One of the original “Solaray Products” – an Sp Herb Blend containing key herbs and specially selected homeopathic cell salts formulated for specific health benefits – Skin Blend Sp-4 is formulated to help support healthy skin and a youthful appearance.Our powerful formula includes a proprietary blend of burdock root, gotu kola, yellowdock, dandelion, milk thistle, irish moss, red clover, cayenne, kelp, and sarsaparilla. Believed to work better together in a blend, these powerful herbs contain antioxidants and plant compounds like terpenoids and sarsaponin that may help support collagen production, skin cell production, circulation, and overall skin appearance. We ve also included cell salt nutrients designed to work synergistically with the herbs in our Skin Blend.