There are several limitations to this study
You can continue taking it unless your physician advises otherwise
The USDA Agricultural Research Service used the 148 pmol/L threshold in their national prevalence studies, and the NIH Office of Dietary Supplements acknowledges that lab reference ranges can vary between institutions
[Google Scholar] Kodym R, Calkins P and Story M
Benefits Reduces pigmentation Promotes glowing skin Controls oil Removes tan How to Use Apply to wet face, massage gently, rinse, use twice daily
This suggests that a resistance exercise-related mechanism of inducing plasma NO, perhaps due to increased shear stress that triggered an up-regulation in NO-cGMP signaling along with a slow, sustained release of NO from GSH + CIT, may be a conceivable candidate for this response