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Nation et al., 2019

(3) Essential amino acids for immune functioning Proteins and their amino acids play a pivotal role in the proper functioning of your immune system because certain essential amino acids such as arginine, glutamine, and cysteine have direct roles in your bodys immune responses: Arginine regulates the function of immune cells like T-cells, which are central to the immune response against pathogens

Nearly half of the bacteria comprising the human gut microbiome are unable to produce NAD + de novo and rely on NAD + precursors available in the environment for their metabolic functions 59,60

*Correspondence: Wei Zhang, [email protected]

September 22, 2021