*[http://www.mlmwatch.org/04C/Mannatech/sham.html Stephen Barrett, ''Experts Dissect Mannatech Claims'' - MLMwatch - The Skeptical Guide to Multilevel Marketing] | *[http://www.mlmwatch.org/04C/Mannatech/sham.html Stephen Barrett, ''Experts Dissect Mannatech Claims'' - MLMwatch - The Skeptical Guide to Multilevel Marketing] |