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Dr. Mark Rudderham -
Dr. Lance Hering ND -
Dr. Matthew Fisel -
Deepak Chopra MD -
Andrew Weil, MD -
Dr. Tricia Pingel, NMD -
Scott Gerson, MD, PhD - Ayurvedic Physician -
Dr. Ron Klatz. MD, DO -
Mark Force, DC -
Dr. Holly Lucille, ND, RN -
Dr. Trevor Cates -
Steven V. Joyal, MD -
Paula Owens, MS, Nutrition -
Lloyd G .Wright, LAc -
Bruno Chikly, MD, DO, LMT -
Cindy Schneider, MD -
Dr. Z, N.D., AHG -
Matthew J. Taylor, PT, PhD -
David Carfagno, D.O., C.A.Q.S.M. -
Robert Doane, LAc, MS -
Dr. Ron Schmid -
Dr. Bronner Handwerger -
Daemon Jones, ND -
Dr. Ed Bauman, PhD -
Dr. Sandra Olic -
Debra Greene, Ph.D -
Dr. Thomas Lodi, MD, CNS -
Carolyn Dean, MD, ND -
Leon Chaitow, ND DO -
Stephen Schimpff, MD -
Dr. Himanshu Shukla, MD -
Hillel Mazansky, M.D. -
Dr. Theresa Ramsey -
Dr. Manolis -
Dr. Mark R. Engelman, M.D.
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Spinach
Spinach is extremely rich in antioxidants when fresh, steamed, or quickly boiled. It is a rich source of vitamin A (and especially high in lutein), vitamin C, vitamin E, vitamin K, magnesium, manganese, folate,betaine, iron, vitamin B2, calcium, potassium, vitamin B6, folic acid, copper, protein, phosphorus, zinc, niacin, selenium and omega-3 fatty acids. Recently, opioid peptides called rubiscolins have also been found in spinach.
Polyglutamyl folate (Vitamin B9 or folic acid) is a vital constituent of cells and spinach is a good source of folic acid, but boiling spinach can more than halve the level of folate left in the spinach, but microwaving does not affect folate content. Vitamin B9 was first isolated from spinach in 1941.
Iron
Spinach, along with other green leafy vegetables, is considered to be a rich source of iron. For example, the United States Department of Agriculture states that a 180 gserving of boiled spinach contains 6.43 mg of iron, whereas one 170 g ground hamburger patty contains at most 4.42 mg.
Calcium
Spinach also has a high calcium content. However, the oxalate content in spinach also binds with calcium, decreasing its absorption. Calcium and zinc also limit iron absorption. The calcium in spinach is the least bioavailable of calcium sources. The body can absorb about half of the calcium present in broccoli, yet only around 5% of the calcium in spinach.