I would grade the quality of the metanalysis as C level but the findings may lead to more insights. (Examine summary followed by original paper.)
Detail on “purified.”
MEDOX (also identified as MP865) is a unique combination of anthocyanins obtained by purification from black currants (Ribes nigrum L.) and from bilberries (Vaccinium myrtillus). The purification process (MEDOX is made in an in-house developed,
high tech., patented, chromatographic process) yields highly purified anthocyanines presented as capsules of 80 mg pure anthocyanins plus 115 mg polyphenols.
I agree the pills would be a standardized formula and more consistent, but these studies on aronia talk a lot about curing metabolic syndrome etc… and I have to wonder if it is because they feed the akkermansia muciniphila: