Food poisoning and stomach ache might trouble you big time if not taken a treatment on time. It is better to take a day off from work and tend to the needs of your body. Here is an example for sick day mail for food poisoning that you may use as reference.
Sample Food Poisoning Sick Leave Email Format
Date: July 10, 2022
This is to inform you that I will not be able to report to work due to a case of food poisoning. I have not been feeling the best of my health and would take a day off to rest and get better. For the same, I request you to grant me leave for the next two days.
I will be highly obliged to you for the same.