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Why Does Collagen Size Matter?

Collagen is the most abundant protein in the human body, crucial for maintaining skin elasticity, joint health, and overall structural integrity. Among the 28 types of collagen identified, three stand out: 

3 Types of Collagen: 

Type I Collagen: The most prevalent, found in skin, tendons, and bones. It’s the go-to for those seeking collagen for skin benefits.

Type II Collagen: Mainly found in cartilage, this type is vital for joint health and is often used in supplements for arthritis.

Type III Collagen: Commonly found alongside Type I in skin and blood vessels, it supports skin firmness and elasticity.

Molecular Size of Collagen

The molecular size of collagen, measured in Daltons (Da), is a critical factor in determining its effectiveness. Smaller molecules, such as those found in marine collagen, particularly Korean marine collagen, are more easily absorbed by the body. These molecules typically range from 300 to 1,000 Daltons, whereas larger collagen molecules can exceed 100,000 Daltons, making absorption more challenging.

How is Collagen Absorbed?

Collagen absorption begins in the digestive system. Here’s a simplified journey:

  1. Ingestion: You consume collagen through food or supplements.
  2. Digestion: Enzymes break down the collagen into smaller peptides.
  3. Absorption: These peptides pass through the intestinal wall into the bloodstream.
  4. Utilization: The body transports these peptides to the skin, joints, and other tissues where they are needed.

Smaller collagen molecules, such as those from marine collagen, are broken down more efficiently, enhancing their absorption and bioavailability.

Bioavailability of Collagen 

Bioavailability refers to the proportion of collagen that enters the circulation and is available for use by the body. Smaller molecular sizes increase bioavailability, meaning more collagen reaches your skin, joints, and other tissues. Marine collagen, especially Korean marine collagen, is celebrated for its high bioavailability due to its small molecular size and 100% purity, making it one of the most effective options for improving skin health and elasticity. 


In the world of collagen supplements, size truly matters. The smaller the collagen molecule, the better it is absorbed and utilized by the body. Marine collagen, with its small molecular size, offers superior bioavailability and effectiveness, particularly for skin benefits. When choosing a collagen supplement, look for high-quality, pure sources with optimal molecular sizes to ensure you reap the maximum benefits. Here’s to unlocking the full potential of collagen for radiant, youthful skin! 

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