It has been suggested that the presence of S -lipoic acid in the racemic mixture may limit the polymerization of R -lipoic acid and enhance its bioavailability (52)
The FDA position on expired medications (and why biologics are different) The FDA takes a clear position: do not use medications past their expiration dates
For example, older mice given nightly melatonin had levels of oxidative damage markers in brain and liver comparable to much younger mice, and they maintained better learning/memory performance than unsupplemented old mice (Zhou et al., 2025)
Quality issues occasionally emerge
Collectively, these studies indicate that the antihypertensive effect of GLP-1 is mediated by its natriuretic effect on the kidneys, vasodilation on endothelial cells, and reduction of sympathetic activity on brain stem catecholamine neurons (95)
These potential advantages are class-level expectations for small-molecule GLP-1RAs, rather than established price outcomes