GT Flex 4mg Tablets (30) contain glucosamine sulfate, which is commonly used to support joint health, particularly for managing osteoarthritis. Glucosamine is a naturally occurring substance in the body that helps maintain the cartilage in joints. The 4mg dosage in each tablet helps support joint mobility, reduce pain, and improve overall joint function. The product comes in a pack of 30 tablets, providing a month-long supply for individuals seeking to manage joint discomfort or support joint health.