Caudalie Vinoperfect is a lightweight serum for dark spots caused by acne, sun exposure, aging, pregnancy, and other forms of uneven tone. Instead of vitamin C, retinol, or exfoliating acids, it uses Viniferine—a patented extract made from grapevine sap. The formula also includes squalane, glycerin, and bisabolol to help keep the skin hydrated and comfortable. In Caudalie’s 56-day study, dark spots appeared 63% less intense after one bottle among 65 volunteers. A smaller study involving 33 volunteers with deeper skin tones reported an 81% reduction. These results come from studies run for the brand.