Find the most effective at-home lab tests for unexplained fatigue!
Which at-home lab tests can specifically help with unexplained fatigue?
Do you wake up feeling like you have been hit by a truck? Do you sleep 8 hours, but it is not enough? Does your fatigue persist even though your doctor says “everything is normal”? You are not alone—about one in four Germans suffers from chronic fatigue.
The problem: Fatigue is a symptom, not a disease. The real causes are often hidden beneath the surface: nutrient deficiencies, hormonal disorders, gut problems, metabolic imbalances. And the good news? With professional at-home lab tests, you can uncover these causes—and then take targeted action.
Chronic fatigue: Why is it more than just “being tired”?
You can remedy normal tiredness with sleep. But chronic fatigue is different—it robs you of quality of life, concentration, and energy for everyday activities.
The tricky part: Your body sends you signals that something is wrong—but which problem exactly? That is why you need **clarity** about the true causes.
The 8 most common causes of chronic fatigue
Here are the main causes that are often overlooked—and how to uncover them:
1️⃣ Vitamin D deficiency
The problem: You get enough sleep, but your body does not have enough vitamin D. This causes fatigue, depression, and low energy.
Who is affected? People with little sunlight exposure, during the darker months, people with dark skin in northern regions.
🔬 Test: VitalCheck Complete (vitamin D measured)
2️⃣ Iron/ferritin deficiency
The problem: Iron transports oxygen. Too little = your body is undersupplied = crushing fatigue.
Who is affected? Women with heavy periods, vegetarians, people with chronic bleeding, gastrointestinal problems.
🔬 Test: VitalCheck Complete or rapid iron test
3️⃣ Vitamin B12 deficiency
The problem: B12 is essential for nerves and energy. A deficiency causes extreme fatigue and memory problems.
Who is affected? Vegans, people with gastrointestinal disorders, older adults, people with alcohol dependence.
🔬 Test: VitalCheck Complete (B12 + transcobalamin)
4️⃣ Thyroid disorders
The problem: Your thyroid controls metabolism. When it is underactive (hypothyroidism), your body slows down = fatigue.
Who is affected? Women (3x more often), people with iodine deficiency, autoimmune diseases.
🔬 Test: VitalCheck Complete (TSH) or Longevity (more comprehensive)
5️⃣ Gut dysbiosis (microbiome imbalance)
The problem: Your gut flora is out of balance. This leads to poor nutrient absorption and chronic fatigue.
Who is affected? People who have taken antibiotics, have a poor diet, experience stress, or have gastrointestinal problems.
🔬 Test: Microbiome Complete (5–10 working days)
6️⃣ Magnesium deficiency
The problem: Magnesium is necessary for energy production. A deficiency leads to fatigue, muscle cramps, and sleep problems.
Who is affected? People under stress, athletes, people with diarrhea, and people with diabetes.
🔬 Test: VitalCheck Complete (magnesium measured)
7️⃣ Metabolic disorders & insulin resistance
The problem: Your body cannot process blood sugar properly. This leads to drops in blood pressure and extreme fatigue.
Who is affected? People who are overweight, at risk of diabetes, have a poor diet, or get little exercise.
🔬 Test: Longevity (DNA + metabolism analysis)
8️⃣ Genetic factors & sleep genes
The problem: Some people are genetically predisposed to faster exhaustion or sleep disorders.
Who is affected? People with parents who sleep a lot, chronic fatigue in the family.
🔬 Test: Longevity (DNA analysis for sleep types)
Quick check: Which cause fits you?
Do you recognize yourself?
- ✅ Do you sleep 8+ hours but wake up tired? → Vitamin D, B12, or thyroid
- ✅ Do you also have headaches or dizziness? → Iron deficiency
- ✅ Do you have bloating or digestive problems? → Intestinal dysbiosis
- ✅ Do you crave sugar & carbohydrates? → Metabolic disorder
- ✅ Are you constantly cold, and is your metabolism slow? → Thyroid
- ✅ Are you stressed, experiencing cramps, or feeling nervous? → Magnesium deficiency
- ✅ You need lots of coffee to function? → Several deficiencies at once
The best at-home laboratory tests for fatigue
Now you know the possible causes. But how do you find out which one is the problem for you? With these tests:
🏆 VitalCheck Complete – The all-in-one blood test package
This is your first choice if you want to test for most causes of fatigue:
- ✅ Vitamin D, B12, folic acid, transcobalamin
- ✅ Iron & ferritin
- ✅ Magnesium, calcium, zinc
- ✅ Thyroid (TSH)
- ✅ Cholesterol & blood lipids (metabolism markers)
- ✅ Personalized recommendations for your values
Results in ~5 working days | You receive clear answers to most questions.
🧬 Longevity – The complete package with DNA
Do you want more: not just current values, but also genetic predispositions & comprehensive metabolism analysis?
- ✅ All blood values like VitalCheck (nutrients, thyroid, etc.)
- ✅ DNA analysis for sleep genes, metabolism, and energy production
- ✅ Detailed dietary recommendations based on your genes
- ✅ Lifestyle optimization (exercise, sleep, stress)
- ✅ Personalized longevity strategy
Results in 15–25 business days | The ultimate understanding of your energy & metabolism.
🦠 Microbiome Complete – When your gut is the problem
Your blood values are normal, but you also have digestive problems? Your gut flora could be the cause of your fatigue:
- ✅ Analyze your gut flora composition
- ✅ Identify dysbiosis (imbalance)
- ✅ Check for fungal overgrowth (causes fatigue)
- ✅ Leaky gut marker (chronic inflammation = fatigue)
- ✅ Specific dietary recommendations for gut healing
Results in 5–10 business days | A healthy gut is often the key to more energy.
⚡ Rapid Tests – If you only want to test one specific thing
Do you only need to test vitamin D or iron? There are also budget options:
- 💉 Vitamin D Rapid Test (€14,50)
- 💉 Iron Ferritin Test (€14,50)
- 💉 Thyroid TSH Test (€14,50)
Ideal for: You already know what you want to test, or you need quick clarity about a specific concern.
Which test is right for your situation?
🎯 You want quick clarity
→ VitalCheck Complete
Most nutrients in a single test, results in ~5 business days, and concrete recommendations for action.
🧬 You want the full picture
→ Longevity DNA Test
Genetic predispositions + blood values + nutrition + lifestyle. The complete solution.
🦠 You have gut problems
→ Microbiome Complete
Gut flora analysis + dysbiosis detection. An unhealthy gut is often the cause of fatigue!
💰 You need a budget option
→ Rapid Tests
Only test vitamin D or iron? €14,50 for specific answers.
Frequently Asked Questions (FAQ)
🚀 Start now: Discover the cause of your fatigue
Are you tired of being tired? Do you need clarity about the real cause? Choose your test, complete it at home, and receive concrete answers within a few days—plus recommendations for regaining your energy.
What you can expect afterward: A deep understanding of why you are tired. A concrete plan for what you can do. And above all: the hope that you can regain your energy.
Free shipping on orders over €49 | Results in 5–25 business days (depending on the test) | Personal consultation available