Ascorbyl Tetraisopalmitate (ATI) is a stable, oil-soluble derivative of Vitamin C, commonly used in skincare and sunscreen products due to its antioxidant and skin-brightening properties. Here’s how it applies in sunscreen products:
1. Antioxidant Protection:
Ascorbyl Tetraisopalmitate functions as a potent antioxidant. It helps neutralize free radicals generated by UV radiation and environmental stressors. Free radicals can lead to skin damage, premature aging, and inflammation. By scavenging these radicals, Ascorbyl Tetraisopalmitate helps protect the skin from oxidative damage, which is especially important in sunscreens to support the primary defense against UV exposure.
2. Enhancing Sun Protection:
Ascorbyl Tetraisopalmitate can contribute to sun protection beyond just UV filters. It assists in the stabilization of sunscreen formulas and boosts the efficacy of UV filters by reducing oxidative stress that can degrade sunscreen actives. Some studies suggest that Ascorbyl Tetraisopalmitate may provide additional protection against UV-induced skin damage.
3. Skin Brightening and Anti-aging Effects:
Vitamin C derivatives like Ascorbyl Tetraisopalmitate are known for their ability to inhibit melanin production, reducing hyperpigmentation, dark spots, and uneven skin tone. In sunscreen products, Ascorbyl Tetraisopalmitate can help address the skin discoloration that may arise from prolonged sun exposure. It also aids in collagen synthesis, potentially reducing the appearance of fine lines and wrinkles.
4. Stability and Compatibility:
Since Ascorbyl Tetraisopalmitate is oil-soluble, it is well-suited for formulation in oil-based sunscreens or hybrid sunscreens that combine both oil and water. Unlike L-ascorbic acid (the pure form of Vitamin C), Ascorbyl Tetraisopalmitate is more stable, especially when exposed to air and light, ensuring prolonged efficacy in sunscreen products.
5. Improved Skin Penetration:
As an oil-soluble compound, Ascorbyl Tetraisopalmitate is able to penetrate the skin barrier more effectively than water-soluble forms of Vitamin C. This enhances its effectiveness in providing antioxidant protection and improving skin texture over time.
Conclusion:
In sunscreens, Ascorbyl Tetraisopalmitate serves not only as a protective antioxidant but also helps brighten the skin and reduce signs of aging caused by UV exposure. Its stability, enhanced skin penetration, and synergy with other sunscreen actives make it a valuable addition to sun care products.