l carnitine and l theanine together 1000 mg by Now Foods L-Theanine — Medicine Center Pharmacy
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doi: 10.1016/0014-2999(96)00343-3

doi:10.3389/fcvm.2019.00096 Mubashir T, Abrahamyan L, Niazi A, et al

Coactivation of NMDA receptors by glutamate and D-serine induces dilation of isolated middle cerebral arteries

doi: 10.1016/S0140-6736(21)00218-X 5

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