Finally, return to sourcing because it is where the abstract regulatory status becomes a concrete safety problem
Quercetin and the related flavonoid fisetin occur in foods, quercetin in onions, capers, and apples and fisetin in strawberries, at amounts far below the trial doses, and whether food-level intake does anything for senescent cells has not been tested
Corticosteroids concerns: Oral or injected corticosteroids (prednisone, cortisone) can impair healing and cause bone loss with prolonged use
(PubMed) Valuck RJ, Ruscin JM
Similarly, individuals with certain blood cancers may present with unexplained weight loss, night sweats, or lymphadenopathy