Just a simple question from an avid subscriber. Is the homocysteine in this article the same as the l-cysteine or acetyl-l-cysteine that people take for health reasons in pill form?

Paul A. Pagnato
McLean, Va.

L-cysteine and acetyl-l-cysteine are quite different from homocysteine. l-cysteine is a detoxifying agent and free radical scavenger that’s the mirror image of the amino acid cysteine.