Every figure is the cost of 10 g of collagen peptides as the product's own Supplement Facts panel prints them in its ingredient line, not per scoop, not per tub, and not the protein figure printed beside it, which on most of these labels is a gram or two lower. Prices are before delivery; each product page says whether its retailer publishes a delivery rate. 3 products we track have no current price at the retailers we read. 5 have a price, but their panels state no collagen amount to price 10 g against. These 8 are not ranked here.
The pick is the cheapest certified product, at the exact package sold where the certifier names packages, with no adverse finding on record, a price its retailer let us read recently, and no more than a year’s supply at the label’s serving; 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 answer shown beside it is the cheapest under a different rule and says so on its own line; answers that cost more than the pick fold under one line until you ask for them.
Our pick, delivery included · Cheapest independently tested, delivery known
Among 33 products and 33 retailer listings we track; Amazon and Walmart are not included. A month is thirty doses of the size in the heading, priced the same way as the per-dose figure beside it. “Delivery known” ranks only products whose retailer publishes a delivery rate; a cheaper product with an unpublished rate is on its own line, or in the full list below.
What this rests on: prices we last recorded at the retailer named on each product page, which go stale, and each page says when it was checked; the products we track, not every product sold, and Amazon and Walmart are not among the stores; listings and labels read at the source, each linked from the page. Found an error? Tell us. The full method: How we compare.