What is Vitamin C? Vitamin C is an essential nutrient that is perhaps best known for its role in contributing to a healthy immune system. But there is a long list of proven health benefits for vitamin C: it helps to reduce tiredness and fatigue, protects your cells from oxidative stress, and helps the normal function of joint cartilage, skin and bones. But as vitamin C is water soluble, the body cannot store it - so it’s important to maintain a regular intake through our diet, or dietary supplements. Why choose Opti-C? We use an innovative form of vitamin C, formulated with plant-sourced fatty acids and citrus bioflavonoids to increase uptake in the body, meaning Opti-C® is 233% better absorbed than standard vitamin C. Each tablet contains 500mg of highly absorbable vitamin C (625% NRV) to safeguard you from deficiencies.