Can you tell me some advice for reducing anxiety with diet?

The biggest issue is: To reduce caffeine in your diet. Add in omega 3 fatty acids. Talk about feelings ; address problems. Don't avoid them. Aim for 7.5 - 8 hours of sleep/ night. Daily physical activity is optimal in a green space. Eat healthfully. Cut out junk carbs, caffeine ; alcohol (or moderate). Try qi gong, tai chi, acupuncture, acupressure, homeopathy, meditation, yoga ; an exercise program.

Avoid caffeine. : Either moderate alcohol use or don't drink. Try to avoid junk carbohydrates. Omega 3 fatty acids help the brain. Think fish (but watch out for fish that tend to have high mercury levels). A cup of chamomile tea or green tea (decaf) can be very soothing. Go for at least 5 servings of vegetables and 4 servings of fruit per day. Stay well hydrated - 64 or > ounces per day. Take care.