Affiliate disclosure

The short version

StaminaStack is reader-supported. When you buy a product through a link on this site, we may earn a commission from the retailer — at no extra cost to you. That commission income is how the site pays for research and medical review. It never decides what we recommend: rankings follow the evidence and our product criteria, and products we advise against appear here with no buy links at all.

Programs we participate in

• Amazon Associates (US and UK): As an Amazon Associate I earn from qualifying purchases.
• iHerb (via the Awin network): product links to iHerb are tracked through Awin and may earn a commission on completed orders.
• Brand-direct programs: some manufacturers (for example Thorne, Transparent Labs, and Onnit) run their own affiliate programs with their own terms.
• Display advertising: informational pages may carry display ads (Google AdSense). Money pages — the guides with product tables — are kept ad-light on purpose so ads never compete with the recommendations.

Affiliate links carry a tracking code so the retailer can attribute a sale to this site; that is how the commission is earned and how the retailer knows the order arrived. What those links and cookies collect is covered in the privacy policy.

Rankings are not for sale

No brand can pay to be included in a guide, to be ranked higher, to have a competitor removed, or to soften a conclusion. We accept no placement fees, no pay-for-review arrangements, and no free-product deals that carry a coverage condition — a product sent for assessment is judged by the same product criteria as one we bought, and most fail the label-dose test anyway. If a page ever carries sponsored content, it will be labelled as advertising in plain language and will never be presented as a review or a ranking. Where commissions differ between retailers, the recommendation does not: we routinely link to the same product at more than one retailer, including the one that pays us least.

Why we never print prices

Prices on this site are deliberately absent. Supplement prices change constantly — sometimes daily — and a printed price is a wrong price waiting to mislead someone. Amazon's program rules also prohibit hard-coded prices in Associates content. So our tables show the product, the form, the study-matched dose, and its testing status, and the button takes you to the retailer's live price. Any price you see after clicking belongs to that retailer, shown with its own timestamp — never to us.

Our link rules

• Affiliate links are marked sponsored / nofollow and sit next to a disclosure banner on every page that carries them.
• We never publish personal rewards or referral codes — on some programs they would void the commission and breach the terms, and they have no place in a review either way.
• Nobody here buys the products we recommend for ourselves through our own links, and friends-and-family orders through our links are against program rules — please don't.

FTC compliance

This disclosure is provided in accordance with the United States Federal Trade Commission's guidelines on endorsements and testimonials (16 CFR Part 255). Material connections between StaminaStack and the retailers linked from this site are disclosed here and in the banner on every page containing affiliate links.