Sodium Tocopheryl Phosplate (trade name: TPNa) is a new and notable agent for cosmetic applications from Showa Denko. Billed as the world’s first water-soluble vitamin E, it is ideal for skin care and makeup formulations and is effective on dry skin, acne and anti-aging issues.   According to the company, TPNa is unique and typical for increasing the cuticle moisture content with in a short period, where we found a significant enhancement on the expression of serine palmitoyltransferase closel...