Buying guides · United States

Before you buy, check here.

We read the lab tests, the certifier databases and the labels, then tell you which products pass. Brands can’t pay for a pass or a rank.

Protein powder

We checked 16 protein powders sold in the US. Five pass. None are plant-based.

Creatine

We checked 12 creatines sold in the US. Here’s which one to buy.

Blood tests

We checked 10 longevity tests sold in the US. Here’s what’s worth paying for.

GLP-1 drugs

GLP-1s, decoded: which are FDA-approved, what they cost in the US, and what the label actually says.

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