Collagen may promote healthy hair in a variety of ways. For one, your body may be able to use the amino acids in collagen to build hair proteins and strengthen the skin that contains your hair roots. It may also prevent hair follicle damage and graying.

Collagen is often featured in biotin shampoo and is a structural protein that maintains hair strength and elasticity. Collagen may also be beneficial to your scalp to maintain a healthy dermis and prevent hair thinning. When applied topically, it may encourage hair growth.

The bottom line is if you’re experiencing hair thinning or hair loss, biotin may assist in regrowth.

When you apply biotin directly to your hair or topically, you will get the same benefits of ingesting biotin as a hair vitamin. But you are guaranteed instant fullness; perfect for fine or thin hair. It does strengthen the hair follicle. Stronger hair allows each strand to reach the end of its growth cycle without breakage and less damage.