In general, people with chronic fatigue syndrome should eat healthy foods, eat smaller meals, and eat more frequently. Skipping meals can bring on chronic fatigue symptoms and drain your energy so be sure to eat on a regular schedule. Some patients with chronic fatigue syndrome find that stimulants such as caffeine can cause setbacks and zap their energy. For some people, caffeine is helpful because it helps with circulation of blood and it has a stimulant property. For others it can cause to lose too much urine. It has a diuretic property, so people have to be cautious. Evaluate whether caffeine affects you in a bad way, and if it does, try to avoid it.
Research shows that chronic fatigue syndrome is related to blood flow to the brain. It is better to avoid anything that will increase adrenaline hormone. Foods like sugar will increase blood sugar and comes down rapidly. Too much sugar can cause lighter headaches so get it back up into the normal range later, there is an adrenaline surge that can contribute to lightheadedness for people with CFS. Avoid eating too much sugar.