Biotin is a B vitamin that is an essential nutrient, most often found naturally in food. You get it from eggs, salmon, cauliflower, avocado and cucumber. Its function in the body is to support our metabolisation of carbohydrate, protein and fat.
This ability to support protein strengthens Keratin (a tough protein that hair is made off), by helping to support and strengthening the core protein within hair, Biotin stop the hair loss process and bolsters the protein within each strand, allowing hair to look thicker and fuller.
Biotin as a supplement has led to it being labeled "hair food" and rightly so, since one of the effects seen most often is an increased rate of growth in the hair when taking it on a daily basis.
The magic number seems to hover around 5,000 mcg a day and daily consumption is key to its efficacy.
Being inconsistent when taking biotin will definitely vary your results. It's also important understand that, as with any supplement, hair growth will not happen overnight.
You'll most likely see results after about a month or so, but some people notice a difference in as little as two weeks.
Biotin has also been shown to increase beard, eyelash, eyebrow and nail growth, and can even be a great treatment for people who are suffering from eczema.
Even alopecia has been shown to respond positively when biotin is introduced.