GNC Biotin 300 mcgGNC Biotin 300 mcg Hair, Skin & Nail Support Supplement GNC Biotin 300 mcg is an essential dietary supplement that supports healthy hair, skin, and nails. Also known as Vitamin B7, biotin helps promote hair growth, strengthen nails, and maintain vibrant skin, making it an ideal choice for a healthier, more radiant appearance. Product Features: Promotes Hair Growth: Supports healthy hair and helps reduce hair loss. Strengthens Nails: Helps prevent