It is added to just about every fast food product and most processed foods. MSG is made from fermented carbohydrates such as starch, sugar beets, molasses and cane sugar.
MSG is listed among food additives (along with certain sweeteners such as sucralose) that have come to be known as Excitotoxins. Studies have shown that these Excitotoxins have a direct relationship to the neurodegenerative disorders mentioned earlier, due to their ability to cross the blood-brain barrier and create lesions on the surface of the brain.
On the other hand, RNA or ribonucleic acid is one of the finest brain foods on the planet. It is actually a molecule that is critical to the synthesis of proteins. It counteracts the effects of aging, improves memory retention and learning ability, is a powerful antioxidant and increases energy.
Learning and long term memory require the synthesis of new proteins and this is where RNA comes in. Major food sources include yeast, fish, beans, nuts and green algae. Chlorella is a great source of RNA.
So, basically you have a choice. You can eat fish, nuts and beans and improve your mental health or you can eat processed foods and allow it to deteriorate.