Not All Collagen Is Made the Same: What to Look for in a Collagen Supplement

Not All Collagen Is Made the Same: What to Look for in a Collagen Supplement

Collagen supplements have become increasingly familiar, appearing in everything from powders and drinks to capsules and beauty products. At first glance, many collagen products can look remarkably similar. Two tubs may both contain “collagen peptides”, provide a similar number of grams per serving and make similar references to skin, joints or general wellbeing. However, looking beyond the front of the packaging reveals that collagen products can differ considerably.

The source of the collagen, how it has been processed, its peptide profile, the collagen types present, additional ingredients and manufacturing standards can all vary. In other words, not all collagen is made the same. Understanding these differences can help consumers make a more informed comparison rather than choosing a product based solely on the number of grams listed on the label.

What exactly is collagen?

Collagen is a structural protein naturally found throughout the body, including in connective tissues such as skin, tendons, cartilage and bone. There are numerous types of collagen, although Types I, II and III are among the most commonly discussed in nutrition and supplements. Collagen supplements are generally produced from animal-derived sources. These commonly include bovine collagen and marine collagen. The source matters because different tissues contain different proportions of collagen types and can result in products with different characteristics.

Collagen versus collagen peptides

One of the first distinctions to understand is the difference between intact collagen and hydrolysed collagen peptides. Native collagen consists of large protein structures. To create the collagen peptides commonly found in supplements, collagen undergoes a process known as hydrolysis. Hydrolysis breaks the larger collagen protein into shorter chains of amino acids known as peptides. This process also improves properties such as solubility, making collagen peptides easier to incorporate into products such as powders and drinks. You may therefore see terms including:

• hydrolysed collagen

• collagen hydrolysate

• collagen peptides

These generally describe collagen that has been broken down into smaller peptide chains. However, even products carrying the same description can differ in their peptide composition.

The source of collagen can differ

One of the clearest differences between products is where the collagen originates.

Bovine collagen: Bovine collagen is derived from cattle and is typically associated with Type I and Type III collagen. It is one of the most widely used sources of collagen peptides and is commonly available as an unflavoured powder.

Marine collagen : Marine collagen is usually derived from fish skin or scales and is predominantly associated with Type I collagen. Marine products can appeal to consumers who specifically prefer a fish-derived source. Neither source should automatically be regarded as universally “better”. The appropriate choice depends on factors including dietary preferences, product formulation, sourcing and individual requirements. The important point is that two products both marketed as collagen supplements may originate from completely different sources.

Collagen type matters too

Another distinction is the type of collagen contained within the source material. More than 20 types of collagen have been identified, although a smaller number account for most of the collagen present in the human body. Type I collagen is particularly abundant and is found in tissues including skin, bone and tendons. Type III is commonly found alongside Type I and occurs in tissues including skin and blood vessels.

Type II is strongly associated with cartilage and is often discussed separately in relation to joint-focused collagen products. A consumer comparing two collagen supplements should therefore consider both the source and the collagen types associated with that source rather than assuming all collagen products are interchangeable.

What does molecular weight mean?

A less familiar difference between collagen peptide ingredients is their molecular weight. Molecular weight is commonly expressed in Daltons (Da) or kilodaltons (kDa). During hydrolysis, larger collagen proteins are broken into shorter peptide chains. These peptides can vary in size depending on factors such as the enzymes used, processing conditions and the extent of hydrolysis. A collagen ingredient may therefore be described as having an average molecular weight of, for example, several thousand Daltons.

It is important to understand that an average molecular weight does not normally mean every peptide in the ingredient has exactly the same mass. Hydrolysed collagen contains a distribution of peptides of different sizes. For anyone interested in the terminology, a more detailed guide to Daltons in collagen peptides can help explain how these measurements are used when describing hydrolysed collagen ingredients. Molecular weight provides useful technical information, but it should not be treated as a standalone measure of product quality.

Does smaller automatically mean better?

This is where collagen marketing can become overly simplistic. Hydrolysis creates smaller peptide chains, and peptide size is relevant when researchers study how proteins and peptides are digested and absorbed. However, it does not follow that the product displaying the lowest Dalton number must automatically be the “best” collagen. The body continues to digest proteins and peptides after they are consumed. Researchers therefore consider several factors, including:

• peptide size

• amino-acid sequence

• digestion

• absorption

• metabolism

• the resulting amino acids and peptides present after ingestion

Molecular weight is consequently best viewed as one characteristic of a collagen ingredient, rather than a score that can be used to rank every collagen supplement.

Serving size doesn't tell the whole story

Another common way consumers compare collagen products is by looking at the number of grams supplied in each serving. This is useful information because it tells you the quantity of collagen provided. However, it does not tell you:

• where the collagen originated

• what collagen types are associated with the source

• how the collagen was processed

• the peptide molecular-weight profile

• whether other ingredients have been added

• what testing or certification has been carried out

Two products could therefore each provide 10 grams of collagen peptides while differing significantly in other respects. The number of grams is important, but it should be considered alongside the wider ingredient specification.

Check the ingredient list

Collagen products can also differ considerably in formulation. Some powders contain collagen peptides as the only ingredient. Others may contain:

• flavourings

• sweeteners

• vitamins

• minerals

• hyaluronic acid

• botanical ingredients

• colours or other additives

There is nothing inherently wrong with a multi-ingredient formulation, but consumers should understand what they are purchasing. Someone wanting a simple collagen product may prefer a single-ingredient powder, while another person may specifically want a formulated product containing additional nutrients. Reading the full ingredient list is therefore more informative than relying on the front-of-pack marketing alone.

Consider sourcing and traceability

The raw material used to produce collagen is another point of difference. Questions worth considering include:

• Is the collagen source clearly stated?

• Is information available about how the animals were raised?

• Can the manufacturer provide traceability information?

• Where is the ingredient processed?

• Are recognised manufacturing standards followed?

Terms such as “grass-fed” may also appear on bovine collagen products. Consumers interested in these descriptions should look for clear supporting information rather than assuming every sourcing claim means the same thing across different manufacturers. Transparency can be particularly useful when comparing products that otherwise appear almost identical.

Certification can matter

For some consumers, certification is an important consideration. This may include certifications relating to dietary, manufacturing or religious requirements. For example, consumers looking specifically for halal collagen should check whether the product has been independently certified rather than relying simply on the fact that it is bovine-derived. Bovine collagen is not automatically halal solely because it comes from cattle. Factors relating to the source and processing of the ingredient also need to meet the relevant certification requirements. The same principle applies more broadly: where a particular certification is important to you, look for evidence from an appropriate independent organisation.

So, are all collagen supplements essentially the same?

No. Products marketed under the broad term “collagen” can differ according to:

• animal source

• collagen type

• hydrolysis process

• peptide molecular weight

• serving size

• formulation

• sourcing

• manufacturing

• testing

• certification

This does not mean that one characteristic alone determines whether a collagen supplement is good or bad. Instead, consumers should look at the overall specification of the product. A large serving does not automatically make one collagen superior. A low molecular-weight figure does not automatically make another superior. Likewise, premium packaging or marketing terminology cannot replace meaningful information about what is actually inside the product.

The bottom line

Collagen is often discussed as though it were one standardised ingredient, but there can be meaningful differences between collagen products. The source of the collagen, the types associated with that source, the way it has been hydrolysed, its peptide characteristics and the overall formulation all contribute to what ultimately ends up in the packet. Understanding those differences makes it easier to compare products on more than price or serving size alone.

The most useful approach is therefore simple: look beyond the word “collagen” on the front of the pack and examine the ingredient behind it. Not all collagen is made the same and knowing what to look for can make collagen labels considerably easier to understand.

Disclosure

The author is the founder of Beauvyn, a UK wellness brand that sells hydrolysed bovine collagen peptides. This article is intended to provide general educational information about collagen ingredients and product specifications and does not constitute personalised nutritional or medical advice.