You are seriously quoting an article written by what appears to be a college freshman trying to get some points for a lower division english class as scientific proof of something? To further the absurdity of the article, it quotes as relevant authorities the USDA, WHO and the Food and Agriculture Organization of the UN. None of those care about nutrition, they care only about pushing the products of their sponsor organizations, agribusiness, big pharma, and the petroleum/chemical industry. There was no information about disenting views, their scientific evidence, their arguments, or trully any evidence of them really existing. Therefore, I find your MSG argument unconvincing. Furthermore, it was irrelevant.
Now, McDonalds as a health food? The stuff at walmart is healthy? Have you seen people shopping at walmart? I have, they load up their carts with frozen pizza (carbs mostly), chips (carbs mostly), cookies (carbs mostly), soda (hfcs), pasta (more carbs), and maybe some diet soda if they are feeling like health nuts. An optimal human diet is composed primarily of fat (from animals fed a natural diet), lots of vegetables (for bulk and satiety), and moderate protein. The walmart diet offers none of that. Now if you got healthier eating a mcdonalds diet, I wonder what kind of garbage you were eating before. Were you living on twinkies and mountain dew?
Also, processed is very much unhealthy, that is how I call it cause I am informed. Try to get your information from agencies that don't have a vested interest and are not sponsored (bought) by companies with a vested interest.
As a bonus, here is a quote from one of the commenters on the site you linked:
scientists believe that primates are susceptible to excitotoxic damage[26] and that humans concentrate excitotoxins in the blood more than other animals.[27] Based on these findings, they claim that humans are approximately 5-6 times more susceptible to the effects of excitotoxins than rodents are.[28] While they agree that typical use of monosodium glutamate does not spike glutamic acid to extremely high levels in adults, they are particularly concerned with potential effects in infants and young children[29] and the potential long-term neurodegenerative effects of small-to-moderate spikes on plasma excitotoxin levels.[30]
http://en.wikipedia.org/wiki/G...