Recently I have noticed an increase of supplement websites that also have Pay Per Click ads running on thier pages. This should be your instant clue that the site is not worth your time.
I mean, come on... why would any self respecting, successful site want to run ads that compete with thier own products? I'll tell you why- they don't care much about what they have to sell. They hope you will click the ads, which generates income for them (and they never have to ship a thing).
Several of these sites attempt to trick you into thinking that they are sites that "review" products. Yeah, these "reviews" are about as authentic and trustworthy as those that come in your daily spam emails.
You click the link to the product in the "review", and the site host collects referral fees.
Be a smart shopper. Don't fall for the scam.