Brightens, firms, fights visible signs of aging and delivers all-day hydration Truth Serum is like a daily multivitamin for the skin and Ole Henriksen’s #1 age-defying serum. Ole was an early adopter of vitamin C in skincare, believing that its antioxidant properties and role in promoting collagen make it a crucial ingredient. Supercharged with True-C Complex™ and collagen, this potent age-defying serum helps brighten and firm the skin as it delivers all-day hydration