Free Form. Detoxifying Antioxidant. Gluten Wheat & Dairy Free. Suitable for Vegetarians. L-Methionine is an essential amino acid that acts as an antioxidant. The body is able to convert methionine to cysteine which acts as a precursor to the detoxifying antioxidant L-Glutathione. Methionine is also lipotropic helping to support fat metabolism. This formulation provides Free Form L-Methionine to promote optimal absorption and assimilation.