Scientists have identified several innovative compounds that work to provide safe, effective, fast-acting support for aging joints. These novel compounds are combined in Life Extension Fast-Acting Joint Formula, a one-a-day formulation designed to promote joint comfort in days, rather than weeks or months. Just one capsule gives you 300 mg of solubilized keratin, a bioactive form of keratin protein that supplies cysteine and other high-sulfur precursors needed to support vital joint tissue; 200 mg of Decursinol-50, a fast-acting herbal extract; and 40 mg of Hyal-Joint, a form of hyaluronic acid that supports the synovial fluid that cushions joint cartilage.