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collaborated with post-graduate student R

For example, glutamine competition between glutamine-addicted breast cancer cells and anti-tumor T lymphocytes impairs T cell activity and targeting GLS in tumor cells reduced tumor growth and metastasis and improved T cell activation [49, 84]

[PubMed] [Google Scholar] Yamada K, Tsuji T, Kunieda T

Also it's worth noting that if you have blood work conducted and it returns as falling within "the normal range" then know that "normal" does not equal optimal and therefore, if you do suffer any of the symptoms noted above with "normal levels" then you may well benefit from the extra boost