The peptides increased levels of a growth factor (TGF-β1) in the skin wounds after two weeks, which helps in tissue repair and collagen production.

Within the first two weeks, the peptides boosted levels of bFGF, a growth factor that helps skin cells multiply and repair the wound.

After two weeks, the skin wounds of rats given the peptides had more collagen, which is the main structural protein needed for strong healing.

Rats given a specific dose of salmon collagen peptides after C-section surgery healed faster with stronger skin wounds compared to rats not given the peptides.

The peptides helped form more blood vessels in the skin wounds of rats within a week, which is important for delivering nutrients to heal the wound.

At one week, the peptides increased CD31, a marker for blood vessels, helping to form new vessels in the wound area.