Some researchers speculate that oxidative stress may be a cause of fibro symptoms. Oxidative stress occurs when the body doesn’t produce enough antioxidants to battle cell-damaging free radicals in the body. Most fruits and veggies are packed with important antioxidants, like vitamins A, C, and E, which fight free radicals to keep your body normalized. Certain studies also show a raw, vegan diet can improve symptoms, but that’s difficult for most people to follow. If you do choose to eat meat, though, opt for a small portion of grass-fed beef. “It is an excellent source of iron and vitamin B12, both nutrients which are extremely important in keeping your pain-processing nervous system healthy,” says Holton.