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In contrast, the PRP/PC group demonstrated heterogeneous histological findings, where some seminiferous tubules showed nearly complete spermatogenesis, while others contained necrotic cells within constricted lumina, indicating variable and uneven regenerative responses
Although these findings suggest potential benefits of GABA-related interventionsgiven carnosines proposed modulation of GABAergic activity and zinc/copper homeostasisthe mechanism remains unclear, and replication in larger, independent samples is needed (183)
Safety and Side Effects Copper peptide GHK-Cu is generally well-tolerated , with minimal side effects: Mild Reactions: Temporary redness or irritation at application site
Oral supplementation of nicotinamide riboside alters intestinal microbial composition in rats and mice, but not humans
