Fatty15 is the official site for a science-backed, patented nutritional supplement containing pure pentadecanoic acid (C15:0), designed to promote long-term cellular health, longevity, and metabolic function. Developed by Seraphina Therapeutics and founded by Dr. Stephanie Venn-Watson, it is marketed as the first essential fatty acid discovered in 90 years, focusing on strengthening cell membranes to combat aging.