How often? Well this is the first time it has happened in years to the point of throwing up. I have gotten headaches and weird detoxy sensations neck tensions, heavy head... but not having to vomit.
It never has ever happened after a fatty meal.
35 years old.
Not allergic to MSG. But never ever eat the stuff anyway. Very conscious eater here.
Dont eat Soy.
Sometimes what would bring this on in the past is if if I was cold for a long period of time, out and about outside, and couldn't get warmer, Then hours later late at night... this would happen.