Berberine Extract (97% Berberine HCl): verification pending

References

1. A 2025 pharmacology review found that berberine activates AMPK to support fat breakdown and suppresses PPAR-γ signaling involved in fat-cell formation, while noting that berberine's own oral bioavailability is under 1% — a key reason researchers are exploring formulation and absorption strategies to optimize its use. PubMed
2. A 2024 pharmacology review reported that berberine influences glucose metabolism, fat metabolism, and gut microbiome composition, and noted neuroprotective properties observed in various neurodegenerative and neuropsychological models — though the review cautioned that human evidence for some of these effects, particularly aging-related outcomes, remains more limited. PubMed
3. A 2020 pharmacology review proposed that berberine's wide-ranging effects — despite its own poor bioavailability — may be explained by its action on the gut microbiota, reporting that berberine reversed pathological shifts in gut bacterial composition across preclinical models of obesity, hyperlipidemia, and diabetes. PubMed
4. A 2017 pharmacology review reported that although berberine itself has very low oral bioavailability due to extensive first-pass metabolism, several of its active metabolites (including berberrubine and demethyleneberberine) retain comparable antioxidant, anti-inflammatory, hypolipidemic, and hypoglycemic activity — suggesting the compound's benefits may be carried forward by its metabolites even with limited absorption of the parent molecule. PubMed