PSA The Most Hydration Serum in Beauty: NA. PSA The Most Hydration Serum in Beauty: NA. When the thirst is real, dehydrated skin doesn't just need a bit more moisture - it needs The Most. This nutrient-packed hydrating serum from PSA is like an island oasis for stressed out, hungover, dull, and dehydrated skin. It provides essential hydration immediately while helping skin cells better retain moisture overall for plump and supple skin. Formulated with a Hyaluronic Acid Complex, made with different-sized molecules to penetrate the skin more thoroughly, hydrating multiple layers, Panthenol & Bisabolol, skin-conditioning humectants to soothe and moisturize, Sodium PCA & Allantoin to replenish hydration and stimulate healthy skin regeneration, and Kombucha & Acai Berry, rich in probiotics, omega fatty acids, and Vitamins C & A to repair and protect against free radical damage, increase cell turnover, and tackle hyperpigmentation, leading to brighter and more hydrated skin.. Suitable for combination, dry, normal, oily, and sensitive skin. Vegan & cruelty-free. Free of Silicones, Sulfates, Drying Alcohol, Mineral Oil, Chemical Screens, Essential Oils, Synthetic Dyes & Fragrances. 1 fl oz/ 30 ml. After cleansing and toning, apply all over face, eye area and neck daily. Follow with moisturizer and/or facial oil. PSAR-WU1. PPTMHS030EN01. PSA stands for Purposeful Skincare by Allies. PSA isn't just their name - it's their mission. They're a skincare brand driven by purpose. PSA believes skincare should be clean & effective, so you'll only find clinically proven actives in optimal concentrations without any potential irritants in their formulas. Their reason for being will always be to create products that deliver glowing results you can feel and see in the mirror.