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GUANINE

Description

Guanine is a naturally occurring nucleobase found in DNA and RNA, but it also serves a unique purpose in cosmetic formulations. This crystalline substance, derived from fish scales or synthesized in laboratories, is prized for its light-reflective properties. In skincare and cosmetic products, guanine functions as a pearlescent agent, imparting a lustrous, shimmering effect to formulations.

The reflective qualities of guanine stem from its flat, plate-like crystal structure, which effectively scatters light to create a soft, iridescent glow. This characteristic makes it particularly valuable in products designed to enhance skin radiance or provide a subtle highlighting effect. Guanine is commonly used in foundations, highlighters, eyeshadows, and other color cosmetics to achieve a natural-looking luminosity.

From a formulation standpoint, guanine is often preferred over synthetic pearl agents due to its biodegradability and natural origin. It is generally well-tolerated by most skin types and is considered safe for use in cosmetics. However, as with any ingredient, patch testing is recommended for individuals with sensitive skin or known allergies. Guanine's stability in various pH ranges and compatibility with many cosmetic ingredients make it a versatile option for formulators seeking to create products with a sophisticated, light-reflective finish.