Chinese restaurant syndrome!

Chinese restaurant syndrome, also called monosodium glutamate symptom complex, is a collection of symptoms which may include headache, flushing, sweating, and a sensation of pressure in the mouth or face. It is commonly believed that monosodium glutamate (MSG) is the cause, but a short-term scientific study showed no link.
Less common, but more serious symptoms attributed to the syndrome have included swelling of the throat, chest pain, heart palpitations, and shortness of breath. Most people recover from mild cases of Chinese restaurant syndrome with no serious harm. Symptoms of CRS can be eliminated by supplying a normal amount of vitamin B6 before consuming a meal rich in MSG.

According to neurobiologist Steven Rose: "The most common excitatory transmitter in the brain is the amino acid glutamate. [...] Glutamate also serves as a food flavouring in some cuisines, notably Chinese and Japanese, but if it is taken in excess in such diets, it can act as a neurotoxin by over-exciting glutamatergic synapses in the brain, [...] the so-called 'Chinese restaurant syndrome'."