Vitamin C 1000mg Tablets | Biocare (30). Vitamin C 1000 provides 803mg of citrus-free magnesium ascorbate (a low-acid form of vitamin C) with the bioflavonoids bilberry and grapeseed extract.. High potency, low acid form of vitamin C with bilberry extract in a convenient one a day tablet. Effective - vitamin C is a rich antioxidant which helps to protect cells from oxidative stress, supports the immune system and collagen formation for healthy skin. Optimum support - providing over 800mg of vitamin C per daily dose as magnesium ascorbate which is a low-acid form of vitamin C, making it gentler on the stomach and more easily absorbed. Advanced – combined with bilberry, one of the richest sources of flavonoids for additional antioxidant support. Convenient - one a day tablet. No unnecessary additives. Environmentally friendly – recyclable packaging. Suitable for vegetarians & vegans