English Translation
I am concerned about your health.
Gemini says:
“Je suis préoccupé par ta santé” is grammatically correct for “I am concerned about your health.” but it sounds quite serious and slightly formal.
It sounds a bit like a doctor speaking to a patient, or a very serious conversation where you are analyzing the situation.
If you want to sound more caring or emotional (which is usually how “I am concerned” is meant in English),
-
The Most Natural Way (I am worried)
“Je m’inquiète pour ta santé.” (I worry about your health.) -
The “Caring/Warm” Way
“Je me fais du souci pour ta santé.” (I am fretting/worrying about your health.)