Seaweed Purifying Detox Peel Off Mask. Collagen Alginate, Beta Carotene, Iodine, Magnesium,Potassium, Zinc Seaweed makes the skin healthier and more vibrant-looking, because of the natural vitamins and minerals it contains. Seaweed also contains the phytonutrient beta carotene, which is an antioxidant essential for the body to maintain healthy tissues. Beta carotene helps stimulate the flow of blood near the surface of the skin, resulting in a softer, smoother and healthier appearance. Seaweed is rich in vitamins A, B1, B2, B3, B6, B12, C, E, K, folic acid, niacin and pantothenic acid.