Experimentally, excessive administration of MSG leads to elevated amounts of glutamic acid in the blood, resulting in glutamate overload that bypasses blood-brain barrier regulation, overactivating NMDA receptors, and triggering cascades that disrupt neuronal homeostasis 5,9
B 6 deficiency influences both the innate and adaptive immune systems, reducing the number, activity and proliferation of immune cells, impairing the growth and maturation of lymphocytes, affecting the production of antibodies by B cells, and reducing the size of the thymus gland [22]
So you are optimally supplied with selenium
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4) 174,175 and this pool increases with age