I can say this from the venerable age of 52.
Only 6 years away :D
Here, there is a lot of salmon eaten, and we eat a fair bit. However, I am interested in the collagen, as this is the third time it has come up in less than a week, so perhaps it is a sign. What effects has it had on you?
Better sleep, better recovery, potentially some mild nootropic effects, and less joint pain - when I'm consistent with it.
https://www.verywellhealth.com/glycine-overview-4583816
The benefits from collagen are likely from the amino acid glycine. If your diet is already adequte in glycine it may not make a remarkable difference.
https://www.ergo-log.com/collagen-supplement-worn-joints-stiff-painful.html
"Glycine Exhibits Neuroprotective Effects in Ischemic Stroke in Rats through the Inhibition of M1 Microglial Polarization via the NF-κB p65/Hif-1α Signaling Pathway
https://journals.aai.org/jimmunol/article/202/6/1704/109885/Glycine-Exhibits-Neuroprotective-Effects-in
From the NIH
https://pmc.ncbi.nlm.nih.gov/articles/PMC10379184/