amount of debate in the nutrition field has never been greater.1, 2, 3 As Americans (and everyone in the world) gets progressively more obese, we seem to be digging into our respective trenches, saying âthis diet or that diet will cure all illsâ.4, 5 This is a sad waste of resources, and a little bit irresponsible, especially in a field where the endgame should be helping people â not furthering oneâs own agenda. Sure, you may say Iâm biased as well, writing this piece for The Paleo Diet. But the bottom line is, I care about peopleâs health more than I care about making money.
If you donât believe me, go ahead and take a look at my website Eat Clean Train Clean. See if I have anything for sale, or any agenda to be pushed. You will find that I have a nutrition lecture, with slides and scientific references for sale, for a whopping $2 â and thatâs it. And it isnât a âpro-Paleo, bash everything elseâ lecture. It highlights the science behind good nutritional choices. The long-winded opening here is simply to make a point: everyone who has a âbig voiceâ in nutrition â also has an agenda.6, 7, 8 And theyâre not going to stray from their agenda, because it might mean less book sales, less money and less of a voice.
Possibly the single best example of this is Dean Ornish.9 While at first glance Ornish seems like a great nutrition icon (after all, he pushes low fat diets, lots of vegetables, etc.) if you dig a little below the surface, you will find some rot.10 Okay â lots of rot.11 Did you know that Ornish is paid by McDonaldâs?12 Yes â that McDonaldâs. ConAgra and Pepsi Co. also have Ornish on the payroll.13, 14 Since we all clearly know that McDonaldâs, ConAgra and Pepsi are making us all healthier, we really should applaud Dr. Ornish for his work â right? My tongue is planted firmly in cheek on that one.
Nonetheless, because I firmly believe in unbiased science, if Ornishâs approach had some scientific merit, I would actually applaud him for some of his work (the Big Food work is never going to get my approval, but to each their own). But the simple fact is â Ornishâs approach has little-to-no scientific merit.15, 16 While he is indeed correct in stating that we all likely need to eat more vegetables, he goes far away from good science by virtually ignoring the huge problem of sugar â which is undoubtedly one of our biggest dietary downfall in the last 50 years.17, 18, 19 Is it a mere coincidence that if Ornish bashed sugar, he might lose his McDonaldâs, ConAgra and Pepsi deals? I think any astute reader will clearly be able to draw the obvious conclusion here.
If you havenât caught on to the fact that your favorite dietary âguruâ may just be cashing in on things, it may be a good idea to take a look around and do some internet searching â just to see what really goes on behind the scenes. If one wants to see some clear bias in action, go ahead and read Dr. Ornishâs piece for The New York Times.20 But this isnât to simply bash Ornish â like any headline-grabbing nutrition guru, he does offer some good advice. Because when it comes to nutrition, there are always some broad agreements that can be made.21, 22
No one will ever debate that organic vegetables should be included in every diet.23, 24 That is because they have clearly been found to support many different neuronal and physiologic processes.25 26, 27 Though Ornish himself ignores this next point (another nail in the coffin for his bias) almost everyone else agrees that good amounts of healthy fats are very beneficial (elements such as extra virgin olive oil, avocados, almonds, etc.).28, 29, 30 Another common point that nearly everyone agrees on? Eating organic, lean protein.31, 32, 33 This means wild caught salmon, organic chicken and other muscle-building sources of essential amino acids.
Another point that â again, everyone but seemingly Ornish â can agree on? Keep sugar to a minimum â especially added sugar.34, 35 Even the World Health Organization agrees on this point.36 If Ornishâs bias isnât crystal clear by now, then Iâd be shocked. You can also clearly see that I have yet to mention a Paleo Diet. Again, I am not biased. Does it happen that all of these points fall squarely under the Paleo Diet umbrella? Sure. But all of these elements also fall under the Mediterranean Diet umbrella â which nearly everyone in the nutrition world agrees â is extremely healthy.37 And guess what? The science backs up that diet, too.38
Even Dr. David Perlmutterâs often controversial ketogenic diet approach, is substantiated by sound scientific research.39 While one could argue the science doesnât quite back up all of Dr. Perlmutterâs conclusions yet, the point is he has salient scientific data to support his claims. And I do think one day he will end up being right about nearly everything he states in his book. Only time â and more scientific research â will tell.
So, when you look to indulge in a healthy diet, they may be confused by all of the noise in the media. At that point, I think it is important readers look to the science. And what does the science say? Avoid lots of sugar, eat lots of vegetables, eat lots of healthy fats, and consume quality sources of protein.40 That is all you really need, to put together a healthy diet.
Another huge issue here, which seemingly is only hinted at, is that people have trouble sticking to any diet.41 That is another discussion for another day, but the human factor must be weighed into the scientific debate, as well. The bottom line is, take care of yourself, worry only about your health, and not the back-and-forth bantering that goes on in the media.
There is very little new in the world of nutrition, and the same foods which have been helping humans thrive for centuries, will also be the ones we should keep consuming, since our physiology will not change enough by the time Iâm dead, or you are dead, to warrant brand new food choices. If you are overweight, think of all the food choices that led you to this state. Too much sugar? Too many processed foods? Not enough vegetables? Thatâs what I thought. You donât need to read biased, industry-backed propaganda to know what to eat. Intrinsically, youâve known all along.
 Willett WC. Diet and health: what should we eat?. Science. 1994;264(5158):532-7.
 Kornhuber J. [What should we eat?]. Fortschr Neurol Psychiatr. 2014;82(6):309-10.
 Adams SM, Standridge JB. What should we eat? Evidence from observational studies. South Med J. 2006;99(7):744-8.
 Roth J, Qiang X, MarbÃ¡n SL, Redelt H, Lowell BC. The obesity pandemic: where have we been and where are we going?. Obes Res. 2004;12 Suppl 2:88S-101S.
 Swinburn BA, Sacks G, Hall KD, et al. The global obesity pandemic: shaped by global drivers and local environments. Lancet. 2011;378(9793):804-14.
 Available at: http://www.npr.org/templates/story/story.php?storyId=6759000. Accessed May 5, 2015.
 Available at: http://www.nytimes.com/2007/01/09/health/09research.html. Accessed May 5, 2015.
 Available at: http://www.latimes.com/entertainment/tv/showtracker/la-et-st-dr-oz-hits-back-with-investigation-of-mysterious-critics-20150423-story.html. Accessed May 5, 2015.
 Available at: http://www.yourdoctorsorders.com/2011/12/the-ornish-myth/. Accessed May 5, 2015.
 Available at: http://www.menshealth.com/nutrition/high-protein-diets. Accessed May 5, 2015.
 Available at: http://articles.chicagotribune.com/1990-11-15/entertainment/9004040864_1_fat-diet-nathan-pritikin-diseased-arteries. Accessed May 5, 2015.
 Available at: http://www.weightymatters.ca/2007/02/dr-dean-ornish-shills-for-mcdonalds.html. Accessed May 5, 2015.
 Available at: http://www.foodonline.com/doc/dr-dean-ornish-endorses-conagras-natural-food-0001. Accessed May 5, 2015.
 Available at: http://www.hsc.wvu.edu/Wellness/Dr-Dean-Ornish-Program/Bio-Dean-Ornish.aspx. Accessed May 5, 2015.
 Available at: http://www.scientificamerican.com/article/why-almost-everything-dean-ornish-says-about-nutrition-is-wrong/. Accessed May 5, 2015.
 Gardner CD, Kiazand A, Alhassan S, et al. Comparison of the Atkins, Zone, Ornish, and LEARN diets for change in weight and related risk factors among overweight premenopausal women: the A TO Z Weight Loss Study: a randomized trial. JAMA. 2007;297(9):969-77.
 Yang Q, Zhang Z, Gregg EW, Flanders WD, Merritt R, Hu FB. Added sugar intake and cardiovascular diseases mortality among US adults. JAMA Intern Med. 2014;174(4):516-24.
 Ahmed SH, Guillem K, Vandaele Y. Sugar addiction: pushing the drug-sugar analogy to the limit. Curr Opin Clin Nutr Metab Care. 2013;16(4):434-9.
 Avena NM, Rada P, Hoebel BG. Sugar and fat bingeing have notable differences in addictive-like behavior. J Nutr. 2009;139(3):623-8.
 Available at: http://www.nytimes.com/2015/03/23/opinion/the-myth-of-high-protein-diets.html. Accessed May 5, 2015.
 Liu RH. Health-promoting components of fruits and vegetables in the diet. Adv Nutr. 2013;4(3):384S-92S.
 Steinmetz KA, Potter JD. Vegetables, fruit, and cancer prevention: a review. J Am Diet Assoc. 1996;96(10):1027-39.
 Magkos F, Arvaniti F, Zampelas A. Organic food: buying more safety or just peace of mind? A critical review of the literature. Crit Rev Food Sci Nutr. 2006;46(1):23-56.
 Liu RH. Health benefits of fruit and vegetables are from additive and synergistic combinations of phytochemicals. Am J Clin Nutr. 2003;78(3 Suppl):517S-520S.
 Martin A, Cherubini A, Andres-lacueva C, Paniagua M, Joseph J. Effects of fruits and vegetables on levels of vitamins E and C in the brain and their association with cognitive performance. J Nutr Health Aging. 2002;6(6):392-404.
 Polidori MC, PraticÃ³ D, Mangialasche F, et al. High fruit and vegetable intake is positively correlated with antioxidant status and cognitive performance in healthy subjects. J Alzheimers Dis. 2009;17(4):921-7.
 Pandey KB, Rizvi SI. Plant polyphenols as dietary antioxidants in human health and disease. Oxid Med Cell Longev. 2009;2(5):270-8.
 Lawrence GD. Dietary fats and health: dietary recommendations in the context of scientific evidence. Adv Nutr. 2013;4(3):294-302.
 De roos N, Schouten E, Katan M. Consumption of a solid fat rich in lauric acid results in a more favorable serum lipid profile in healthy men and women than consumption of a solid fat rich in trans-fatty acids. J Nutr. 2001;131(2):242-5.
 Willett WC. Dietary fat plays a major role in obesity: no. Obes Rev. 2002;3(2):59-68.
 Brehm BJ, Dâalessio DA. Benefits of high-protein weight loss diets: enough evidence for practice?. Curr Opin Endocrinol Diabetes Obes. 2008;15(5):416-21.
 Paddon-jones D, Westman E, Mattes RD, Wolfe RR, Astrup A, Westerterp-plantenga M. Protein, weight management, and satiety. Am J Clin Nutr. 2008;87(5):1558S-1561S.
 Halton TL, Hu FB. The effects of high protein diets on thermogenesis, satiety and weight loss: a critical review. J Am Coll Nutr. 2004;23(5):373-85.
 Clabaugh K, Neuberger GB. Research evidence for reducing sugar sweetened beverages in children. Issues Compr Pediatr Nurs. 2011;34(3):119-30.
 Basu S, Lewis K. Reducing added sugars in the food supply through a cap-and-trade approach. Am J Public Health. 2014;104(12):2432-8.
 Available at: http://www.who.int/mediacentre/news/releases/2015/sugar-guideline/en/. Accessed May 5, 2015.
 Willett WC. The Mediterranean diet: science and practice. Public Health Nutr. 2006;9(1A):105-10.
 Scarmeas N, Stern Y, Tang MX, Mayeux R, Luchsinger JA. Mediterranean diet and risk for Alzheimerâs disease. Ann Neurol. 2006;59(6):912-21.
 Available at: http://www.drperlmutter.com/learn/studies/. Accessed May 5, 2015.
 Babio N, BullÃ³ M, Salas-salvadÃ³ J. Mediterranean diet and metabolic syndrome: the evidence. Public Health Nutr. 2009;12(9A):1607-17.
 Thomas SL, Hyde J, Karunaratne A, Kausman R, Komesaroff PA. âThey all work.when you stick to themâ: a qualitative investigation of dieting, weight loss, and physical exercise, in obese individuals. Nutr J. 2008;7:34.