Not always
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
It gives you the tools to ask informed questions and interpret your experience
Some ingredient lists look similar to multivitamins, and others focus more on botanicals and amino acids
Xia Y, Sancho-Martinez I, Nivet E, Rodriguez Esteban C, Campistol JM, Izpisua Belmonte JC (2014) The generation of kidney organoids by differentiation of human pluripotent cells to ureteric bud progenitor-like cells