Denosyl is a daily supplement that helps support proper liver function. Support of a compromised liver, regardless of the cause, is essential if function is to be improved. Denosyl has not only been shown to markedly increase glutathione levels in the livers of dogs and cats, but to go far beyond that. Denosyl has been shown to protect liver cells from cell death and may be useful in cell repair and healing. Its main ingredient is S-Adenosyl methionine (SAMe).