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Glycerin is a by-product of soap manufacturing and is a clear, syrupy liquid, usually derived from vegetable oil and obtained by adding alkalies to fats and fixed oils. It is a solvent humectant and emollient in many skin care products, as it absorbs moisture from the air and thereby helps products retain their moisture. It improves the spreadability of products and has definite skin moisturizing benefits.
Propylene Glycol is a common moisture carrying ingredient in skin care. It acts as a humectant by absorbing water from the air. It penetrates the upper layers of the skin well and leaves a nice feel.
Known for its affinity with skin and its powerful ability to improve the appearance of skin aging. 10.5% of Pure Vitamin C (L-Ascorbic Acid) is the key ingredient in the Kiehl’s Dermatologist Solutions product Powerful-Strength Line-Reducing Concentrate.
This skin treatment, containing 10.5% Pure Vitamin C, has been clinically demonstrated* to improve skin texture and radiance, as well as reduce the appearance of lines and wrinkles.* Based upon results shown in a dermatologist-controlled study.
Cleanse skin thoroughly prior to application. Apply over entire face twice daily (avoiding the eye area). Can be used alone or layered under your usual moisturizer. In case of contact with eyes, rinse thoroughly. As the formula blends into the skin, you may experience a feeling of warmth. This sensation is normal.