When I first used this product my stomach hurt and so did it couldn't stand the gym. I've used Target's C4 Regular in the past and never had a problem. This is the first time I'm testing the Extreme version. The second and last time I drank the extreme version, I felt like I was dying. The difference between the first and second time is that I drank it all. The pain was severe and I struggled for hours. If it wasn't for Covid I would have gone to the ER. If you survive this pain take the bellies and Pepto. To drink tea. Rub some Chinese medicine on your stomach. Take a bath with very hot water and then turn on a very hot shower so there is no pain. I'm not sure what saved me, or maybe it's a combination of both. I had to lie on my stomach but kept moving because of the pain. Because it was within 12 hours. My back started hurting. Eventually I fell asleep and when I woke up he was gone. I'm not sure if this is a product or if I can't handle extremes. All I know is that I've been using pre-workouts, heavy to light, for years, and it's never happened to me. Maybe it's my age (45) and now I can't handle the extreme. Just be very careful and I'll take a few sips to make sure you can handle this extreme. Good luck and be careful.
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