This high potency, immune supporting formula provides 1000mg Vitamin C (in two tablets), with Blackcurrant, Black Elderberry and Bilberry, plus Zinc, to help prevent oxidative damage to the body. Blackcurrants are a potent source of anthocyanidins. Take up to 6 tablets a day for a powerful antioxidant boost that may help protect you from nasty coughs and colds, as well as oxidative stress.