Increasing gamma-aminobutyric acid (GABA) and balancing glutamate, brain chemicals called neurotransmitters, may help alleviate symptoms of fibromyalgia (FMS) and chronic fatigue syndrome (ME/CFS).

The researchers genetically engineered the three types of neuron — which release the neurotransmitters GABA, glutamate and serotonin — in the median raphe nucleus of mice to express a light ...