Biotin (also called Vitamin B7 also known as vitamin H) is a water-soluble vitamin which serves as a crucial cofactor for carboxylase enzymes across a range of metabolic pathways. Because of its inexpensive cost and the abundance of available in cosmetics biotin has been the latest trend among consumers who want to grow longer and healthier nails and hair. The current recommendations for biotin from the Insti- tute of Medicine stipulate that the daily recommended consumption (AI) of adults should be 30 mg a day.
The majority of healthy people have these requirements by eating an energizing diet, but there are some who take 500-1,000 mg biotin supplementa every day. Although no serious adverse effects of excessive biotin have been identified but the evidence on the benefits of biotin’s effects on the growth of nails and hair is a bit hazy. Furthermore, outside the context of malnutrition, pregnancy or medication-related effects, as well as biotinidase deficiencies in children reports of low levels of biotin have not been reported often. So, we suggest that biotin deficiency in its true form is rare and there isn’t enough evidence for supplementation to promote hair growth and nail growth in those who don’t have low biotin levels.
While its usage for hair and nail growth booster is widespread however, research demonstrating the effectiveness of biotin is not extensive. For cases of acquired or genetic causes of biotin deficiency and also pathologies, like brittle-nail syndrome or hair that is not combable supplementation with biotin may prove beneficial. We believe that these are rare and there is a lack of adequate evidence for supplementation for healthy people.
The complete analysis can be read in the following article: Biotin for hair loss: overhyped and ineffective