It appears that, if one is going to supplement with blueberry extract to get the anthocyanin effect on cognition, dosages of somewhere between 5.5 and about 11 grams seem optimal with the higher-end, closer to 10 or 11 grams, being more beneficial. The blueberry-eaters out there, like me, who prefer to get their anthocyanins from the actual berries—it appears that somewhere between 60 to 120 grams of fresh blueberries each day is the way that you can get sufficient anthocyanins to shift your system or bias your brain toward these enhanced cognitive effects.