What should I know before taking vitamin B7?

Neal Spruce
Neal Spruce on behalf of dotFIT
What you are taking it for and if it has a high potential to deliver the desired outcome. The only reason you would use a separate vitamin B7 (biotin) supplement would be to correct a deficiency diagnosed by a qualified physician. At the same time your doctor can give you any necessary advice on proper use or any individual contraindication. Vitamin B7(biotin) is involved in many important energy producing enzymes and is often recommended for strengthening hair and nails. Little evidence exists that it can deliver on this recommendation unless someone was deficient, which is rare in developed nations.

Full biotin deficiency is rare because in normal healthy persons our intestinal bacteria produce it in excess of the body's daily requirements, which are only about 30-100 mcg/day. That said, there are individuals with abnormal metabolism of biotin leading to certain metabolic disorders. In this case they may be treated by a qualified physician with biotin therapy.

Biotin sources include Swiss chard, eggs (mainly the yolk), liver, some vegetables and supplements. 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 B7 supplements if you follow your doctor's orders or the labeling instructions. Pregnant and breastfeeding women should talk to their doctors about the appropriate dose in order to avoid taking too much. People who smoke, use some antibiotics or seizure drugs, are undergoing kidney dialysis or have genetic biotinidase deficiency, should ask their doctors if they should increase their vitamin B7 intake.

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.