Raab MSM with Willow Bark Extract capsules contain organic sulfur (MSM), vitamin C and premium willow bark extract with normalized salicin content. In the human body, organic sulfur is an essential component of many structures and molecules, such as neurotransmitters, proteins, muscle tissues, skin, bones and cartilage. Vegan product. Instructions for use: Take 3 capsules a day during meals with plenty of water.