Types of Collagen: A Simple Guide to 5 Main Types and Which Suits Skin or Joints
Types of Collagen: Why Do Supplements Differ?
When you shop for a collagen supplement, labels say things like “Types 1 & 3” or “Type II”. What do these numbers mean, and do they work differently? This guide explains the main types of collagen in the body, where each is found and how to choose the right supplement for your goal.
What Is Collagen?
Collagen is the most abundant protein in the body. It forms the framework that gives skin its elasticity, bones their strength and tendons their toughness. It is made of three protein chains twisted together and is rich in the amino acids glycine, proline and hydroxyproline. Scientists have identified 28 types, but five make up the vast majority.
The Five Main Types of Collagen
| Type | Where it is found | Role |
|---|---|---|
| Type I | Skin, bone, tendons, teeth | Strength and structure; about 90% of the body’s collagen |
| Type II | Cartilage | Joint cushioning and flexibility |
| Type III | Skin, blood vessels, muscles | Elasticity; usually found with Type I |
| Type IV | Basement membranes beneath skin layers | Filtration and support |
| Type V | Hair, cornea, placenta | Regulates collagen fibre formation |
Types I and III: For Skin, Hair and Nails
These two are the most common types of collagen in skin supplements. They usually come from bovine or porcine hide or from fish skin and scales, and are supplied as hydrolyzed peptides that are easy to absorb. One example is Youtheory Collagen 6,000 mg, which provides Types 1 and 3 peptides with vitamin C.
Type II: For Joints
Type II is found in cartilage and is usually extracted from chicken sternum cartilage. It comes in two forms: hydrolyzed, or undenatured (UC-II), which is used in very small doses. It is the type most often paired with glucosamine in joint formulas.
Hydrolyzed Collagen vs Gelatin
Gelatin is partially cooked collagen, while hydrolyzed collagen is broken down into smaller peptides that dissolve in cold water and are easier to absorb. That is why most skin supplements use the hydrolyzed form.
How to Choose the Right Type
- For skin, hair and nails: hydrolyzed Types I and III.
- For joints: Type II, sometimes with glucosamine.
- For bones and tendons: mainly Type I.
Also check the collagen source, which varies between bovine, porcine and marine – we explain this in our article on collagen sources.
Why Does Collagen Decline with Age?
Collagen production starts to fall gradually after the mid-twenties and drops faster in women after menopause. Sun exposure, smoking, excess sugar and poor sleep all speed up the breakdown of existing collagen. This affects all types of collagen in the body, showing up as lines and sagging in the skin and stiffness in the joints.
What Does Research Say?
Scientific reviews suggest that collagen peptides may improve skin elasticity and hydration after 8–12 weeks, while evidence for hair is weaker. Swallowed collagen does not travel straight to one spot; it is broken down into amino acids and peptides that the body uses where needed. So the different types of collagen in a supplement mainly reflect its source and intended use.
Types of Collagen FAQ
Do I need every type?
No. Choose by goal: Types I and III for skin, Type II for joints.
Can I combine types?
Yes. Some products combine several types; just follow the dose on the label.
What dose should I take?
Read our guide to collagen dosage.
Is vitamin C necessary?
Vitamin C contributes to normal collagen formation, which is why many supplements add it.
Conclusion
Knowing the difference between Types I, II and III helps you choose the right supplement for your goal. If your aim is skin, hair and nails, you can find Youtheory Collagen 6,000 mg at No Style Like pharmacy with delivery across Egypt.
This article was reviewed by the No Style Like pharmacy content team. It is for general awareness only. Collagen supplements are dietary supplements, not medicines intended to diagnose or treat any disease, and this article does not replace advice from your doctor or pharmacist.
Do not expect instant results; collagen supplements need weeks of consistent use. Check the collagen source on the label if you have a fish allergy or avoid certain animal products, and ask your doctor during pregnancy and breastfeeding. For more information see The Nutrition Source collagen page from Harvard.