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Some of the most common classes include: Hormonal peptides like Tesamorelin or GH-releasing peptides , which regulate growth hormone output Repair peptides like BPC-157 and TB-500 , which aid in tissue regeneration and wound healing Metabolic peptides such as CJC-1295 or GLP-1 analogs , which influence fat loss and insulin response Muscle-building peptides including IGF-1 LR3 and PEG-MGF , which promote hypertrophy and muscle recovery Peptides function as highly specific signaling molecules in the endocrine, nervous, and immune systems and their therapeutic potential continues to grow. Craik et al., Chemical Biology & Drug Design Are Peptides Natural or Synthetic

Peptides are naturally occurring chains of amino acids that serve as signaling molecules across a wide range of biological systems

This is often accompanied by a decline in the efficiency of antioxidant defense systems, such as the reduced activity of superoxide dismutase (SOD), catalase, and glutathione peroxidase (GPx)

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