Medium chain acyl dehydrogenase deficiency (MCADD) – Symptoms 

Those affected by medium chain acyl dehydrogenase deficiency (MCADD) usually do not show any symptoms until they are between three months and three years old, usually after a period of fasting, infection or stress.

Symptoms vary, but may include:

• drowsiness
• lack of energy
• diarrhoea
• vomiting
• low blood sugar level

Complications

In rare cases, the child may experience serious complications, such as:

• seizures
• breathing difficulties
• liver problems
• brain damage
• coma
• sudden death