Psoriasis patients whose healed skin had higher levels of oleic acid (a fatty acid) showed lower inflammatory immune responses when their skin cells were tested. The study suggests that the fatty acid composition in your skin's outer layer directly influences whether dormant psoriasis-causing T cells stay calm or flare up—meaning oleic acid might help keep resolved psoriasis from coming back.

Researchers analyzed the fatty acid composition in skin samples from psoriasis patients using lab testing, then activated immune cells from those same skin samples to measure inflammatory markers and gene activity.

Funding not disclosed in abstract