I believe the name-brand medications come from the medication maker themselves, and the pricing is set by the manufacturer
The studies are summarised in Table 2
Europe Glutathione Market Trends Europe is positioned to hold approximately 22% of the global glutathione market in 2025, with Germany, the United Kingdom, and France emerging as the primary regional catalysts for growth
Collagen is often called the "foundation of youthful skin"
Additionally, it can inhibit the production of IL-1, TNF-, and cartilage-degrading matrix metalloproteinase-3 (MMP-3), blocking cartilage degradation, which may help in OA prevention and treatment
Food Res Int 112:25062 Ghosh S, Whitley CS, Haribabu B, Jala VR (2021Feb 18) Regulation of intestinal barrier function by microbial metabolites