This serum targets multiple steps in the melanin production pathway rather than just one. Glutathione inhibits the activity of tyrosinase, the enzyme responsible for triggering melanin synthesis, while licorice root extract helps block pigment transfer to surface skin cells. Together with antioxidants like ascorbic acid and tocopherol, which neutralize UV-induced oxidative stress that triggers pigmentation in the first place, the formula addresses discoloration from several angles at once.

The formula contains ascorbic acid, which is the direct, active form of vitamin C. Ascorbic acid inhibits melanin synthesis and helps neutralize free radicals that accelerate skin aging and uneven tone. Because it is the bioavailable form, it does not require conversion by the skin before it becomes active.

The formula contains retinyl palmitate, which is a vitamin A ester. Retinyl palmitate is a gentler, more stable form of vitamin A than retinol and is converted by the skin into an active form, making it well suited for daily use. It contributes to cell turnover and supports the overall brightening and smoothing effects of this serum.

The formula is designed for daily morning and evening use and relies heavily on antioxidants, barrier lipids, and hydrating agents rather than high-percentage exfoliating acids, which makes it a more approachable option for skin that tends to react. The inclusion of ceramide NP, cholesterol, and polyquaternium-51 helps maintain barrier integrity while the brightening actives work. That said, every skin is different, and if you are unsure whether this serum is appropriate for your sensitivity level, a free skincare consultation with one of our estheticians can help you decide.

Niacinamide is a well-studied form of vitamin B3 that interferes with the transfer of melanin-containing vesicles (melanosomes) from pigment-producing cells to surrounding skin cells. This mechanism helps reduce the visible accumulation of pigment at the skin's surface. Niacinamide also supports barrier function and helps skin tolerate other active ingredients in the routine.

Ceramide NP and cholesterol are two of the three core lipids that make up the skin's natural barrier matrix. Their presence in this formula helps replenish lipids that are depleted by environmental exposure, aging, or over-cleansing. A stronger lipid barrier means less moisture loss, better tolerance for active ingredients, and more resilient skin overall.

Yes, daily SPF use is essential when using this serum. UV exposure is one of the primary triggers for melanin overproduction, and brightening actives like ascorbic acid and glutathione work to slow that process from the inside. Without SPF protection, sun exposure will continue to stimulate pigmentation faster than the serum can address it. Apply a broad-spectrum SPF over your moisturizer every morning as the final step.

Art of Skin Care is an authorized retailer of Dr. esthé, so every product you receive is 100% authentic, sourced directly through official brand channels and never from third-party resellers. Our team is made up of licensed, acne-certified estheticians who hand-select the products we carry based on real skin science and professional results. We don't just sell skincare; we understand it. Not sure if Dr. esthé Whitening A Serum is right for your skin? Get a free skincare consultation and one of our estheticians will personally guide you.