So I've been taking some supplements for a little less than a week, and so far I'm fairly disappointed. My stack is 300mg Choline (APC), 10mg Vinpocetine, 10mcg Huperzine A, and 400mg Oxiracetam twice a day (three times a day on the racetam), with some Thiamine and about 5mg PRL-8-53 in the morning. From what I have read this should be a fairly effective cholinergic stack helping with focus and memory, but so far I'm not seeing it. For the record, I started off taking 800mg of the racetam twice a day, but that was just giving me headaches and making it hard to concentrate, so I switched to 400 x 3. Should I just wait longer to get the effects, or make some kind of change? Is my brain weird because I'm not really getting significant benefits? Thanks for any advice.