Lamberts liquid cherry concentrate formerly toetal 500ml liquid is a sour cherry concentrate with red grape and apple research on sour cherries not to be confused with sweet cherries through the 1990s has identified the antioxidant properties of this fruit the active antioxidants in sour cherries include eight compounds polyphenolic compounds including anthocyanidins and quercetin anthocyanidins have both antioxidant properties as well as acting as an anti inflammatory further studie