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PABA

Description

PABA, or para-aminobenzoic acid, is an organic compound historically used as a UV filter in sunscreens and cosmetics. It belongs to the family of aminobenzoic acids and is known for its ability to absorb ultraviolet B (UVB) radiation. PABA was one of the first chemical sunscreen ingredients widely used to protect skin from sun damage.

Despite its effectiveness in blocking UVB rays, PABA has fallen out of favor in modern skincare formulations due to several concerns. It has been associated with allergic reactions and skin irritation in some individuals. Additionally, PABA can stain clothing and may increase photosensitivity in certain people. These issues have led to its replacement by more stable and less problematic UV filters.

PABA is also recognized as a essential nutrient, playing a role in the synthesis of folic acid within the body. It occurs naturally in some foods and can be produced by intestinal bacteria. While topical application for sun protection has declined, PABA continues to be studied for potential benefits in other areas of health and medicine. Its use in cosmetics and sunscreens is now limited, with many products marketed as "PABA-free" to address consumer concerns.