What constitutes a suitable dosage will depend on the condition you wish to address, for example for blood sugar effects a dose of 500mg, taken three times daily after meals, has been reported to work well. It should be noted, that there is more for us to learn with regards berberines clinical effects and more high-quality studies needed
Dapagliflozin in heart failure with mildly reduced or preserved ejection fraction
It may result in small pustules (pimples) at the base of a hair shaft on inflamed, congested skin
Javaheri S, Barbe F, Campos-Rodriguez F, Dempsey JA, Khayat R, Javaheri S, et al
Aging leads to skin collagen decrease and deformation, and subsequent wrinkle formation 58,59
Carnitinemetabolism and functions