It’s all the chemicals they add to the wine
Everybody has their pet theory.
In Napa they add sulfites and other allowed chemicals to the wine to keep it from spoiling
Other wine regions do too
Only red wine gives me headaches. Does this mean they don’t put preservatives in white wine?
And the alcohol.
Also less tannins. And histamines in other foods don’t bother me.
It’s the staggering amount of histamines in red wines that do it. And probably the amount of wine you drink.
I never drink enough red wine to stagger.