... lack of collagenHealthy & Perfect skin tissue Unhealthy skin tissue(White, smooth, solid, moist) (Dark, fine lines, loose, dry, etc.)Kailei Line ... . It does not contain any impurities. It is as smooth and soft as the pilled eggs and it is crystal and clear ... nutrient uptake of eyes part3. Enable the eyes to keep smooth and elastic, and remove the black eye circleIngredientshydrogel, Collagen, natural ...