"When most people ingest alcohol, which contains ethanol:
An enzyme called alcohol dehydrogenase (ADH) helps metabolize (process) the ethanol.
Your liver converts the ethanol to acetaldehyde, a substance that can cause cell damage.
Another enzyme called aldehyde dehydrogenase 2 (ALDH2) helps convert acetaldehyde to acetic acid (vinegar), which is nontoxic.
In people with alcohol intolerance, a genetic mutation (change) makes ALDH2 less active or inactive. As a result, your body can’t convert acetaldehyde to acetic acid. Acetaldehyde starts to build up in your blood and tissues, causing symptoms."
Never. I have this weird thing where my liver doesn't process it correctly. If I have one beer I'll throw up for 3 days.
https://my.clevelandclinic.org/health/diseases/17659-alcohol-intolerance
"When most people ingest alcohol, which contains ethanol:
An enzyme called alcohol dehydrogenase (ADH) helps metabolize (process) the ethanol.
Your liver converts the ethanol to acetaldehyde, a substance that can cause cell damage.
Another enzyme called aldehyde dehydrogenase 2 (ALDH2) helps convert acetaldehyde to acetic acid (vinegar), which is nontoxic.
In people with alcohol intolerance, a genetic mutation (change) makes ALDH2 less active or inactive. As a result, your body can’t convert acetaldehyde to acetic acid. Acetaldehyde starts to build up in your blood and tissues, causing symptoms."
Sorry to hear, hopefully you didn't have to learn it the hard way
Oh, man, DID I...