SkinMed combine vitamin C (10% ascorbic acid) and super oxide dismutase (SOD), an enzyme that forces superoxide to immediately convert to a weaker free radical that vitamin C can neutralise, Both SOD and ascorbic acids are boosted by adding in Zinc to the serum. This serum is only activated when you want to use it, so you activate each of the six bottles in the pack as you finish the previous one. The key active ingredients are kept in a unique vacuum sealed capsule in the bottles for maximum activity. So now you can target 100% of your free radicals to slow down skin damage, ageing of skin, improve elasticity and firmness, resist the formation of age spots, plaques and thread veins and reduce flushing episodes.