The body has at least 28 known types of collagen, but only 3 matter for supplements: Type I, Type II, and Type III. Each targets different tissues and has different best-fit uses at 40 mg to 20 grams daily.
Quick Answer
Type I is the most abundant in skin, hair, nails, and bones (90% of body collagen). Type II is in cartilage and joints. Type III pairs with Type I in skin and blood vessels. Most general supplements deliver Type I and III. For joints specifically, Type II at 40 mg daily has the strongest evidence.
Key Takeaways
- The body has 28 known collagen types; only 3 matter for supplements
- Type I makes up about 90% of all collagen in the body
- Type II targets cartilage; UC-II at 40 mg daily for arthritis
- Type 3 pairs with Type 1 in skin, gut, and blood vessels
- Bovine source provides Types 1 and 3; chicken provides Type 2
- Marine collagen is mostly Type 1 with smaller peptides for absorption
The 3 Types You Need to Know
Out of 28 collagen types in the human body, only 3 are commonly studied and supplemented. Each has a different role in the body and a different best-fit supplement source.[1]Ricard-Blum S. The collagen family — Cold Spring Harb Perspect Biol 2011 View source
For a deeper look at how collagen works overall, the complete collagen peptides guide covers the basics that apply across all 3 types.
| Type | Body Tissues | Best Source |
|---|---|---|
| Type I | Skin, hair, nails, bones, tendons | Bovine, marine |
| Type II | Cartilage, joints | Chicken (UC-II) |
| Type III | Skin, gut, blood vessels, organs | Bovine |
Type I Collagen: The Workhorse
Type I makes up about 90% of all the collagen in your body. It is the main structural protein in skin, bones, tendons, ligaments, and the dentin in your teeth. Most beauty and anti-aging supplements deliver Type I.
- Best for: skin elasticity, hair, nails, bones, tendons
- Sources: bovine (cow) hide and bones; marine (fish) skin and scales
- Standard dose: 10 to 20 grams of hydrolyzed peptides daily
- Time to effect: 8 to 12 weeks for skin; 16 to 24 weeks for nails
- Marine vs bovine: marine peptides are slightly smaller but daily consistency matters more
Type II Collagen: For Joints
Type II is the cartilage type. It makes up about 50% of the dry weight of cartilage and is the type that wears down in osteoarthritis. Type II collagen supplements come from chicken sternum and use a different mechanism than other types.[2]Collagen Structure and Stability — Annu Rev Biochem View source
Two forms exist:
- Hydrolyzed Type II: dosed at 1,000 to 5,000 mg daily; supplies amino acids for cartilage
- Undenatured Type II (UC-II): dosed at 40 mg daily; works through immune modulation in the gut
- UC-II evidence: a 2016 trial in 191 adults with osteoarthritis showed measurable pain reduction at 6 months
- How UC-II works: small undamaged collagen fragments train the immune system to stop attacking cartilage
For a daily option that combines Type II with hyaluronic acid, Remedy's Nutrition Hyaluronic Acid + Type II Collagen delivers both for joint and skin support.
Type III Collagen: Working With Type I
Type III is the second most abundant collagen, found in skin, blood vessels, gut, and internal organs. It almost always works alongside Type I, especially in young or rapidly regenerating tissue. Most quality bovine collagen supplements deliver Types I and III together in roughly the same ratio your body produces them.
- Best for: skin elasticity, blood vessel integrity, gut lining support
- Source: bovine (cow) hide and bones
- Dose: included in standard 10 to 20 gram bovine peptide doses
- Cannot be isolated easily: Type III always travels with Type I in supplements
- Notable use: some leaky gut protocols rely on Type III for gut lining repair
How to Choose Based on Your Goal
| Your Goal | Pick This Type | Daily Dose |
|---|---|---|
| Skin and beauty | Type I + III (bovine or marine) | 10 grams peptides |
| Hair and nails | Type I + III (bovine) | 10 to 20 grams peptides |
| Joint pain (osteoarthritis) | Type II UC-II | 40 mg |
| Active joint support | Type I + II combined | 10 g peptides + 40 mg UC-II |
| Gut lining support | Type I + III (bovine) | 10 to 20 grams peptides |
| Bone density (postmenopausal) | Specific Type I peptides | 5 grams |
Frequently Asked Questions
What is the difference between Type I and Type II collagen? +
Type I makes up about 90% of body collagen and is found in skin, hair, nails, bones, and tendons. Type II is specific to cartilage and joints, making up about 50% of cartilage by weight. Type I is what most beauty supplements deliver; Type II is what joint-specific products focus on. They serve 2 different goals.
Is marine collagen better than bovine? +
Both are mostly Type I and both work well for skin, hair, and nails. Marine collagen has slightly smaller peptide chains and absorbs about 1.5 times faster on average. The practical difference is small. Daily consistency at 10 grams matters more than the source. Pick what you tolerate and prefer the taste of. Marine is fishier; bovine is nearly tasteless when unflavored.
What type of collagen is best for skin? +
Type I is the main collagen in skin, with Type III also abundant. Most bovine and marine supplements deliver both Type I and III together. Look for hydrolyzed peptides on the label and 10 grams daily for at least 8 weeks. Pair with 75 to 90 mg of vitamin C daily for best results, since vitamin C is required for collagen synthesis.
What type of collagen is best for joints? +
Type II is the cartilage type and the most targeted for joints. Undenatured Type II (UC-II) at 40 mg daily has the strongest osteoarthritis evidence; a 2016 trial in 191 adults showed measurable pain reduction after 6 months. Hydrolyzed Type II at 1,000 to 5,000 mg daily also works. Active adults often combine Type I peptides with Type II for broader support.
Can I take Type I and Type II together? +
Yes. They work on different goals and through different mechanisms. Type I provides amino acids for skin, hair, nails, and connective tissue. Type II UC-II works through immune modulation for cartilage. Common stack: 10 grams of bovine hydrolyzed peptides plus 40 mg of UC-II daily. There is no negative interaction; just take both consistently for at least 12 weeks.
What is undenatured collagen (UC-II)? +
UC-II is undenatured Type II collagen, dosed at just 40 mg daily. Unlike hydrolyzed collagen which provides amino acids, UC-II works through oral tolerance: small undamaged collagen fragments train the immune system to stop attacking joint cartilage. This is why such a small dose works. Evidence comes from osteoarthritis trials in adults aged 50 plus.
Is chicken collagen better than bovine? +
For joints specifically, chicken collagen (which contains Type II) has the targeted evidence. For skin, hair, and nails, bovine (Type I and III) is the better fit. They serve 2 different goals. Many people use both: bovine peptides at 10 grams for daily skin and hair support plus 40 mg of chicken-derived UC-II for joints.
Can vegans take collagen? +
Not real collagen, since all true collagen comes from animals. Vegan "collagen-builder" products combine vitamin C, copper, zinc, lysine, and other amino acids that signal the body to make its own collagen. Effects are smaller and less direct than animal collagen, but a clean diet plus the right cofactors can support natural collagen production over 12 to 24 weeks.
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Pure unflavored hydrolyzed Type I and III peptides for skin, hair, nails, and bone support. No fillers, made in USA.
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50 mg hyaluronic acid with Type II collagen for joint and skin support. Pairs naturally with Type I peptides.
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