5 Foods to Avoid If You Have Hypoglycemia: 1) Any food/drink with more than 15 grams of sugar; such as pastries, juice, and any white pasta, rice or bread. 2) Processed food; such as microwaveable foods, anything in a box or wrapper, and all fast foods. 3) Caffeine: anything above 4 ounces at one time will usually cause headaches, shakiness and dizziness.