Marine vs Bovine Collagen: What's the Difference?

Walk into almost any health food shop or browse online, and you'll quickly discover there are countless collagen products available. One of the biggest decisions people face is whether to choose marine collagen or bovine collagen.

Both provide collagen, both have become increasingly popular, and both are widely used in supplements. However, they come from different sources and contain slightly different collagen types, leading many people to wonder which is the better choice.

The truth is that neither marine collagen nor bovine collagen is universally "better". The right option depends on your dietary preferences, lifestyle and personal health goals.

In this guide, we'll explain the differences between marine and bovine collagen, explore their potential benefits, and discuss how natural food sources such as bone broth fit into the picture.

What Is Collagen?

Collagen is the most abundant protein in the human body. It acts as the body's natural framework, helping provide structure and strength to:

• Skin

• Bones

• Cartilage

• Tendons

• Ligaments

• Muscles

• Blood vessels

• Connective tissues

Our bodies naturally produce collagen throughout life. However, from our mid-20s onwards, production gradually begins to decline. This is a normal part of ageing and contributes to many of the visible and physical changes we experience over time.

Collagen is made up of amino acids, particularly glycine, proline and hydroxyproline, which the body uses to build and repair connective tissues.

What Is Marine Collagen?

Marine collagen is collagen sourced from fish, most commonly from the skin, scales and bones of marine fish.

It is primarily made up of Type I collagen, which is the most abundant collagen found in the human body.

Because Type I collagen is found in skin, bones and tendons, marine collagen is often marketed in beauty products aimed at supporting healthy skin.

Marine collagen supplements are commonly available as collagen peptides, making them easy to mix into drinks and smoothies.

What Is Bovine Collagen?

Bovine collagen comes from cattle, typically from hides, bones and connective tissues.

Unlike marine collagen, bovine collagen naturally contains both Type I and Type III collagen.

Type III collagen is found alongside Type I in many soft tissues, including skin, muscles and blood vessels.

Traditional beef bone broth is also naturally rich in collagen because it is made by slowly simmering bones and connective tissues over many hours, allowing collagen and naturally occurring proteins to be released into the broth.

Marine vs Bovine Collagen at a Glance

Which Contains More Types of Collagen?

Marine collagen is predominantly Type I collagen.

Bovine collagen naturally contains both Type I and Type III collagen.

Although there are over 28 recognised types of collagen, Types I, II and III account for the vast majority found within the body.

Neither source contains every collagen type naturally, which is why some supplements combine multiple collagen sources.

Which Is Better for Skin?

Skin is made largely from Type I collagen, which explains why marine collagen is frequently promoted in skincare supplements.

Research suggests that collagen supplementation may help improve skin hydration and elasticity in some people, although results vary between individuals and should not be viewed as a miracle solution.

Bovine collagen also contains Type I collagen, meaning both marine and bovine collagen can contribute amino acids used by the body during normal collagen turnover.

Which Is Better for Joints?

Healthy joints rely on collagen-rich cartilage to help cushion movement.

Both marine and bovine collagen provide amino acids that contribute to the body's collagen production.

It's worth noting that Type II collagen, which is the main collagen found in cartilage, is usually sourced from chicken rather than fish or cattle.

If joint health is your primary focus, it's useful to understand which collagen type a product contains rather than simply whether it is marine or bovine.

Which Is Better for Bones?

Bones contain both minerals and collagen.

The collagen framework helps give bones flexibility while minerals such as calcium provide strength.

Eating enough protein alongside a balanced diet rich in calcium and vitamin D remains one of the best ways to support normal bone health.

Which Is Better for Gut Health?

You'll often see collagen promoted for gut health across social media.

While collagen provides amino acids used throughout the body, research into its direct effects on gut health is still developing.

Supporting your gut involves many factors, including:

• Eating a varied diet.

• Including fibre-rich foods where appropriate.

• Eating fermented foods.

• Consuming adequate protein.

• Maintaining an overall healthy lifestyle.

Bone broth has long been enjoyed as a traditional nourishing food, although it should not be viewed as a treatment for digestive conditions.

Marine vs Bovine: Which Is Better for Bone Broth?

This is where bovine collagen differs significantly.

Traditional beef bone broth naturally contains collagen released during the slow cooking of bones and connective tissues.

Rather than extracting collagen into an isolated ingredient, bone broth provides collagen as part of a whole-food approach.

At British Broth Company, our bone broth is slowly cooked using British bones before being carefully dehydrated to create a convenient broth that can be enjoyed every day.

Sustainability Considerations

Many people also consider sustainability when choosing collagen.

Marine collagen often makes use of fish by-products such as skin and scales that might otherwise be discarded.

Similarly, bovine collagen frequently utilises hides, bones and connective tissues from the beef industry, making use of parts of the animal that might otherwise go to waste.

Choosing responsibly sourced ingredients can help support more sustainable food production regardless of which collagen source you choose.

Can You Get Collagen Naturally from Food?

Absolutely.

Many traditional foods naturally contain collagen, including:

• Bone broth

• Slow-cooked beef

• Chicken skin

• Fish skin

• Gelatin

• Meat cooked on the bone

For many people, incorporating these foods into a balanced diet is an enjoyable way to increase collagen intake without relying solely on supplements.

How to Naturally Support Your Body's Collagen Production

Your body doesn't simply absorb collagen and send it directly to your skin or joints. Instead, collagen is broken down into amino acids, which are then used wherever the body needs them.

Supporting natural collagen production involves a healthy lifestyle, including:

• Eating enough protein.

• Including vitamin C-rich fruits and vegetables.

• Staying physically active.

• Getting enough sleep.

• Avoiding smoking.

• Protecting your skin from excessive sun exposure.

• Eating a balanced and varied diet.

Frequently Asked Questions

Is marine collagen better than bovine collagen?

Neither is universally better. Marine collagen mainly contains Type I collagen, while bovine collagen naturally contains both Type I and Type III collagen. The right choice depends on your dietary preferences and health goals.

Does bovine collagen contain Type III collagen?

Yes. Bovine collagen naturally contains both Type I and Type III collagen.

Is marine collagen suitable for pescatarians?

Yes. Marine collagen is sourced from fish, making it suitable for many pescatarian diets.

Does bone broth contain collagen?

Yes. Traditional bone broth naturally contains collagen released from bones and connective tissues during slow cooking.

Can I get collagen without taking supplements?

Yes. Foods such as bone broth, slow-cooked meats, chicken skin and fish skin naturally contain collagen.

Which collagen is best for everyday use?

There isn't one correct answer. Some people prefer collagen supplements for convenience, while others choose collagen-rich whole foods such as bone broth as part of a balanced diet.

Final Thoughts

Marine collagen and bovine collagen both provide collagen, but they differ in their source and collagen composition.

Marine collagen is sourced from fish and primarily contains Type I collagen, while bovine collagen comes from cattle and naturally contains both Type I and Type III collagen.

Rather than asking which is universally "better", it's more helpful to consider your own dietary preferences, lifestyle and nutritional goals.

Whichever option you choose, remember that supporting your body's natural collagen production also depends on eating a balanced diet, consuming enough protein, getting sufficient sleep, staying active and looking after your overall health.

Whether you enjoy collagen supplements or prefer traditional collagen-rich foods such as bone broth, consistency and a healthy lifestyle are likely to have the greatest long-term impact.