnancy because of its high vitamin A content |
| Sesame | 10.0 mg | Whole grains often pass through the gut without being chewed. They are more readily absorbed when puréed or ground |
| Veal liver, cooked | 9.0 mg | Heme iron, easily absorbed. The usual serving is 125 g, which provides 11.3 mg |
| Beef liver, cooked | 7.8 mg | Like all organ meats, it is a storage organ, which explains its high content |
| Blood sausage | 7.7 mg | The usual serving is small at 30 g, so it provides around 2.3 mg |
| Pistachios | 7.3 mg | Non-heme iron. A 60 g serving provides 4.4 mg |
| Cashews | 6.3 mg | Good as a snack between meals, without anything that inhibits absorption |
| Chanterelles, steamed | 5.8 mg | Seasonal, but in a large serving: 200 g provide 11.6 mg |
| Oat flakes | 4.5 mg | Contains phytate, which slows absorption. Having fruit with it that contains vitamin C partially offsets this. |
| Soy bread | 4.4 mg | The highest bread value in the table. A 45 g slice provides 2 mg |
| Spelt bread | 4.2 mg | A 50 g slice provides 2.1 mg, as much as a serving of lamb's lettuce |
| Blue mussels, cooked | 3.8 mg | The highest-iron entry among fish and seafood |
| Duck, cooked | 3.7 mg | The table lists duck separately from poultry, which contains around 0.9 mg, far less |
| Beef, cooked | 3.3 mg | A 150 g serving provides 4.9 mg, around one third of women's daily requirement |
| Spinach, steamed | 3.1 mg | Contains oxalic acid, which binds some of the iron in the gut |
| Tofu | 2.8 mg | One of the few values given directly per 100 g |
| Chickpeas, canned | 2.2 mg | Drained and rinsed; 150 g provides 3.3 mg |
| Lamb's lettuce | 2.0 mg | The most iron-rich leafy green in the table, raw and without an oxalic acid concern |
Two things stand out about this ranking. First, nuts, seeds, and dark bread rank near the top, even though they're considered plant-based sources: sesame, at 10 milligrams, even ranks above veal and beef liver. Second, only pork liver, at 19.5 milligrams, clearly stands out from the rest.
Still, portion size matters in everyday life. Blood sausage contains more iron per 100 grams than beef, but it's eaten in 30-gram slices. Beef is served in 150-gram portions, so it provides more overall.
The values most people aren't expecting
Two food groups fare worse than their reputation might suggest. The first is fish. Salmon contains around 0.3 milligrams per 100 grams, smoked eel 0.7, and cooked tuna 1.0 milligrams (IQWiG, 2023). Only blue mussels, at 3.8 milligrams, and shrimp, at 1.8 milligrams, are among the top entries.
The second group is poultry. The table lists around 0.9 milligrams per 100 grams, less than lamb's lettuce. Duck is listed separately, at 3.7 milligrams. So the difference between two items in the same food group is greater than the difference between poultry and leafy greens.
How much processing changes the value
The biggest difference in the table is for rice. Cooked white, polished rice contains around 0.3 milligrams per 100 grams, while unpolished brown rice contains around 1.2 milligrams (IQWiG, 2023). That's four times as much for the same portion. Bread shows the same pattern: wholemeal rye bread contains around 1.3 milligrams, while spelt bread contains 4.2.
So if you want to change just one thing, change the type, not the amount. That's the cheapest adjustment in this entire article.
What boosts absorption and what slows it down
This is where most lists fall short. Two meals with identical iron content can deliver very different amounts to the body, depending on what else is on the plate.
Vitamin C can enhance absorption. IQWiG lists oranges and orange juice, broccoli, and red pepper as good sources (2023). The DGE confirms that ascorbic acid can promote the absorption of non-heme iron (2025).
Several groups of substances can inhibit absorption. These include tannins in red wine and black and green tea; oxalic acid in spinach, beetroot, rhubarb, and cocoa; phytate in grains; and phosphate (IQWiG, 2023). The same source also lists dairy products, soy products, and coffee as substances that interfere with iron absorption.
Three persistent claims
Common belief
“Spinach is the best source of iron.”
Supported by evidence
Cooked spinach contains around 3.1 mg per 100 g and is therefore lower in iron than liver, sesame seeds, nuts, and several types of bread. In addition, the oxalic acid it contains binds some of the iron in the intestine (IQWiG, 2023).
Common belief
“You can get rid of iron deficiency with the right diet.”
Supported by evidence
A mild deficiency in stage 1 is generally not treated with medication. For more severe deficiency in stage 2 or anemia in stage 3, iron supplements may be considered (IQWiG, 2023). A meal plan can meet your needs, but it won’t replenish depleted stores.
Common belief
“You have to cut out coffee and tea completely if you have iron deficiency.”
Supported by evidence
Evidence shows that tannins in black and green tea, as well as coffee, interfere with iron absorption (IQWiG, 2023). The sources reviewed here don’t say by how much, or whether leaving a time gap makes up for it. If you come across a figure, check where it comes from.
Practical takeaways
What is supported by evidence is the combination, not the avoidance. A glass of orange juice with muesli, red pepper with hummus, lemon over lentil salad. Anything beyond that falls into the category of plausible but unproven.
What a day with enough iron looks like in practice
Three examples, calculated using the serving sizes given by IQWiG (2023). They are not meal plans, but show what amount can realistically fit into a day.
Omnivorous diet, around 13 milligrams
For breakfast, 60 grams of oatmeal with 2.7 milligrams, plus one kiwi with 1 milligram. At lunch, 150 grams of beef with 4.9 milligrams. In the evening, two slices of spelt bread with 4.2 milligrams in total. That adds up to 12.8 milligrams and meets the reference value for men, but not for women before menopause.
Vegetarian, around 12 milligrams
In the morning, 50 grams of muesli with 1.7 milligrams and one chicken egg with 1 milligram. At lunch, 150 grams of chickpeas with 3.3 milligrams and 100 grams of lamb’s lettuce with 2 milligrams. In the evening, a slice of soy bread with 2 milligrams and 20 grams of sesame seeds with 2 milligrams. 12 milligrams in total.
Vegan, around 13 milligrams
Oatmeal with 2.7 milligrams, 100 grams of tofu with 2.8 milligrams, 150 grams of white beans with 3.3 milligrams, 60 grams of pistachios with 4.4 milligrams. That’s 13.2 milligrams on the plate. How much of it is absorbed depends more on the accompanying vitamin C than on the other two days.
A note on the vegetarian and vegan days: IQWiG (2023) lists soy products among the substances that inhibit iron absorption. So soy bread and tofu provide iron while also reducing its absorption. It’s more honest to acknowledge both facts than to leave one out.
Chapter at a glance
All three sample days provide between 12 and just over 13 milligrams of iron on the plate. That’s above the reference value of 11 milligrams for men, but below the 16 milligrams for women before menopause. None of the three days reaches the 27 milligrams recommended for pregnant women. If you need that amount, diet alone won’t get you there.
How to tell that diet alone isn’t enough
This is the part nutrition guides tend to leave out because it goes against their own headline. It still belongs here.
The key point here is this: Your diet meets your needs; it doesn’t replenish depleted stores. Those are two different tasks, and only the first belongs on a shopping list.
Four signs suggest that the cause isn’t on your plate. First: You’ve been consciously eating iron-rich foods for months and feel no different. Second: Your menstrual bleeding has become significantly heavier. Third: You have a known bowel condition or have had stomach surgery. Fourth: The deficiency returns after every round of replenishment.
In all four cases, the next sensible step is a test and a conversation, not another dietary change. If you don’t know what’s being lost, you can’t make up for it.
Intake and loss are two separate equations
Iron balance works like an account with two sides. One shows what comes in through food; the other, what is lost through bleeding and shed cells. A deficiency develops when the second side is persistently larger.
A nutrition article addresses only the first side. That’s enough as long as the second side is unremarkable. So if you recognize several of the warning signs in Chapter 2, you don’t need a better shopping list—you need an appointment.
Why larger portions don’t solve the equation
Reference values describe what should be on your plate. How much of it your body absorbs depends on the form of iron and the other ingredients in the meal (IQWiG, 2023; DGE, 2025). So the amount is only half the equation.
In practical terms, this means that if you make a change today, your levels won’t be different tomorrow. When it makes sense to measure them again and what should have changed in the meantime are matters to discuss with a doctor. The sources reviewed here provide no substantiated timeframe, and this article won’t make one up.
How to find out where your iron levels stand
So far, we’ve looked at amounts you can use without needing a number. A test result doesn’t change that, but it does help put things in context. The following four steps will help you prepare for a conversation with your doctor; they don’t replace one.
Keep notes for two weeks
What you ate and how you felt. No judgments, just notes.
Note possible sources of blood loss
How heavy your periods are, any known intestinal conditions, blood donations. That’s half the answer.
Read the results together
Ferritin and transferrin together show how well your iron stores are replenished (IQWiG, 2023).
Discuss your results
Bring your records and results with you. This can significantly shorten the medical history-taking.
Reference ranges vary depending on the laboratory, method, and age. Always follow the information on your own test result, not the numbers in an article.
A capillary blood test from mybody®x (MYBODY Lab GmbH) measures all three of these iron values together. You collect the sample at home with a finger prick, and it is analyzed in a laboratory.
Capillary blood test
VitalCheck | Complete Nutrient & Mineral Test
Measures ferritin, iron, and transferrin together, plus vitamin D3, B12, folic acid, magnesium, selenium, and zinc. According to the product page, all three iron values are needed to get the full picture, because ferritin alone can be misleading in cases of inflammation. The test provides a snapshot, not a diagnosis, and it does not identify the cause of any loss.
Lab analysis 3–5 business days after sample receipt
Product page information, accessed 08/28/2026
Anyone who just wants to know whether there’s anything to it will find an overview of the symptoms and testing methods in the article on the iron deficiency self-test. This article focuses on foods.
Who should get tested—and who shouldn’t
A test answers a specific question. If that question isn’t on your mind, it gives you a number with no clear next step.
It makes sense for you if …
you want to change your diet and need a baseline to compare against in a later test.
you follow a vegetarian or vegan diet and want to know what your ferritin level actually is.
you have been exhausted for weeks, and your doctor has only checked a complete blood count, which did not include iron levels.
Probably not if …
you notice visible blood in your stool or get out of breath with light exertion. In that case, seeing a doctor is the first step, not the second.
you are pregnant. Iron levels are monitored by a doctor during pregnancy anyway, and your needs are well beyond what a meal plan can provide.
you are already taking iron supplements. A result while you’re taking them says little about what your levels would be without them.
Limitations: what a blood test can’t do
An iron level is a data point, not an answer. It tells you how much is there right now, but says nothing about why it’s low.
The most common cause of recurring iron deficiency is blood loss, not inadequate intake. No at-home blood test can detect a source of bleeding in the digestive tract, and it can’t assess heavy periods.
There’s also a peculiarity of ferritin levels. They rise with inflammation and can therefore give the impression of better iron stores than you actually have. That’s exactly why the VitalCheck Complete product page says that ferritin, iron, and transferrin together provide the full picture.
There is one limitation to this article itself. The values in the table are averages from a food reference guide. The iron content of any particular piece of meat varies around those averages, and there’s no indication of this on the packaging.
What you can change starting tomorrow
If you take away just one action from this article, make it this: Add something with vitamin C to every iron-rich plant-based meal. Bell pepper with hummus, orange juice with cereal, lemon over lentils.
The reason is unremarkable. Of all the factors discussed in this text, this is the only one described as beneficial by two independent institutions, and it costs you nothing. Everything else works indirectly, and the sources reviewed do not quantify the effect.
At first, the question was which foods help with iron deficiency. The most honest answer is: They meet your needs, and that’s a lot. They don’t treat an existing deficiency, and that’s a job for someone with your test results in front of them.
Frequently asked questions
Which foods contain the most iron?
Pork liver tops the list at about 19.5 milligrams per 100 grams, followed by sesame at 10 milligrams, and veal and beef liver at 9 and 7.8 milligrams, respectively. Among plant-based sources, pistachios provide 7.3 milligrams and cashews 6.3 milligrams. The values have been converted to amounts per 100 grams from IQWiG’s serving-size figures (2023). In practice, however, portion size matters: blood sausage contains more iron per 100 grams than beef, but is eaten in 30-gram slices.
How much iron do I need per day?
The German Nutrition Society recommends 11 milligrams a day for men aged 19 and over, and 16 milligrams for women before menopause. After menopause, the figure drops to 14 milligrams. It is 27 milligrams for pregnant women and 16 milligrams for breastfeeding women. These reference values were set in 2023 and are higher than the figures in many older guides.
Can I treat iron deficiency through diet alone?
No, that is not the meal plan’s job. It covers your ongoing needs. According to IQWiG (2023), mild iron deficiency at stage 1 is generally not treated with medication, while iron supplements may be considered for more severe deficiency at stage 2 or anemia at stage 3. However, the fact that stage 1 does not require medication does not mean that food will resolve it. According to the same source, doctors determine the stage with a blood test.
What really inhibits iron absorption?
IQWiG lists tannins from red wine and black and green tea, oxalic acid from spinach, beetroot, rhubarb and cocoa, phytate from grains, and phosphate (2023). Dairy products, soy products and coffee are also listed. The sources reviewed do not specify how much these substances reduce absorption. If you come across a specific percentage, check what it is based on.
Why isn’t the ferritin level enough on its own?
Ferritin is the storage protein and, together with transferrin, shows how full your iron stores are (IQWiG, 2023). However, ferritin rises during inflammation and can then indicate better iron status than is actually the case. That is why it is considered alongside iron and transferrin levels. A single value without this context is easy to misinterpret.
Next step
A baseline instead of a guess
If you want to know where your ferritin, iron and transferrin levels stand, VitalCheck Complete provides a starting point for monitoring them yourself. It does not replace a medical evaluation, and it cannot identify the source of bleeding.
View VitalCheck Complete Understanding ferritin levelsRead more
You might also be interested in
What ferritin tells you, why it can be misleading during inflammation, and how it relates to other iron values.
An overview of the symptoms and ways to measure them, if you first want to know whether there is anything to it at all.
Sources
- Institute for Quality and Efficiency in Health Care (IQWiG): Iron Deficiency and Iron Deficiency Anemia (as of 2023) - gesundheitsinformation.de
- Institute for Quality and Efficiency in Health Care (IQWiG): How can I meet my iron needs? (as of 2023) - gesundheitsinformation.de
- German Nutrition Society (DGE): Reference Values for Iron Intake (derivation as of 2023) - dge.de
- German Nutrition Society (DGE): Frequently Asked Questions About Iron (as of 2025) - dge.de
The verbatim quote about the prevalence of iron deficiency comes from source [1], as do the details about the three stages, ferritin and transferrin, and the functions of iron in the body. All food values and information about substances that promote or inhibit absorption come from [2] and have been recalculated from the serving size to 100 grams for the table. The daily reference values come from [3], as do the verbatim quote about the better bioavailability of heme iron and the observation about vegetarian and vegan diets from [4]. Information about price, measured values, sample type and laboratory comes from the mybody®x product page, accessed on 28.08.2026; processing times follow the central guidelines for blood tests. All sources were accessed and reviewed on 28.08.2026.
mybody®x Editorial & Specialist Team
Laboratory diagnostics Nutritional science Blood test interpretation Nutrigenetics
This article was created by the mybody®x editorial and specialist team. The team brings together laboratory diagnostics, nutritional science and the interpretation of blood tests. You can find the contributors on the authors page.
Published on 31.08.2025 · Last updated on 28.08.2026
The content is for general information and does not replace medical advice, diagnosis or treatment. Reference ranges depend on the laboratory, method and age - the information on your report is always authoritative.
