on July 07, 2025
Collagen is an important structural protein in the body. It makes up a large part of connective tissue such as skin, bones, tendons and cartilage. Collagen supplements are popular, but not all collagen is the same. Two common forms are marine collagen (from fish) and bovine collagen (from cows). In this blog, we explain the differences so you can make an informed choice.
What Is Collagen?
Collagen is a protein found in the connective tissues of humans and animals. It’s made up of amino acids such as glycine, proline, and hydroxyproline. The body produces collagen, but that production gradually decreases with age. That’s why some people choose to take supplements.
What Is Marine Collagen?
Marine collagen is derived from fish, usually from the skin, scales, or bones. It is commonly used in powder or capsule form. Marine collagen consists almost entirely of type I collagen and is often hydrolyzed (broken down into small peptides) to make it more water-soluble.
What Is Bovine Collagen?
Bovine collagen comes from cows, typically from hides and bones. Supplements usually contain type I and III collagen. It’s widely available in powder form and also used in capsules and drinks. Like marine collagen, bovine collagen is often hydrolyzed.
Structure and Molecular Size
- Marine collagen: consists of smaller peptides, which improves solubility.
- Bovine collagen: has slightly larger molecules, but when properly hydrolyzed, it is also highly soluble.
Note: Differences in size do not mean that one is absorbed better than the other. No health claims may be made in this regard.
What Types of Collagen Do They Contain?
- Marine collagen: contains mostly type I collagen.
- Bovine collagen: typically contains both type I and type III collagen.
Type I is the most abundant collagen in the body and is found in skin, bones, and tendons. Type III is found in organs and skin and often occurs alongside type I.
Labeling and Source Information
Check the label of any collagen product for useful information such as:
- Source: fish, cow, or chicken
- Collagen type: I, III, or a combination
- Form: hydrolyzed peptides or native collagen
- Production method: enzymatic hydrolysis
- Allergen information (e.g. contains fish)
Marine collagen labels often state whether the fish are wild-caught or farmed. Bovine collagen typically comes from European or South American cattle.
Comparison: Sustainability
- Marine collagen: sometimes extracted from by-products of the fish industry (like skins or scales), which helps reduce waste.
- Bovine collagen: also comes from by-products such as hides and bones. Sustainability depends on the origin and farming practices.
For a conscious choice, look for brands that are transparent about sourcing and processing.
Ease of Use and Formats
Both types of collagen are available as:
- Powders (for mixing into drinks, smoothies, or yogurt)
- Capsules (easy for on-the-go)
- Ready-to-drink shots or sticks
Note: The format does not determine effectiveness. Choose the option that best fits your daily routine.
Frequently Asked Questions
1. Is marine collagen suitable for people with a fish allergy?
No. Marine collagen contains fish-derived ingredients. In that case, choose bovine collagen or a product without fish allergens.
2. Is bovine collagen halal or kosher?
That depends on the source and how it’s processed. Look for halal or kosher certification on the label if it matters to you.
3. Is there a taste difference between marine and bovine collagen?
Marine collagen may have a mild fishy flavor, especially if it’s not highly purified. Bovine collagen is generally considered neutral in taste.
4. Are both suitable for daily use?
Yes, if used according to the dosage recommended on the label. Supplements are not a substitute for a healthy lifestyle.
5. Is one type of collagen better than the other?
That depends on personal preference, diet, and allergies. There is no scientific proof that one is objectively better than the other. Choose what fits your needs best.
Why This Information Helps You Decide
With so many collagen products available, it helps to understand the differences between marine and bovine collagen. This allows you to make informed decisions based on source, allergens, and ease of use. It also builds trust in the product and brand.
Our collagen products contain Naticol® fish collagen
The scientific evidence consistently shows that daily intake of Naticol® fish collagen peptides positively affects skin hydration, elasticity, and wrinkle formation at dosages starting from 2.5 g. Higher dosages (5 g and 10 g) provide additional benefits in firmness and hydration.
Thanks to its high bioavailability and excellent tolerability, Naticol® is a safe and effective choice for consumers looking to support their skin, hair, and nails.
Our product lines Pure Marine Collagen and Beauty Blend Collagen combine Naticol® with carefully selected vitamins and minerals.
Summary
- Marine collagen comes from fish and contains type I collagen.
- Bovine collagen comes from cows and contains type I and III collagen.
- Both are typically hydrolyzed for better solubility.
- Pay attention to
