Q. Consider the following statements regarding Monosodium Glutamate (MSG):

1. MSG is a sodium salt of an amino acid.
2. MSG acts as the excitatory neurotransmitter in the mammalian central nervous system.
3. MSG is believed to cause the so-called "Chinese restaurant syndrome".

Which of the above statements is/are correct?
Answer: 1, 2 and 3
Notes: Monosodium glutamate (MSG) is the sodium salt of glutamic acid, an amino acid. Glutamate acts as an excitatory neurotransmitter in the mammalian CNS. MSG, when consumed in large amounts, has been linked to "Chinese restaurant syndrome", a controversial set of symptoms, but all three statements are factually accurate regarding MSG’s characteristics and effects.