Holland & Barrett High Strength Effervescent Vitamin C & Zinc High-strength effervescent supplement delivering two critical immune nutrients in a refreshing, easy-to-drink orange-flavoured format. Vitamin C contributes to normal immune function, reduces tiredness and fatigue, supports normal collagen formation for skin, bones and blood vessels, and enhances iron absorption. Zinc supports immune response, contributes to protection of cells from oxidative stress, and supports normal cognitive and metabolic function. The effervescent format encourages hydration and is ideal for those who prefer not to swallow tablets.