Vitamins to strengthen nails are Biotin (Vitamin B7), which supports the health of the nail bed, for healthier, stronger nails. Vitamin C - as an antioxidant vitamin, this helps support natural collagen synthesis in the body, which supports strong, healthy nails. Other nutrients include Iron as this mineral supports healthy oxygenation, circulation and nutrient delivery which results in healthy pink nails that will not break, chip or peel. Collagen, as this specific protein may support the strength of your nails by preventing brittleness. Additionally, it may help your nails to grow longer. Zinc helps to promote the growth of healthy nails and keeps them growing at a healthy rate.