Are there any risks in taking vitamin B7?

Neal Spruce
Neal Spruce on behalf of dotFIT
Generally, no. Vitamin B7, also known as biotin, is a water-soluble vitamin and therefore healthy humans will excrete what they don’t use unless dosages chronically exceed an established Upper Limit (UL), which at this time has not been set for biotin. Animal studies using high doses of biotin, well above the average human needs (~30-100 mcg/day), have shown no adverse effects. There are no reported cases of adverse effects from high doses of the vitamin used in treatments of metabolic disorders. There are virtually no known contraindications but concerns about biotin overdose have been raised in individuals with “health risk” issues such as pregnant women, people with kidney or liver problems or a history of seizures -- all of whom should consult a qualified physician before supplementing. Most daily multivitamin and mineral formulas (MVM) contain all the biotin necessary (and probably a little more) for normal healthy people. Although biotin deficiencies are rare, marginal deficiencies have been shown in certain populations such as during pregnancy, athletes, dieters, elderly, alcoholics, and burn patients, which can lead to decreased energy production and other biotin related functions. For this reason we always recommend a daily MVM to all populations containing between 100-300 mg of biotin (B7). Active people maintaining low body fat may do better at the higher part of this range.
You should not have any problems while using vitamin B7 supplements if you follow your doctor's instructions. If you are pregnant or breastfeeding, talk to your doctor about the appropriate dose in order to avoid taking too much. You should also be sure that you are not allergic to any ingredients in the supplement you are planning to take. Talk to your doctor if you are worried that you might have a negative reaction to your supplement.

Continue Learning about Vitamins



In the United States, the Food and Drug Administration (FDA) regulates vitamin supplements and provides recommended daily amount information. The FDA says that we should pay attention when considering vitamin supplements, because ...

frequently many different vitamins and minerals are combined into one product.

Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.