Most melanomas occur on body parts that rarely see the sun This alone should make you pause. If full spectrum sunlight were the primary culprit, you’d expect the highest melanoma rates on chronically sun exposed areas like the face, neck, and forearms Instead, melanomas overwhelmingly appear on the trunk, thighs, and other typically covered areas That pattern doesn’t scream UV causation, it points to something deeper, like systemic chronic circadian and metabolic dysfunction