Vitamin C contributes to healthy hair and nails, supports bone health, and improves body metabolism: Apart from improving the immune system, vitamin C is necessary for the body to produce collagen, which is important for healthy skin. Due to its strong antioxidant effect, it helps to protect the body’s cells from the damaging effect of free radicals. Free radicals can cause many health problems; thus, one can significantly reduce the chance of many illnesses through an adequate intake of vitamin C supplements. Vitamin D3 is important for building and keeping strong bones. Vitamin D3 offers many health benefits. It is known to help strengthen bones and muscles, boost immunity, increase mood, aid in weight loss, and improve heart function. Zinc, a nutrient found throughout your body, helps your immune system and metabolism function.