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A TSH test is one important piece of the puzzle, but to truly understand whats happening, a range of tests is needed to help paint a complete picture of your thyroid function
Its also sourced from extrapolated animal research
The bloodbrain barrier (BBB) ingests iron through transferrin on brain capillary endothelial cells, and then transports it into the cerebral cytoplasm through astrocytes or through divalent cation-binding protein (DMT1) and maintains iron an approximately saturated steady state in the brain (Belaidi and Bush, 2016), thereby maintaining the normal physiological function of the nervous system
Have you tried B12 injections/shots
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