Oct 29, 2025
3 min read
High doses and questionable ingredients can make vitamin D pills dangerous.23 of the preparations, only a few are harmful.
- According to a test conducted by "Öko-Test", not all vitamin D tablets on the market are recommended.
- One problem is daily doses that are too high and exceed the maximum recommended doses.
- The testers also detected a substance suspected of being carcinogenic in three preparations.
Many people take vitamin D in the winter to prevent deficiency, but consumers must choose the product carefully.In a recent vitamin D test conducted by the company "Öko-Test", popular pharmaceutical brands such as Abtei or Doppelherz failed: Consumer magazine experts criticize extremely high daily doses and ingredients that, among other things, increase the risk of cardiovascular disease or are considered carcinogenic.
The results raise questions: despite the presence of a controversial substance, two products with a “good” rating reach the top positions.However, only three vitamin D tablets can be used without any harmful additives.We offer you the best preparations.
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This is the best vitamin D tablet test
- Dekristol 1000 IU vitamin D3 tablets (200 pcs.)*, test result: very good
- HEVET 1,000 IU Vitamin D3 Tablets (200 pieces) *, Test result: Excellent
- Pure ecampsulas 1,000 IU Vitamin D3 Capsules (60 pieces) *, test results: Good
When taking vitamin D preparations, pay attention to the recommended dosage concentration
If the body lacks vitamin D, symptoms such as fatigue, hair loss and susceptibility to infections may appear.Anyone who has had a vitamin D deficiency can interpret the symptoms correctly and take countermeasures early.However, doctors advise not to take preparations on your own, as an overdose can have serious consequences.These include kidney damage and heart arrhythmias.
Martin Smolich from the university hospital "Oko-test", "Oko-test" to "Oko-test" higher doses are not only checked by a doctor, you only need to take small daily doses to avoid health consequences: they are almost risk-free from 800 daily tablets with 1000 IU.
The Federal Institute for Risk Assessment (BfR) also explains that no "health problems" are expected if taking up to 20 micrograms of vitamin D per day.20 micrograms is equal to 800 international units (IU) - this is the unit of exposure to the substance.Dosage recommendations also apply to vitamin D drops, which were also tested by "Öko-Test".
When should I take vitamin D?
Our body can meet 80 to 90 percent of our vitamin D needs: with the help of UV-B rays, the skin produces the solar vitamin and stores it in reserves of fat and muscle tissue.Vitamin D foods, however, contribute only 10 to 20 percent of your daily needs.
Those who spend every day outside in the summer usually don't have to worry about lack in the winter.According to the Robert Koch Institute (RKI), between November and February, the UV-B radiation is so weak that the body cannot produce vitamin D. But the deposits built up during the summer can then ensure a winter supply.
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However, some risk factors will affect the body's production and storage of the vitamin.These include, among other things, stomach, muscle and liver discharge and age.The reason is that as the skin thins over the years, people with less d. People with dark skin also tend to be deficient in vitamin In.
Smollich explains to "Öko-Test": "Vegetables and vegetarians also often have low levels of vitamin D."plays an important role.
Vitamin D tablets in the test: 15 out of 23 preparations were overdosed
"Oko Test" tested vitamin preparations for the last time in 2018.At that time, 21 products were tested.The current test, from January 2025, included 23 tablets, capsules and drops.Experts worked with a laboratory to evaluate more than nine over-the-counter medications and 14 nutritional supplements.
Unlike medications that can prevent vitamin D deficiency diseases, dietary supplements are not intended to treat complaints or diseases—because they are classified as foods.However, their consumption may be beneficial for people at high risk of vitamin D deficiency, says Octo-Test.
- Also interesting: Dementia: Neurologist discovers how vitamin D can reduce risk
The test results also show that the drug is no better than dietary supplements: Five products fail in both categories.Recycled ingredients and Vitamin D content are removed from the specifications and to put the money right, this applies to 15 products.
"Bullet test" finds harmful substances in vitamin D tablets
Testers have also encountered respectable and controversial substances such as phosphate, which in large quantities can damage the kidneys or artificial sweeteners.Studies show that they increase the risk of cardiovascular disease and can lead to scarring.
In the "Summary Selection" category, two points are deducted if the product contains salts.This is a substance that is used as a filler or separating agent.Last year, the International Agency for Research on Cancer (IARC) classified the message as "probably scarred", as öko-test itself states in its test report.
Talc was found in vitamin D preparations from Vigantol, Vitagamma and Tetesept, but the first two products received an overall rating of "Good" in the test.Why?When asked by our editors, Katja Tölle, the deputy editor-in-chief of "Öko-Test", explains: "The IARC classification is very new, the debate in Europe is still ongoing."At this point it is still too early and the data is not clear enough for an even stricter reduction, she says.However, in other categories the preparations were convincing, for example in terms of daily dose and evidence of effectiveness.
Test winner: the best vitamin D tablets in the competition
The results of the "test" of the "Eco-test" are clear: 8 vitamin D tablets and capsules of stones and covettes fail, but at least five meet the test criteria.Drugs include dextol and hextol and rander hecks "very good" level.Top products to look at:
Dekristol 1000 IE tablet with vitamin D3 "very good"
Dekrystol 1000 IU tablets are used for the prevention and treatment of vitamin D deficiency. Each tablet contains 1000 international units (IU) of Cholecalciferol (Vitamin D3).The application is intended for daily use in low doses.If the recommended daily dose is followed, the tablets are considered well tolerated.
Vitamin D3 tablets are one of the winning products in the "Öko-Tect.
Vitamin D3 is available in vitamin D tablets.The pill can be divided and allow variable doses.They are in monohydrate and can move accordingly.People who are full of laughable things should discuss them with their doctor.
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Good supplement: pure pure with pure vitamin D 1000 IU
Pure Encapsulations Vitamin D3 is a dietary supplement containing 1000 IU of Vitamin D per capsule. It is recommended to take one capsule daily with a meal.According to the manufacturer, the product is vegetarian and does not contain any additives, making it suitable for people with food intolerances and allergies.
NOTE: For specific instructions for use and possible side effects, read the package leaflet and seek advice from your doctor or pharmacist.
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