"Biotin is a water-soluble nutrient that’s essential for hair, nails, and skin health. It’s also used to boost the production of keratin, a protein that makes up hair and nails.
Biotin is most often found in eggs, dairy products, and meats. It can also be taken as a supplement.
It’s best to take biotin one hour before breakfast to ensure your body gets enough of it.
While there aren’t any studies that prove biotin will help grow your beard, there are some anecdotal reports of it working for some people.
It’s important to remember that any substance you put into your body does have the potential to have some unwanted side effects, so it’s best to consult with your doctor before taking biotin for beard growth."