Doctors' Research
100% Whole Food Supplements for Healthcare Professionals

Doctors' Research, Inc. is dedicated to providing the highest quality nutritional supplements, in a form that is as close as possible to those naturally found in foods. It is well understood by nutrition researchers that we, as humans, should derive nutrition from food. It is our goal at Doctors' Research to provide the best, scientifically researched, natural food supplements which meet the needs of those who live in our "modern" society. Doctors' Research products are environmentally friendly. They are natural food complexes which have been shown to be better for the internal human environment. They are supplied in recyclable glass bottles which we feel are better for the global environment (as well as the supplement's environment).

Who heads up the research team at Doctors' Research?
The research group at Doctors' Research is directed by Robert Thiel, N.H.D. who also holds a Ph.D. in nutrition science. He is licensed as a naturopath by the State of North Carolina, registered as a naturopath by the District of Columbia, and is licensed as a naturopathic physician within Idaho. He maintains a natural health clinic in Arroyo Grande, California.

DR. THIEL conducts lectures for health care professionals on a variety of natural health topics; he has also written four books for health care professionals. He has conducted, and had published, many scientific health studies. Thiel received the Leadership Award from the Orthomolecular Health Medicine Society. Thiel has been named Research Scientist of the Year, Physician of the Year, and Disability Researcher of the Year by the largest American naturopathic association. Doc. Thiel has had the only comprehensive paper published in a medical peer-reviewed journal (Medical Hypotheses) on the advantages of natural food vitamins over synthetic 'nutrients'.

Why are Doctors' Research Food nutrients better than isolated USP nutrients?
Human beings should get their nutrition from foods. "The body is designed to handle foods" [1]. It is important to realize "that in nature vitamins are never isolated. They are always present in the form of vitamin-complexes" [2-5]. Vitamins are natural complexes which produce a variety of actions in the body whereas some isolated USP vitamins are analogues of vitamins which appear to have at least some of these activities [5]. Food nutrients are complexed just as nutrients found in all foods, because they are food. USP vitamins are synthesized (according to strict federal standards), standardized chemical isolates (as listed in the United States Pharmacopoeia or the USAN and USP Dictionary of Drug Names) [6]; they are not food.

Vegetarian FOOD Nutrient		Compared to USP/Mineral Salt
Vitamin A		More complete, as scientists teach that vitamin A is not an isolate [13]
Vitamin B-9		More utilizable above 266mcg (Recommended Daily Intake is 400mcg) [14]
Vitamin C		Over 15.6 times antioxidant effect [15]
Vitamin D		Over 10 times the antirachitic effect [16]
Vitamin E		Up to 4.0 times the free radical scavenging strength [17]
Vitamin K		Safer for children [18]
Calcium		7 times as effective in raising serum ionic calcium levels [19]
Chromium		Up to 25 times more bioavailable [20]
Iron		Non-constipating, better absorbed [21]
Magnesium		Better absorbed and retained [22]
Selenium		Nearly 2 times better retained [23]
Zinc		Better absorption, better form [24,25]

Numerous university studies have concluded that supplements containing food nutrients are better than USP isolates. Food nutrients are better because they contain important enzymes, peptides, and phytonutrients CRITICAL to the UTILIZATION of vitamins and minerals which are not present in isolated USP nutrients. Published research has concluded that food vitamins are superior synthetic/USP vitamins.

References:
[1] Whitney EN, Hamilton EMN. Understanding Nutrition, 4th ed. West Publishing, New York, 1987
[2] Airola P. How to Get Well. Health Plus, Sherwood (OR), 1989
[3] Olson JA. Vitamin A, retinoids, and carotenoids. In Modern Nutrition in Health and Disease, 8th ed. Lea & Febiger, Phil.,1994:287-307
[4] Farrell PA, Roberts RJ. Vitamin E. In Modern Nutrition in Health and Disease, 8th ed. Lea & Febiger, Phil.,1994:326-358
[5] DeCava JA. The Real Truth about Vitamins & Antioxidants. A Printery, Centerfield (MA), 1997
[6] The United States Pharmacopeial Convention. USAN and USP Dictionary of Drug Names. Mack Printing, Easton (PA),1986
[7] Turnland JR. Bioavailability of dietary minerals to humans: the stable isotope approach. Crit Rev Food Sci Nutr,1991;30(4);387-396
[8] Schumann K, et al. Bioavailability of oral vitamins, minerals, and trace minerals in perspective. Arzneimittelforshcung,1997;47(4):369-380
[9] Ha SW. Rabbit study comparing yeast and isolated B vitamins (as described in Murray RP. Natural vs. Synthetic. Mark R. Anderson, 1995, p:A3). Ann Rev Physiol,1941; 3:259-282
[10] Thiel R. Natural vitamins may be superior to synthetic ones. Med Hypo.2000;55(6):461-469
[11] Thiel R.J, Fowkes S.W. Can cognitive deterioration associated with Down syndrome be reduced? Medical Hypotheses, 2005; 64(3):524-532
[12] Traber MG, Elsner A, Brigelius-Flohe R. Synthetic as compared with natural vitamin E is preferentially excreted as alpha-CEHC in human urine: studies using deuterated alpha-tocopherol acetates. FEBS Letters, 1998;437:145-148
[13] Ross A.C. Vitamin A and Carotenoids. In Modern Nutrition in Health and Disease, 10th ed. Lippincott William & Wilkins, Phil, 2005: 351-375
[14]Lucock M. Is folic acid the ultimate functional food component for disease prevention? BMJ, 2004;328:211-214
[15] Williams D. ORAC values for fruits and vegetables. Alternatives, 1999;7(22):171
[16] Thiel R. Vitamin D, rickets, and mainstream experts. Int J Naturopathy, 2003; 2(1)
[17] Traber MG. Vitamin E. In Modern Nutrition in Health and Disease, 9th ed. Williams & Wilkins, 1999:347-362
[18] Olson R.E. Vitamin K. In Modern Nutrition in Health and Nutrition, 9th ed. Williams & Wilkins, Balt., 1999: 363-380
[19] Hamet P, et al. The evaluation of the scientific evidence for a relationship between calcium and hypertension. J Nutr, 1995;125:311S-400S
[20] Ensminger AH, Ensminger ME, Konlade JE, Robson JRK. Food & Nutrition Encyclopedia, 2nd ed. CRC Press, New York, 1993
[21] Wood R.J., Ronnenberg A.G. Iron. In Modern Nutrition in Health and Disease, 10th ed. Lippincott William & Wilkins, Phil, 2005: 248-270
[22] Rude R.K., Shils M.E. Magnesium. In Modern Nutrition in Health and Disease, 10th ed. Lippincott William & Wilkins, Phil, 2005: 223-247
[23] Biotechnology in the Feed Industry. Nottingham Press, UK, 1995: 257-267
[24] Andlid TA, Veide J, Sandberg AS. Metabolism of extracellular inositol hexaphosphate (phytate) by Saccharomyces cerevisiae. Int J. Food Microbiology. 2004;97(2):157-169
[25] King JC, Cousins RJ. Zinc. In Modern Nutrition in Health and Disease, 10 th ed. Lipponcott Williams & Wilkins, Phil., 2005:271-285

Some of these studies (citations) may not conform to peer review standards. Therefore the results are not conclusive. Professionals can, and often do, come to different conclusions when reviewing scientific data (peer-reviewed or not).