Bummer they only sell in 100g amounts. I was hoping to trial some over summer with intensive classes.
I usually don't like to mention vendors unless it's an review thread concerning vendors, but I picked my 25 grams from the relatively reputable ebay vendor called Vantagecc. The product is extremely pure. I have tried Nefi in the dose range of anything from 150mg to a little over 700mg. Too much makes you really drowsy and sleepy. I found my sweet spot to be at somewhere in the 250-350 mg range.
How would you describe that sweet spot?
Too little and I do not really experience anything. Too much and I feel like I'm falling asleep, feel very dull and unmotivated. I also may experience some impatience and short-temperedness when dealing even with my most close everyday human connections. My driving is impaired. It almost feels like I'm driving for the very first time.
The sweet spot is just great for studying and does not cause any of the negative effects I mentioned above. I feel calm, patient, motivated, very calculative and clear in the head while I stay fully awake without that annoying drowsiness I get when I cross the 500mg border. The prime time for studying is about an hour after ingestion (orally). I tend to get an annoying "hit" from Nefi and Noopept around 20-40 minutes after ingestion (depending on stomach contents) and my focus actually gets a little worse for a while. Fast forward 20 minutes or so and that annoying effect wears off and is replaced with clear headedness. The "sought after effects" wear off really slowly and I really haven't been able to tell when the effects have worn off completely.
I found Nefi to have great synergy with noopept. I have been on a relatively high daily intake of noopept (100mg per day) for quite an while now without any negative effects. I've sometimes taken days off from both nefi and noopept (or only one of them) to see if any cognitive withdrawal would be noticeable. However, I have not experienced any withdrawal from either.
As for me, the GABA down regulation has not been an issue with this dose range of Nefiracetam. (no side effects / withdrawal)