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by seanp2k2 3542 days ago
Not a great source but it's in these and works for me: https://nootrobox.com/go-cubes

No jitters but if I take all 4 at once I get a pretty unpleasant "coming up" feeling for about 15 minutes. I usually just have 2 a day, and I'd recommend people start with 1 just in the morning.