The key difference is that retatrutide provides triple agonism (GLP-1 + GIP + glucagon) while semaglutide provides only GLP-1 agonism
Regul Toxicol Pharmacol 32(1):5667 Park BK, Boobis A, Clarke S, Goldring CE, Jones D, Kenna JG, Lambert C, Laverty HG, Naisbitt DJ, Nelson S, Nicoll-Griffith DA, Obach RS, Routledge P, Smith DA, Tweedie DJ, Vermeulen N, Williams DP, Wilson ID, Baillie TA (2011) Managing the challenge of chemically reactive metabolites in drug development

Good sources: Eggs (rich in cysteine) Legumes and lentils Poultry, fish, and lean meats Seeds (e.g., sunflower, sesame) Bone broth or gelatin (for glycine) Eat Foods That Support Glutathione Metabolism Some foods contain small amounts of glutathione or help your cells upregulate its production and recycling: Spinach, avocados, and asparagus contain natural glutathione Whey protein (undenatured) is rich in cysteine and supports synthesis Plant compounds like those in turmeric may activate cellular antioxidant response pathways (e.g., Nrf2), increasing expression of glutathione-related enzymes Important note: Glutathione from food is largely broken down during digestion, so these foods help mainly by supplying building blocks and activating your bodys own glutathione production
But I found out that chlorophyll increases cell turnover, meaning it speeds up the rate your skin produces new skin cells