Among the most common modifications is PEGylation, which involves attaching PEG chains to the NP surface
(Source) Heres a review of several BPC-157 studies

Ingredients: Water/Aqua/Eau, Lactic Acid , Polylactic Acid (derived from corn starch or sugar cane) , Helianthus Annuus (Sunflower) Seed Oil, Cetearyl Alcohol, Propanediol, Ceteareth-20, Beraclay Light Red, Hamamelis Virginiana (Witch Hazel) Water, Panax Ginseng Root Extract, Carica Papaya (Papaya) Fruit Extract , Saccharum Officinarum (Sugar Cane) Extract , Acer Saccharum (Sugar Maple) Extract, Cucumis Sativus (Cucumber) Fruit Extract, Citrus Aurantium Dulcis (Orange) Fruit Extract, Citrus Limon (Lemon) Fruit Extract, Vaccinium Myrtillus Fruit Extract, Hydroxyethylcellulose, Polyglceryl-3 Cocoate, Butylene Glycol, Maltooligosyl Glucoside, Glyceryl Stearate, PEG-100 Stearate, Caprylic/Capric Triglyceride, Dipentaerythrityl Tri-Polyhydroxystearate, Hydrogenated Starch Hydrolysate, Phenoxyethanol, Caprylyl Glycol, Sodium Hydroxide, Xanthan Gum, Polyglceryl-4 Caprate, Polyglceryl-6 Caprylate, Polyglceryl-6 Ricinoleate, Pentylene Glycol, Sorbic Acid, Hydroxyphenyl Propamidobenzoic Acid, Ascorbyl Palmitate, Benzoic Acid, Tocopherol This has a fairly dense physical scrub so I only need to use it twice a week to maintain glowiness and keep skin congestion at bay

Rivas-Chacn, L
The first is simply getting more glutathione from your food
doi: 10.1016/j.arr.2024.102294 35 MaJLiYYangXLiuKZhangXZuoXet al