15/03/2026
Dalton Weight — Why It Matters in Collagen
Marine and bovine collagen differ mainly in source and collagen type.
Marine collagen (from fish) is mostly Type I collagen, the primary collagen found in human skin, supporting elasticity, firmness, and fine lines.
Bovine collagen (from cows) contains Type I and Type III collagen, which support skin, hair, nails, and connective tissue.
However, an important factor beyond the source is Dalton weight (molecular weight).
Dalton weight refers to the size of the collagen peptides. The smaller the peptide, the easier it is for the body to absorb. These smaller fragments are known as hydrolysed collagen or collagen peptides.
Many standard collagen supplements contain molecules of around 10,000 Daltons, which are more difficult for the body to absorb efficiently. High-quality hydrolysed collagen is typically around 2,000 Daltons or lower, allowing it to pass more easily through the intestinal wall and into the bloodstream.
In simple terms: it’s not only about how much collagen you take, but how well your body can absorb it. Molecular size and quality are therefore key factors.
Clinical Evidence
Unlike skincare products, dietary supplements are not always required to prove clinical efficacy. For this reason, it is important to choose products that are:
• Clinically tested on the finished product
• Evaluated by independent laboratories
• Tested under dermatological supervision.
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