It has an acetyl group (COCH3) attached to the sulfur atom of cysteine in the glutathione molecule
It has been studied for effects related to collagen and elastin , and for its relationship to enzymes involved in remodeling tissue
This systems activity declines with aging, and restoring it helps cells maintain internal cleanliness, likely contributing to GHK-Cus observed anti-aging effects at the cellular level
The FDA does not review them for safety, strength, or purity the way it reviews Zepbound and Mounjaro

Theyre often called GLP1 medications and are approved by the FDA for adults with obesity or type 2 diabetes.(Wikipedia) They slow digestion so you feel full longer They reduce hunger , so you eat less Often help you lose 10%20% of your body weight over time They also help lower blood sugar and improve heart health among people with type 2 diabetes Steady weight loss (sometimes up to 20% of your starting weight ) Less hunger and cravings Improved blood pressure and cholesterol Improvement of obstructive sleep apnea Better energy and mood Makes it easier to stay active and healthy Semaglutide have shown promise in slowing down kidney disease and lower the chance of kidney failure (Some are mild and go away as your body adjusts.) Nausea, upset stomach, diarrhea, or constipation Tiredness or feeling weak Bloating, burping, or stomach pain These may happen more often when your dose gets higher and usually ease over time