Question

Vitamins

What is vitamin B7?

A Answers (3)

  • AStacy Wiegman, PharmD, Pharmacy, answered
    Vitamin B7 is a member of the B-vitamin family called biotin or vitamin H. It is produced in the body and found in many foods. Most people who eat a healthy diet will not need to take a B7 supplement, but it can be bought over the counter or prescribed by a doctor if needed. It helps keep nails and hair healthy and helps control cholesterol, making it a very important nutrient. Ask your doctor if you are worried that you are not receiving enough vitamin B7 through your diet alone.

  • AElizabeth Casparro, MPH,RD, Nutrition & Dietetics, answered

    Vitamin B7, also known as biotin, is an essential water-soluble nutrient involved in many different reactions. It is essential for energy metabolism, carbohydrate metabolism, gluconeogenesis (making of glucose from non-glucose sources), fatty acid (parts of fats) metabolism, amino acid (building blocks of proteins) metabolism and DNA synthesis. Deficiency is rare since it occurs in so many different food sources: whole grains (not enriched), eggs, nuts and legumes. Toxicity level is unknown, but can be mostly attributed to the fact that excess amounts are readily excreted from the body.

  • ANeal Spruce, Fitness, answered on behalf of dotFIT
    Vitamin B7 is also known as biotin, which is necessary for energy production, cell growth, production of fatty acids, and the metabolism of fats and amino acids. It plays a primary role in all of our cells’ energy production by being an integral player in the citric acid cycle where biochemical energy is generated as we breathe. Biotin is often recommended for strengthening hair and nails. Little evidence exists that it can deliver on this recommendation unless someone was deficient, which would be very rare in developed nations. Biotin deficiency is rare because in normal health our intestinal bacteria produce it in excess of the body's daily requirements, which are only about 30-100 mcg. That said, there are individuals with abnormal metabolism of biotin, which can lead 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.
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What is the recommended dietary allowance of vitamin B7?