- A full 160mg of naturally sourced anthocyanidins (from extracts of bilberries and grape seed) per tablet - The skin \'loving\' phytonutrients, lutein, zeaxanthin and green tea are also included - Plus vitamin C, which supports normal collagen formation and the normal functioning of blood vessels - And niacin and biotin that also support the maintenance of normal skin Colladeen Derma Plus is specially formulated to support the health of skin and increase the body\'s natural defences against sun damage. Anthocyanidins are a group of flavonoid compounds found in dark skinned fruits, berries and even pine bark. Scientists studying these particular plant compounds have focused much of their work around the role they play in helping to support collagen, the tough protein that gives skin its elasticity. This provides a full 160mg of anthocyanadins per tablet. Many similar products provide less than 20mg per tablet.