Body Fat Level Veins (vascularity) show more when body fat is low (usually under 8%, and for extreme detail 56%). The leaner you stay, the sharper the veins pop Body Fat Level, Veins (vascularity) show more when body fat is low (usually under 8%, and for extreme detail 56%)., The leaner you stay, the sharper the veins pop out., Muscle Mass, Efficacy of L carnitine supplementation for improving lean body mass and physical function in patients on hemodialysis: a randomized controlled trial European Journal of Clinical Nutrition Revisiting the Role of Carnitine in Heart Disease Through the Lens of the Gut Microbiota