Along with boosting metabolism, biotin can also aid in weight loss. Essentially, consuming or ingesting biotin elevates your resting rate of metabolism. As this vitamin increases your metabolism, it can help accelerate weight loss, especially when paired with chromium.
It is also used orally for hair loss, brittle nails, skin rash in infants (seborrheic dermatitis), diabetes, and mild depression.
Although research is limited, studies from 2012 and 2015 suggest that results may be seen in as little as 90 days. This includes an increase in growth and shine.