Amino Acids + Citrus Hydration & Defense Serum For dehydrated, environmentally-stressed, and mature skin. Contains citrus essential oils - best for skin that tolerates botanical fragrances. Deep hydration, visible brightness, and protection against environmental stress from a lightweight serum that absorbs in seconds. The Rescue Serum combines a complete amino acid complex, vitamin B5, and a brightening citrus antioxidant blend to replenish moisture, even skin tone, and defend skin against pollution, daily oxidative stress, and the toxins that build up throughout the day. Especially valuable for skin that feels dehydrated from travel, indoor environments, seasonal shifts, or urban exposure. Because Rescue Serum contains citrus essential oils, those with skin highly reactive to fragrance may prefer Youth Serum instead.Best used at night. Rebuild. Boost. Every night.