If you’ve ever wondered what collagen actually is, whether it really works, and why there are so many types, you’re not alone. I’ve been there too — scrolling through product pages, confused by labels like “Type I,” “Type II,” “marine vs bovine,” and wondering what it all means.
Here’s the truth in straightforward terms, based on research and my own experience (I’ve personally been taking Vital Proteins Collagen for several months now and felt a real difference in my skin and general wellbeing).
What Is Collagen, Really?
Collagen is the most abundant protein in your body. It’s part of the structure inside your skin, bones, joints, tendons and connective tissues. Think of it like scaffolding — the support system that keeps tissues strong and resilient.
Our natural collagen production declines as we age, which is why some people turn to supplements for support.
Collagen Types: What’s the Difference?
There are many collagen types in the body — but the most talked about in supplements are Type I, Type II and Type III.
Type I
This is the most abundant collagen in the body. It’s found in skin, tendons, bones and organs. Most beauty-orientedcollagen supplements focus on Type I because it’s linked to smoother, more hydrated skin.
Type II
Type II is the main type found in cartilage — the tissue that cushions joints. This is the form most associated with joint comfort and mobility. It’s the one people often specifically seek out if they want support for joints.
Type III
Type III typically shows up alongside Type I, especially in multisource collagen blends. It contributes to connective tissue structure throughout the body.
I struggle to find at Type II and wondered why is Type II harder to find as a standalone supplement?
Mostly because the supplement market has been skin-first for years. Most products that line shelves are designed for skin, hair and nails — so they focus on Type I (and often Type III). Standalone Type II supplements are more niche and tend to come from cartilage-specific sources, meaning fewer mainstream options.
Bovine vs Marine (and What About Type II?)
When choosing collagen, the source matters.
Marine collagen comes from fish skins and scales and is rich in Type I collagen — excellent for skin, hair and bone support. Marine collagen peptides tend to be smaller and may be easier for the body to absorb.
Bovine collagen is sourced from cows and usually contains Types I and III, making it a popular choice for overall skin and connective tissue support.
Now — I always wondered can collagen Type II be marine?
Technically, yes, but practically almost all Type II supplements come from chicken cartilage, not fish. This is because Type II collagen is concentrated in cartilage, and chicken sternum cartilage is the most common commercially viable source. Marine sources of Type II are rare and not widely used in supplements.
So while marine collagen is great for skin, if you want joint-focused Type II, you’re more likely to see it in poultry-derived formulas.
My Personal Collagen Experience
For the last several months, I’ve been taking Vital Proteins Collagen the Marine Collagen — a product that contains mainly Type I collagen. I chose it because I wanted skin-focused support and because it blends easily into drinks.
I’ve noticed my skin feels more hydrated, my nails seem stronger, and I enjoy the simplicity of adding it to tea or smoothies. It’s not a miracle cure (nothing replaces good nutrition and sleep) — but as part of a balanced routine, it’s been a really positive addition.
If you’re curious, here’s a link to the exact one I use:
Vital Proteins Collagen Peptides
Collagen Suggestions
For skin hydration & elasticity (Type I / I + III):
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Vital Proteins Collagen Peptides — great all-rounder for skin, hair and nails.
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Marine collagen peptides — ideal if you prefer fish-sourced collagen.
For joint comfort (Type II):
Standalone Type II formulas are harder to find, but I found these two options:
Should You Take Collagen?
Collagen supplements aren’t essential for everyone — but if you notice signs of ageing skin, want extra support for joint comfort, or want to include it as part of a holistic wellness routine, they can be beneficial.
A few tips:
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Pair collagen with a balanced diet and vitamin C (which supports your body’s own collagen production).
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Choose the type that aligns with your goals (beauty vs joint).
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Be consistent — benefits often appear over weeks, not overnight.
Hope you found this helpful!
Laura Colucci is the founder of Spritz Wellness and a trained yoga teacher. Inspired by yoga, natural living, and daily rituals of wellbeing, she creates products designed to calm the mind, energise the soul, and support rest in a busy world.
