Across the 36 powders of collagen peptides we track and can price, 10 g costs between $0.379 and $2.20, before delivery. The median is $0.883, and the most expensive costs 5.8× the cheapest.
We price one product in capsules, softgels or tablets: BulkSupplements.com Marine Collagen (Fish) Capsules (300 capsules), at $1.40 per 10 g, before delivery.
Capsules (with softgels and tablets) and powders are priced as two ranges, never one.
The brand, the package size and the format move the price. A bag sold by the pound, a box of single-serve packets and a bottle of capsules are different purchases: packets are priced with the powders they hold, and capsules as their own range. Every figure counts grams of collagen, not scoops. The cheapest row is a price, not a recommendation. Every figure is per 10 g as each product's Supplement Facts panel (or, where a size has none published, another size's panel from the same line) states it, before delivery; each product page says whether its retailer publishes a delivery rate.
10 g is the unit this site prices collagen peptides against, so that packages of different strengths and forms can be compared at all; it is not a recommendation about what to take. Ranked cheapest first, with which packages a certifier names: What is the cheapest collagen peptides powder?
Where to buy: the collagen peptides shortlist
The pick is the cheapest product that clears four bars:
certified, and named at the exact package where the certifier names packages
no adverse finding on record
a price its retailer let us read recently
no more than a year’s supply at the label’s serving
It is ranked per delivered dose where the retailer publishes a delivery rate. Where none does, it is the cheapest such product before delivery, and it says how far the order is from free delivery. It is the same pick the category page shows. Any other answer beside it is the cheapest under a different rule, and its own line names that rule. Answers that cost more than the pick are folded into one line until you open it.
Among 44 products and 44 retailer listings we track; Amazon and Walmart are not included. A month is thirty doses of 10g, priced the same way as the figure beside it. It is worked out before that figure is rounded, so it can differ from thirty times it by a few cents. It is not thirty servings where a serving holds more or less than 10g. “Delivery known” ranks only products whose retailer publishes a delivery rate. A cheaper tested product whose rate is not published gets a line of its own. Every package we price, with its delivery terms, is on the Collagen Peptides page.
Capsules, softgels and tablets
No pick yet. This came closest
A pick has to clear four bars:
independently certified, and named at the exact package where the certifier names packages
no recall or failed test
a price its retailer let us read recently
no more than a year’s supply at the label’s serving
Where the retailer publishes no delivery rate, the pick is priced before delivery and says so. Nothing we track here clears all of those yet. This one misses at least one bar, and says which:
What this rests on: Prices are the last ones we recorded at the retailer named on each product page. Prices go stale, so each page says when it was checked. We track some products, not every one sold, and Amazon and Walmart are not among our stores. Listings and labels are read at the source, and each page links to them. Found an error? Tell us. The full method: How we compare.