[glenra]

I'm distinguishing "unsafe" from "doesn't work". Having "just a fraction of the ingredient on the labels", even if true, doesn't automatically make a product "clearly not safe".

The study referenced in the Forbes article doesn't say how it picked which 44 products to study, which seems to be key to the question at hand. Was it a random sample? Was it a sample they had prior reason to suspect? Only if they'd picked products from the shelves of a specific retailer would it be a test of a retailer's selection acumen. (The fact that a product is available from somebody somewhere doesn't mean you're likely to encounter it.)

They also don't tell us which specific products were good or had problems so there's no way for a 3rd party to check their results. (Was that the intent? Given 2 companies were absolutely reliable, why not at least tell us which 2 companies they were?)

Dietary supplements often get recalled despite being ridiculously safe. If the FDA gets more than a certain number of adverse reports they have no incentive to consider how popular the product is and do a cost-benefit analysis; as far as they're concerned the "benefit" of a popular product counts as zero so any measurable risk is too high.

Weight loss supplements are particularly prone to being recalled due to risk levels that aren't at all out of line with the potential benefit.