There are scant data on how often doctors sell products as part of an MLM program, but MedPage Today found several examples where doctors were involved, suggesting the practice isn't uncommon.

The goal of an MLM program is to sell products. Be careful if you’re required to pay a buy-in to participate in the program, even if the buy-in is a nominal one-time or recurring fee.

Dozens of multilevel marketing companies based largely in Salt Lake and Utah counties directly employ as many as 14,000 or so people and indirectly employ thousands more through suppliers ...