Rapid Weight Loss Mostly, this is a combination of fat hate and my own condition. So i noticed i went on keto or whatever, and it helped tremendously for my asthma. The big issue is my body kinda kept going to the beyond realm. Originally i wanted to lose 10 pounds, but ended up losing 30 pounds instead. It's completely possible to lose weight and easily honestly. However, this weight loss has lead to some nasty side effects, and im not sure why. For example, i routinely have random tachycardia when sitting down. I also have a fealing of weakness in my chest, followed by abdominal pain when breatihing. Worst of all my saturation level drops to the low 70s during sleep, which is interesting.  The worst is that my brain gets viscerally angry at the thought of eating, like even though i lost so much weight, my body still feels bloated and gassy. Its weird what rapid weight loss will do to you