What is MSG?
Monosodium glutamate is the sodium salt of glutamic acid (present in most protein foods and which is a protein) and is obtained through a fermentation process from some products such as cane sugar or some cereals.
It then goes through a refining process to obtain the pure MSG. 
It consists of glutamate (glutamic acid), water and salt.
Other names monosodium glutamate
Monosodium Glutamate is also known as hydrolyzed protein, autolyzed yeast extract or the number E-621.
MSG and “Chinese restaurant syndrome”
The controversy has continued since 1968, Dr. Robert Ho Man Kwok, described a series of symptoms that some people allegedly feel after eating Chinese food.
Some of these symptoms include: headaches, asthma attacks, allergic reactions (mild to moderate), tachycardia, nausea, vomiting, tightness in the neck, face and chest and an overall feeling of discomfort. Symptoms are usually mild and momentary.
More recent studies, however, say there is no reaction and that in any case we are talking about a food allergy reaction or as may be to any other food.
Relationship between monosodium glutamate, excessive appetite and obesity
However if there is enough unanimity when it comes to its effect on appetite.
MSG, according to tests on animals, can produce an appetite (particularly 40% higher) and this implies that when we eat foods that contain ( snacks, hot dogs, chips, snacks, etc.). have the feeling of not being able to stop. This aspect may contribute to obesity as well talk about foods high in fat and calories.
Studies from the Complutense University of Madrid by Jesus Femández Tresguerres, director of the Department of Physiology, Faculty of Medicine, also go on line that MSG would affect parties and our brain that regulate appetite and satiety sensation.
It could also affect the production of growth hormone that is responsible for us to have more muscle, not excess fat.
People would stop using MSG in their diet might see reduced its voracious appetite with which they would find it easier to follow a diet and lose weight.
