Collagen is the most abundant protein in your body, and it’s the secret behind smooth skin, firm joints, and healthy hair. But not all collagen supplements are created equal. Marine collagen vs bovine collagen—which one actually delivers better results for anti-aging?

If you’ve ever stood in the supplement aisle or scrolled through a beauty blog, you’ve likely seen both types of collagen promoted for their skin-boosting powers. But depending on your goals, one may give you that glow-up you’re after more effectively than the other.

Let’s break it down and uncover the truths that go beyond the labels.

What Is Collagen and Why Does It Matter for Aging?

As we age, our body produces less collagen, leading to visible signs like:

• Fine lines and wrinkles

• Sagging skin

• Loss of elasticity

• Thinner hair and brittle nails

By our mid-20s, collagen production begins to decline—and by the time we hit our 40s and 50s, it’s significantly reduced. That’s why collagen supplements have become a go-to for many trying to support graceful aging.

Marine Collagen vs Bovine Collagen: What’s the Difference?

Before we dive into which is better, let’s understand what each is made of.

Marine Collagen

• Sourced from fish skin and scales

• Rich in Type I collagen, which makes up 80% of our skin’s collagen

• Smaller peptides for faster absorption

• Often more expensive and considered more bioavailable

Bovine Collagen

• Derived from cow hide and bones

• Contains both Type I and Type III collagen

• Supports skin, muscles, and gut health

• More widely available and typically more affordable

7 Crucial Comparisons: Marine Collagen vs Bovine Collagen

Let’s get to the heart of the matter—how they stack up when it comes to anti-aging.

1. Bioavailability and Absorption

Marine collagen wins.
Its peptides are smaller and more easily absorbed in the bloodstream, meaning your body can use it faster and more efficiently. This is key when aiming for skin regeneration and hydration.

2. Type of Collagen Provided

• Marine collagen = Type I (best for skin, bones, tendons)

• Bovine collagen = Type I + Type III (skin, muscles, blood vessels)

If you’re focused solely on skin health and anti-aging, marine collagen may be the superior option due to its high concentration of Type I.

3. Effectiveness for Skin Improvement

Clinical studies suggest marine collagen significantly improves skin hydration, elasticity, and smoothness within 4-8 weeks. Type I collagen is the most abundant in the skin, which explains its targeted results.

4. Price Point and Accessibility

Bovine collagen wins here.
It’s more affordable and widely accessible, making it a better option for those on a budget or new to collagen supplements.

5. Environmental and Ethical Considerations

Marine collagen has a slight edge.
It uses parts of fish that are often discarded, making it a more sustainable choice. However, be cautious about the source—opt for wild-caught over farm-raised whenever possible.

6. Taste and Smell

Bovine collagen is typically neutral, while marine collagen can sometimes have a fishy aftertaste unless properly processed. This might affect how you mix it into your drinks or smoothies.

7. Allergy Risk

If you have a fish allergy, steer clear of marine collagen.
On the flip side, bovine collagen may not be suitable for vegetarians or those avoiding beef-based products.

Who Should Choose Marine Collagen?

Marine collagen is ideal if you:

• Want faster skin improvements

• Prefer a pescatarian-friendly option

• Don’t mind spending a bit more for quality

• Are focused on reducing wrinkles and improving skin elasticity

Who Should Choose Bovine Collagen?

Bovine collagen is a great pick if you:

• Want both skin and joint/gut benefits

• Prefer a more cost-effective option

• Need a flavorless addition to your smoothies or coffee

• Don’t have dietary restrictions involving beef

What Do the Experts Say?

According to dermatologists and nutritionists:

“Marine collagen is highly bioavailable and especially effective for improving skin texture and reducing wrinkles.”
— Dr. Rachel Nazarian, MD, FAAD

“Bovine collagen is excellent for overall wellness, including gut and muscle health, in addition to skin.”
— Dr. Josh Axe, DNM, DC, CNS

How to Choose a High-Quality Collagen Supplement

When shopping for collagen, look for:

• Hydrolyzed or peptide form for better absorption

• Third-party testing to ensure purity

• No added sugar or fillers

• Source transparency (wild-caught or grass-fed)

Combining Both Types for Best Results

Can’t decide between the two? You don’t have to.

Many users find benefits in collagen blends that combine marine and bovine sources. This offers a wider spectrum of Type I and III collagen to support skin, gut, and joint health all in one.

The Bottom Line

If your primary goal is anti-aging and skin rejuvenation, marine collagen is likely the better choice due to its superior absorption and targeted skin benefits. But for overall wellness, affordability, and versatility, bovine collagen is a strong contender.

Ultimately, the best choice depends on your body’s needs, lifestyle, and budget.

FAQs About Marine Collagen vs Bovine Collagen

Can I take both marine and bovine collagen together?

Yes, combining them can provide a broader range of benefits, especially for skin, joints, and gut health.

How long until I see results from taking collagen?

Most people notice visible improvements in 4 to 8 weeks with consistent daily use.

Is collagen safe to take long-term?

Yes, collagen is generally safe and well-tolerated when taken as directed.

Do collagen supplements really work?

Yes—numerous studies show they support skin elasticity, hydration, and reduce signs of aging when taken regularly.

Want youthful, radiant skin that lasts? Your answer may lie in the type of collagen you choose—now you have the knowledge to decide.