Is Your Brain Shrinking ?

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A new study has shown that human brains tend to shrink over time; but that the brains of monkeys do not. Shrinkage of the brain means that there are a loss of cells, but why is it that monkeys do not experience this – yet humans do?
It is suggested that this shrinkage may be the price we must pay for our extended lifespans, but could it be something else?
The exposures and diet of a monkey are of course vastly different than that of our own – which opens the door to other explanations. Could it be toxicity instead of an extended life? For example: MSG, a common food additive – kills neurons in the brain, while other compounds such as Mercury and lead are brain toxic. How to protect yourself from toxins:
Stay away from mercury: fish, amalgams for fillings.
Stay away from lead, lead paints, etc.
Avoid MSG – eat food that you’ve prepared yourself.
Eat organic.
Eat raw food, provided it is safe.
Drink filtered water.
References:
http://www.livescience.com/15217-shrinking-brains-cost-longevity.html
http://www.msgexposed.com/msg-causes-rapid-brain-cell-death/