• lose their sight or hearing
• suffer muscle weakness and pain
• be unable to walk, eat, swallow or talk normally
• have strokes or seizures
• develop liver disease or diabetes
• suffer heart, respiratory or digestive problems
• experience developmental delays or intellectual disability.
Needing to stay in bed to rest and recharge is a common outward symptom of mitochondrial disease. Inside the body, mitochondrial disease may literally cause any symptom in any organ at any age.