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Table 1 The percentage of subjects reporting side effects at least once over the 5 days of intervention

From: Headache and mechanical sensitization of human pericranial muscles after repeated intake of monosodium glutamate (MSG)

Side effect MSG Placebo McNemar’s test
Nausea 57.1 21.4 P = 0.182
Headache* 57.1 7.1 P = 0.041
Dizziness 35.7 0.0 P = 0.074
Chest Pressure 28.6 0.0 P = 0.134
Burning 21.4 7.1 P = 0.617
Fatigue 50.0 28.6 P = 0.074
Sore Jaw 57.1 35.7 P = 0.450
Stomachache 35.7 7.1 P = 0.134
Other* 57.1 14.3 P = 0.023
  1. Other included reports of numbness in appendages, feeling cold, and heartburn.