Collagen Labels: Source, Formula, and Testing

A collagen tub carries three kinds of information that are easy to blur together: the Supplement Facts panel, the marketing text around it, and testing marks. Each answers a different question, and only the first follows a fixed federal format. This guide reads all three, using the published labels of three unflavored collagen powders as examples.

Start with the Supplement Facts panel

A dietary supplement label must include a Supplement Facts panel that lists the serving size and the number of servings per container ^{Source [1]}. Ingredients without an established Daily Value, such as collagen peptides, are listed by name with an amount per serving and a symbol pointing to "Daily Value not established". The panel may also name the source of an ingredient, and non-dietary ingredients go in a separate ingredient statement below it ^{Source [2]}.

The three labels we read show how much the details vary. One lists 20 g of collagen peptides "from bovine" in a 4-tablespoon serving ^{Source [3]}. Another lists 20 g "from bovine" in two scoops ^{Source [4]}. The third lists 12 g "from Alaskan Pollock" in one scoop ^{Source [5]}. Compare grams of collagen per serving, not scoops, and note that the protein line is a separate figure: all three panels list slightly fewer grams of protein than grams of collagen peptides, without explaining the difference.

Source: bovine, marine, porcine, or chicken

Hydrolyzed collagen is made mainly from bovine and porcine material, and also from fish skin, scales and bones, and from chicken. Its properties, such as peptide size and solubility, depend on the source and the extraction process, and religious considerations can rule out some sources for some buyers ^{Source [6]}.

Source also matters for allergies. Fish is one of the nine major food allergens, the labeling rules apply to dietary supplements, and the type of fish must be named ^{Source [7]}. The marine powder we read states "Contains: fish (Alaskan pollock)" ^{Source [5]}. One bovine label adds that it is made in a facility that also processes milk and fish ^{Source [3]}.

"Grass-fed" appears in the marketing text of both bovine product pages, and one also says "pasture-raised". These descriptions are not part of the Supplement Facts panel, and neither page links a document that supports them.

What "types I and III" means

About 28 types of collagen are known. Type I is the most common in skin, bone and tendon, type II is found in cartilage, and type III is common in skin, muscle and blood vessels ^{Source [6]}. A "types I and III" statement describes the starting material.

Two of the three pages we read make this claim, in a page FAQ or product description rather than in the Supplement Facts panel, and neither links an analysis supporting it ^{Source [3] Source [5]}. The third page does not state collagen types at all. A missing type claim is not a defect; it is simply one less thing to verify.

Supplement Facts versus marketing claims

Statements such as "supports healthy hair, skin, nails, bones and joints" are structure/function claims. FDA does not pre-approve them; the company must notify FDA within 30 days of marketing the claim, and the label must say FDA has not evaluated it and that the product is not intended to diagnose, treat, cure or prevent any disease ^{Source [8]}. The company is also expected to have substantiation that the claim is truthful and not misleading ^{Source [1]}.

Comparative claims deserve the same scrutiny. One page says its powder "dissolves 2x faster than leading brands" and, in a customer Q&A, gives an average molecular weight of about 5,000 daltons ^{Source [4]}. Another says its marine collagen is "more bioavailable" than bovine collagen and explains in a footnote that bioavailability is influenced by molecular weight ^{Source [5]}. Hydrolyzed collagen in general falls in a range of roughly 3 to 6 kilodaltons ^{Source [6]}. A molecular-weight figure is useful context, but it is not a measurement of absorption in people, and neither claim links a study.

Testing claims and how to check them

FDA does not test dietary supplements before they are sold, and manufacturers and distributors are responsible for making sure their products are safe ^{Source [1]}. That leaves testing claims to the company and to independent certifiers, and the marks do not all mean the same thing.

The "Non-GMO Tested" mark from the IGEN program verifies claims about genetically modified material; the program page does not describe contaminant testing ^{Source [9]}. All three products we read show that mark on their product pages or label images. NSF says its Certified for Sport program checks that contents match the label, screens for more than 270 substances banned in sport, checks for unsafe levels of contaminants, and audits the manufacturing facility ^{Source [10]}.

None of the three product pages publishes heavy-metal results or limits as of Oct 18, 2026. One says its products are "rigorously tested by an independent third-party lab", naming only non-GMO testing ^{Source [4]}.

To check a certification, search the certifier's own registry rather than relying on a logo. Match the brand, the product name, the flavor and the package size. NSF's Certified for Sport registry, for example, lists the unflavored version of one of our three products by name, with the package sizes and serving size it covers ^{Source [11]}. A listing for one flavor or formula does not cover another. Our guides to third-party testing claims and certificates of analysis go further.

A short label checklist

• Grams of collagen per serving, and the serving size in grams.
• The source animal, and any allergen statement.
• Other ingredients, including flavors or added vitamins.
• Which claims sit in the Supplement Facts panel, and which only in marketing text.
• Any certification, confirmed in the certifier's registry for that exact product.
• The returns policy, read before you buy.

For how these points play out across three real products, see our collagen comparison.