Spinach powder is made from fresh spinach leaves (Spinacia oleracea). The leaves are washed, trimmed, diced, dried, and ground into a fine powder.
Spinach is a good source Iron and other micronutrients such as Potassium, Vitamin A, and lutein.1 Spinach is also a good source of nitrates, which may improve cardiovascular health by lowering blood pressure and maintaining the normal function of blood vessels (endothelial function).2-4 Spinach consumption rich in lutein may help maintain eye health by increasing blood lutein level and macular pigment optical density.5
National Nutrient Database for Standard Reference. Spinach, Raw. United States Department of Agriculture (USDA). http://ndb.nal.usda.gov/ndb/foods/show/3202?fgcd=&manu=&lfacet=&format=&count=&max=35&offset=&sort=&qlookup=SPINACH
Liu AH, Bondonno CP, Croft KD, Puddey IB, Woodman RJ, Rich L, Ward NC, Vita JA, Hodgson JM. Effects of a nitrate-rich meal on arterial stiffness and blood pressure in healthy volunteers. Nitric Oxide. 2013 Nov 30;35:123-30. doi: 10.1016/j.niox.2013.10.001. Epub 2013 Oct 10. PubMed PMID: rac.
Jovanovski E, Bosco L, Khan K, Au-Yeung F, Ho H, Zurbau A, Jenkins AL, Vuksan V. Effect of Spinach, a High Dietary Nitrate Source, on Arterial Stiffness and Related Hemodynamic Measures: A Randomized, Controlled Trial in Healthy Adults. Clin Nutr Res. 2015 Jul;4(3):160-7. doi: 10.7762/cnr.2015.4.3.160. Epub 2015 Jul PubMed PMID: 26251834; PubMed Central PMCID: PMC4525132.
Bondonno CP, Yang X, Croft KD, Considine MJ, Ward NC, Rich L, Puddey IB,Swinny E, Mubarak A, Hodgson JM. Flavonoid-rich apples and nitrate-rich spinach augment nitric oxide status and improve endothelial function in healthy men and women: a randomized controlled trial. Free Radic Biol Med. 2012 Jan 1;52(1):95-102. doi: 10.1016/j.freeradbiomed.2011.09.028. Epub 2011 Oct 1. PubMed PMID: 22019438.
Kopsell DA, Lefsrud MG, Kopsell DE, Wenzel AJ, Gerweck C, Curran-Celentano J. Spinach cultigen variation for tissue carotenoid concentrations influences human serum carotenoid levels and macular pigment optical density following a 12-week dietary intervention. J Agric Food Chem. 2006 Oct 18;54(21):7998-8005. PubMed PMID: 17032001.