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N, N-dimethyl glycine(DMG),a food supplement, is claimed to be non-toxic and is known for its immunoprotective and stamina building property. It improves CNS functions,mainly speech in autistic children, causes behavioral improvement and decreases seizures. To study its effect on the neurons on the ventral half of the cervical enlargement of the spinal cord, DMG dissolved in distilled water was given to 21 day old albino mice at a dose of 20mg/kg body weight per day for 30 days. The ventral half of the cervical enlargement of the spinal cord was studied morphologically. The results showed a significant decrease in the neuron count in the 15-25 micron range in the DMG-treated mice. No significant change was observed in the area of gray matter or white matter or total area. Neurons having a diameter of more than 25 microns showed no change in the cell count.These results suggest a cytotoxic damage caused by DMG.