A small Norwegian trial found that 12 g/day of salmon protein hydrolysate lifted ferritin by about 13% and red blood cells by about 7% compared with whey over eight weeks. Secondary results hinted at lower inflammation, better glucose markers and improved body composition. But the study had only 14 participants and was industry-sponsored, so it is a signal rather than proof. Here is what salmon peptides are, what the trial found, how they differ from collagen, and why caution is essential.
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