Links for further study on Nitric Oxide:

Impact of Nitric Oxide on Metabolism in health and age related disease
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3988980/

Impact of Nitric Oxide in health and disease of the nervous system
http://www.ncbi.nlm.nih.gov/pubmed/18715148

Glycine propionyl-L-carnitine increases plasma nitrate/nitrite in resistance trained men
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2211291/

Relationship between vascular endothelium and periodontal disease in atherosclerotic lesions
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4306203/

Benefits on Nitric Oxide on Diabetics

REGULATION OF OBESITY AND INSULIN Resistance by Nitric Oxide
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4112002/

Endothelial Dysfunction and Diabetes: Effects on Angiogenesis, Vascular Remodeling, and Wound Healing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3348526/