What are “lutein esters?” Are they the same as purified lutein?
Lutein esters are sometimes used in products in place of purified lutein. Lutein esters are chemically different from lutein, and they require enzymatic digestion in the small intestine to allow any lutein to be taken up by the body. Purified lutein is absorbed directly by the body without the need for enzymatic digestion. Products containing lutein esters should identify them as such on the ingredient list or supplement facts panel.
