Several classes of non-OR ventilatory stimulants are currently being investigated with many acting in the brainstem respiratory network including D1-dopamine receptor agonists, 5-hydroxytryptamine receptor modulators, -amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid receptor agonists (ampakines), thyrotropin-releasing hormone, the endogenous peptide glycyl-glutamine, and phospodiesterase-4 inhibitors
Vitamin B12 testing often raises important questions, particularly for those at risk of deficiency or related health conditions
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Individual results are not established and should not be assumed
Other lifestyle interventions, such as adequate hydration, good sleep , and stress management are also important for overall health
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