20/20 did a hidden camera investigation for 3 months, going to Mannatech sales pitches around the country. The meetings start with disclaimers that the products don’t cure anything. Yet the meetings are full of testimonials from people who claim they were cured by Mannatech products. Claims are also made that the product is a bigger breakthrough than even penicillin.
Mannatech products are only sold through a multi-level marketing (MLM) plan.