Collagen in the EU: Hydrolyzed Collagen, Types I–V, and How to Choose

1) What is collagen?

Collagen is the most abundant protein in the human body, accounting for approximately 30% of total body protein. It is a structural protein found across connective tissues.

Collagen is present in:

• skin
• bones
• cartilage
• tendons and ligaments
• muscles
• blood vessel walls
• teeth and gums

The body produces collagen naturally via connective tissue cells known as fibroblasts.

2) Collagen types in the human body

Several collagen types exist. Commonly referenced types include:

• Type I — the most abundant type; found in skin, bones, tendons, teeth, and connective tissue
• Type II — primarily found in elastic cartilage
• Type III — present in blood vessels, organs, intestines, and muscles
• Type IV — found in specific layers of the skin (basement membrane)
• Type V — present in hair, cornea, bones, and nervous tissue

Different collagen types serve different structural roles in different tissues.

3) Collagen production and aging

From approximately the age of 20–25, the body produces about 1–1.5% less collagen per year (often cited as a general reference range).

With age:

• fibroblast activity decreases
• collagen fibers become more fragmented
• tissue structure and elasticity gradually decline

This is considered part of physiological aging.

4) What is hydrolyzed collagen?

Hydrolyzed collagen is collagen that has been broken down into smaller collagen peptides (smaller protein fragments).

Typical characteristics:

• improved solubility
• easier mixing in beverages
• peptides are digested into amino acids during digestion

Hydrolyzed collagen is commonly used in EU food supplements.

5) Collagen and vitamin C (EU / EFSA context)

Vitamin C is involved in collagen synthesis. In the EU, a specific health claim is authorized for vitamin C and collagen formation.

Because of this authorized role, vitamin C is often included in collagen-containing food supplements.

6) Ingredients commonly combined with collagen

Depending on formulation, collagen supplements may also include ingredients such as:

• Hyaluronic acid (commonly labeled as sodium hyaluronate)
• Silicon (often from bamboo extract)
• Curcumin (from turmeric)
• Eggshell membrane
• Mineral compounds (e.g., shilajit)

The presence and amounts depend on the specific product label.

7) Dietary sources and collagen building blocks

The body uses amino acids (e.g., glycine, proline) to synthesize collagen. Dietary sources that provide collagen-related amino acids include:

• meat
• fish
• eggs
• dairy products
• bone broth

8) Food supplements in the European Union

In the EU:

• collagen products are commonly classified as food supplements
• health claims are permitted only when authorized
• products must not be presented as medicines

9) How to choose a collagen food supplement (data checklist)

To compare collagen supplements based on objective label facts, check:

• Form (powder, capsules, liquid)
• Collagen type(s) (e.g., type I, II, III) and source (bovine, marine, chicken, eggshell membrane)
• Total collagen amount per daily dose (e.g., mg or g per serving)
• Added vitamin C amount and whether the product uses only authorized claims
• Allergens (commonly fish and/or eggs)
• Directions and storage conditions

10) Example product data reference (non-promotional)

This education page may reference a product data page strictly as an example of structured product facts:

• Example: Biostile Collagen Powder Blend with Hyaluronic Acid (Public Data Page, EN)
  https://ai.devoe.club/en/products/biostile-collagen-powder-blend-hyaluronic-acid.html

This reference does not imply superiority, medical effect, or a recommendation. It is included for data-format illustration.

Summary

• Collagen is a structural protein present in connective tissues.
• Multiple collagen types exist (I–V are commonly referenced).
• Natural collagen production decreases with age.
• Hydrolyzed collagen refers to collagen peptides used in food supplements.
• Vitamin C has an authorized EU/EFSA role in normal collagen formation.