New size, twice as much! MSM & C Serum is a synergistic combination of Vitamin C, MSM, and sulfur, coupled with the soothing and moisturizing effects of aloe Vera. MSM, a safe, natural, and readily absorbed mineral derived from the ocean and found in many raw foods, performs highly important functions. It enhances tissue pliability and encourages the repair of damaged skin. Lastly, sulfur is essential for making collagen, the substance that binds all structures of skin together.