In these studies, people took different forms of collagen supplements and were compared to those who received a placebo or no collagen intervention
In the test group, there were 12 male and 33 female individuals that received 2.5 g of collagen peptides per day, while the placebo group contained 12 male and 30 female individuals
OLE did not show a synergistic effect with insulin regarding glucose uptake, and stimulated phosphorylation, and hence activation, of AMPK but not phosphorylation of the Akt kinase, which is downstream of the insulin signal [331]
Ornithine (an arginine byproduct) suppressed the metabolism of CD8 + T cells, reducing the intracellular levels of adenosine triphosphate (ATP), and, at the same time, increasing the resistance of tumor cells to CD8 + T cells-mediated cytotoxicity [87]
3ln), whereas cystine levels were not (Fig