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However, the absorption of oral vitamins is often influenced by several factors that impact their bioavailability and effects on our health

Lavigna G, Masone A, Bouybayoune I, Bertani I, Lucchetti J, Gobbi M, Porcu L, Zordan S, Rigamonti M, Imeri L, Restelli E, Chiesa R (2021) Doxycycline rescues recognition memory and circadian motor rhythmicity but does not prevent terminal disease in fatal familial insomnia mice

Surplus vitamin is excreted harmlessly in the urine as it is water-soluble

BPC-157 appears to be an exception in animal studies: it retains biological activity when administered intragastrically in rats and mice, including in colitis and ulcer models