Yes!
Keep a food diary and mark down what foods make you feel sick and what specific symptoms you have. Report those to your doctor.
Some people have nightshade intolerances, oil intolerances, intolerances to additives and preservatives, gums and colorants, or foods that have certain classifications or characteristics.
Eating fresh foods that are not processed. (Making your own meals FROM SCRATCH.)
Eating organic fresh fruits and vegetables and meats not treated with chemicals/antibiotics can help.
If you eat any processed foods, read the labels carefully and avoid anything that triggers you.
Avoid drinking tap water.
Drink water filtered by reverse osmosis, activated charcoal and UV light.
Replenish filtered drinking water with minerals or take a multivitamin supplement.
Cease drinking water that is bottled in plastic or certain kinds of plastic, depending upon your sensitivity.
Do not heat food from any plastic containers in microwave.