What earns a place?
We looked at 14 products across five categories. Seven are on the shortlist. We still need to confirm label details for two of the others. We haven’t compared every brand.
You can compare what each creatine certification covers or choose casein by flavor, preparation and tub size. Whey, electrolyte sticks and magnesium capsules have one buying option each.
- Ingredients and amounts: We check the brand’s label for ingredients, serving size, flavor and package size. We leave a product off the shortlist if those details conflict or we can’t read them. Sources and check dates are shown.
- A reason to choose it: A smaller tub, no added flavor or a sport certification can help you choose. We explain what the certification covers and how the products differ. More sodium, more protein or fewer ingredients does not automatically make one better.
- Links you can check: Amazon links must match the exact product shown. Otherwise we use the brand’s site. Certifications link to the certifier’s records, and allergy warnings stay beside the product. Leaving a brand off the shortlist does not mean it is unsafe or poor quality.
How the guides are put together
We use health-agency guidance, published research and official product information to write these guides. AI helps with research and drafting. Sources are linked beside the information they support.
The content-check date shows when we checked the page against its sources. It does not mean a doctor reviewed the page. Product labels, retailer links and certifications have separate check dates.
We haven’t tried these products, rated their taste or compared current retailer prices. The seven picks came first; we looked at other products afterward. Whey, electrolytes and magnesium still have one pick each. Other brands may suit your preferences just as well.
What happens when something changes?
We check sources manually. A new safety notice, an important study, a changed label or a reported mistake can prompt another look. We also check before adding a product or changing a recommendation.
- We open the original source and check its date, who was studied and what was measured. A product label can confirm ingredients, but it cannot prove a health benefit.
- The flavor, size and formula have to match. We check a certification in the certifier’s directory rather than relying on a retailer page alone.
- We correct or remove claims the source no longer supports. A product stays off the buying list while its label details conflict or remain unclear.
- We date the content, label, retailer or certification check we actually finished and record important changes below. Fixing a typo or layout does not change a source-check date.
Found a mistake?
Tell us if an amount looks wrong, a source is out of date or a buying link opens a different product. Send the page address, what needs checking and a source link or photo of the current label. Please leave out personal medical details.
We check reports against the original source and the exact product version. Important corrections go in the update log. We won’t publish your name or email without permission.
Recent updates
Here’s what we’ve changed and where to find it.
Added notes on 14 products we considered, including alternatives to the seven already on the shortlist. Kaged Casein and Liquid I.V. Hydration Multiplier (electrolytes) still need complete label checks, so they have no buying links. There were no gummies in this review.
Added the 2023 whey-and-casein study, who took part and what the results can tell us. Explained magnesium forms, elemental amounts and what we know about sleep claims.
Added a privacy notice explaining searches, saved data and links to other sites. This page now explains how we recheck sources and handle corrections.
How the site earns money
Amazon links are paid links. We may earn a commission from a qualifying purchase. Links to the manufacturer’s product information are separate, so you can check the label without following a buying link.
We apply the same label and source checks to every brand. We link to the manufacturer when we can’t confirm the exact version on Amazon. You buy from the retailer; there is no checkout here.
Looking for gummies?
Gummies are not on the shortlist yet. The guides explain serving sizes and ingredients so you know what to look for.
Questions about your health?
The guides explain ingredients and shopping differences. Ask your doctor or pharmacist about medicines, health conditions or whether a supplement is appropriate for you.
Sources: NIH: Supplement basics