Biotin (also called Vitamin B7 also known as vitamin H) is an water-soluble vitamin that acts as a vital cofactor carboxylase enzymes across a range of metabolic pathways. Because of its affordable cost and its wide availability in cosmetics biotin has been the latest fashion for those looking to achieve longer, healthier nails and hair. Biotin is currently being recommended by the Insti- tute of Medicine states that the recommended daily consumption (AI) in adults amounts to 30 mg/day.
The majority of healthy people can meet these standards through an energizing diet, but some still consume 500-1,000 mg biotin supplementa each day. Although no serious adverse effects of biotin excess have been documented however, information on the real benefits of biotin’s effects on the growth of nails and hair is not extensive. Furthermore, outside the context of malnutrition during pregnancy or medication-related effects, as well as biotinidase deficiencies in children reports of low levels of biotin have not been reported often. We propose that biotin deficiency in its true form is not common and that there isn’t sufficient evidence to support supplementation for hair growth and nail growth in those who don’t have low biotin levels.
While its application for hair and nail growth aid is common however, research demonstrating the effectiveness of biotin is not extensive. In the case of acquired and inborn causes of biotin deficiencies and pathologies, like brittle-nail syndrome or hair that is uncombable supplementation with biotin may be beneficial. But, we believe these are rare and that there is a dearth of adequate evidence for supplementation in healthy people.
The complete analysis can be read in their article: Biotin for hair loss: overhyped and ineffective