Niacin (Vitamin B3), Vitamin B6, Vitamin C, Biotin and Copper contribute to normal functioning of the nervous system. Zinc contributes to normal cognitive function. Also contains L-Arginine. GOLD COLLAGEN PURE PLUS has been formulated by our scientists and nutritionists as an enriched version of the original PURE GOLD COLLAGEN with Rocket, L-Arginine and Saffron Extract.