Wouldn't people who claim glutamate (MSG) allergies immediately die, since it's also a neurotransmitter?
(title)
Very high caffeine tolerance (weirdly: sometimes not) as a non-regular coffee drinker
If I just had high caffeine tolerance I’d guess it’s either because of fast caffeine metabolism or my ADHD. Sometimes a regular cup of coffee is more than enough to wake me up and improve my ability to concentrate and sometimes not even a 4x Espresso is enough, with no discernible reason why. I have tried drinking coffee on...