The Philip Kingsley Biotin Boost is a daily hair supplement that works from the inside out to promote maximum hair strength. Developed by the brand's expert trichologists to provide extra daily nutritional support for your hair, the tablets may contribute to enhanced hair strength & resilience with a blend of Biotin (Vitamin H), Zinc & Vitamin B12. Ideal for those wanting to optimise hair strength, & those with low protein diets, the hair nutrition formula will provide vitamins & minerals to help strengthen tresses. Suitable for vegans, vegetarians & those who are gluten free.