Stretch Marks

Stretch marks (striae distensae/striae gravidarum)—those linear scars in pink, red, purple, or eventually white/silver—affect 50-90% of pregnant women and many individuals during rapid weight gain, growth spurts, or bodybuilding. They form when skin stretches beyond its elastic capacity, causing dermal collagen and elastin fibers to rupture, leaving permanent scarring in the deeper skin layers. The biology is clear but discouraging for those seeking cures: once collagen fibers tear, they don’t fully regenerate—they form scar tissue. Early stretch marks (striae rubrae, red/purple) are inflamed and actively forming. Mature stretch marks (striae albae, white/silver) are healed scars with permanent collagen disruption. No topical cream or supplement eliminates mature stretch marks, despite marketing claims. However, prevention is highly effective—supplements that increase skin elasticity, hydration, and collagen tensile strength reduce stretch mark formation by 20-40% when started early in pregnancy or before rapid weight changes.