Who should not take vitamin B7?

Neal Spruce
Neal Spruce on behalf of dotFIT
Everyone should get their vitamin B7, also known as biotin, through diet and their daily multivitamin and mineral formula (MVM) for added insurance of reaching normal daily needs of ~30-100 mcg/day unless instructed by their physician. Generally, there are few people unable to supplement Vitamin B7 because it 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, 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.
Vitamin B7 occurs naturally in many foods, and everyone needs a certain amount of vitamin B7 to be healthy. There are no defined limits on who should not use B7, but pregnant and breastfeeding women should be sure to stay within the maximum daily dose recommended by their doctors. Always use B7 according to the label's instructions. Taking any supplement in excess could result in side effects.

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.