Yeni Pharma Shampoo with Vitamin B6: Boost hair growth and collagen production, since the hair is made largely out of protein, you can augment your hair growth by taking vitamin B6. It can help to keep your skin and scalp healthy, which will in turn promote better hair growth. Vitamin B6 deficiency can bring on a skin condition called dermatitis which is often responsible for slower hair growth and thinning. Yeni Pharma Shampoo with B Vitamins is a shampoo formulated as a complement to hair loss treatments.