The cheapest dose you can trust
What a supplement actually costs per dose, with delivery counted wherever the retailer publishes a rate. Every certification here was checked against the certifier's own database, not the badge on the bottle.
Prices last checked Oct 16.
Checked in each certifier’s own database. NSF has to name this exact package size, so a listing for another size does not count. USP has to list the product, with its mark on this label. Informed Sport, Informed Choice and IFOS list a product rather than a size, so every size of a listed product counts. The product page explains what each program tests.
Both screen for substances banned in sport. NSF has to name this exact package; Informed Sport lists the product, so every size counts.
The cheapest per dose of everything we track, with delivery counted where the retailer publishes a rate. A month here means thirty doses. It is a way to compare prices, not a recommendation about what to take.
Price moves
A move of 10% or more in the last 14 days, or a price at its lowest in our records. The same notes the category tables carry.
Categories
One compound, sold by many brands. On a pure monohydrate the serving and the creatine in it are the same number, which makes this the one category where a like-for-like price is easy to get at.
Sold as six different salts, which are not interchangeable. Each is compared separately on elemental magnesium.
Sold plain and sold with vitamin K2 added. Each class is compared separately, on D3 content only, and within labeled strength bands.
Sold as fish oil, algal oil and krill oil. Each is compared separately, on the combined EPA and DHA its own label states, never on total oil.
Scoops are not the same size from one brand to the next, so a price per scoop or per tub compares nothing. Every whey here is priced on the protein its own label states per serving.
From any plant source or a blend of them. Every one here is priced on the grams of protein its own label states per serving, not per scoop or per tub.
Hydrolyzed collagen sold by the scoop, and the scoops are not the same size from one brand to the next. Every product here is priced per 10 g of collagen peptides as its own panel prints them, whatever the scoop, the source animal or the tub.
Vitamin B12 is sold in several forms, each named on its own Supplement Facts panel. Each form we price is compared on its own, per 1,000 mcg of B12, within labeled strength bands.
Zinc is sold as several salts, each named on its own Supplement Facts panel. Each is compared separately, per 15 mg of elemental zinc as the panel prints it.
Coming next: Electrolytes, Melatonin, Iron. Each arrives when we can check its prices and certifications ourselves.
Questions
113 questions answered from the labels and the prices, recomputed every time the site is built. Where the answer is “we do not know”, it says so.
Creatine Monohydrate 18 · Magnesium 18 · Vitamin D3 10 · Omega-3 11 · Whey Protein 9 · Plant Protein 9 · Collagen Peptides 10 · Vitamin B12 5 · Zinc 9 · every question on one page
Every package NSF Certified for Sport actually names with the certificate numbers, and the packages whose listing names a different size
We keep three questions separate: whether an ingredient has evidence behind it, whether a particular product is what it says it is, and what the cheapest way to get a real dose actually costs.
Nine categories so far, 385 real products from 24 brands. We add the next category only when we can check its prices and its certifications ourselves, so this list grows slowly on purpose.