French phrase
J'ai une intolérance à ~.
Meaning
I have an intolerance to ___.
When to use it
It describes a physical reaction to certain substances. It is not necessarily the same as an allergy.
Example dialogue
On prend un verre ce soir ?
Are we getting a drink tonight?
J'ai une intolérance à l'alcool.
I have an intolerance to alcohol.