Paleolithic diet
The Paleolithic diet, Paleo diet, caveman diet, or stone-age diet is a modern fad diet consisting of foods thought by its proponents to mirror those eaten during the Paleolithic era.[1]
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There are different variants of the diet; some are predominantly plant-based but the most recent popular variants focus on animal products.[2] The diet avoids processed food and typically includes vegetables, fruits, nuts, roots, and meat and excludes dairy products, grains, sugar, legumes, processed oils, salt, alcohol, and coffee.[3] The ideas behind the diet can be traced to primitive diets advocated in 19th century. In the 1970s Walter L. Voegtlin popularized a meat-centric "Stone Age" diet, and in the 21st century, the Paleo Diet was popularized in the best-selling books of Loren Cordain.[4] As of 2019 the paleo diet industry was worth approximately US$500 million.
In the 21st century, the sequencing of the human genome and DNA analysis of the remains of early humans has found evidence that humans evolved rapidly in response to changing diet. This evidence undermines a core premise of the paleolithic diet, that human digestion has remained essentially unchanged over time.[5] Anthropological science has found that the paleolithic human diet was more varied and less meat-centric than had been assumed.
The paleolithic diet is promoted as a way of improving health.[6] There is some evidence that following it may lead to improvements in body composition and metabolism compared with the typical Western diet[7] or compared with diets recommended by some European nutritional guidelines.[8] On the other hand, following the diet can lead to nutritional deficiencies such as an inadequate calcium intake, and side effects can include weakness, diarrhea, and headaches.[9]
History and terminology
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Adrienne Rose Johnson writes that the idea that the primitive diet was superior to current dietary habits dates back to the 1890s with such writers as Emmet Densmore and John Harvey Kellogg. Densmore proclaimed that "bread is the staff of death", while Kellogg supported a diet of starchy and grain-based foods in accord with "the ways and likings of our primitive ancestors".[10] Arnold DeVries advocated an early version of the Paleolithic diet in his 1952 book, Primitive Man and His Food.[11] In 1958, Richard Mackarness authored Eat Fat and Grow Slim, which proposed a low-carbohydrate "Stone Age" diet.[12]
In his 1975 book The Stone Age Diet, gastroenterologist Walter L. Voegtlin advocated a meat-based diet, with low proportions of vegetables and starchy foods, based on his declaration that humans were "exclusively flesh-eaters" until 10,000 years ago.[13]
In 1985 Stanley Boyd Eaton and Melvin Konner published a controversial article in the New England Journal of Medicine proposing that modern humans were biologically very similar their primitive ancestors and so "genetically programmed" to consume pre-agricultural foods. Eaton and Konner proposed a "discordance hypothesis" by which the mismatch between modern diet and human biology gave rise to lifestyle diseases, such as obesity and diabetes.[14]
The diet started to become popular in the 21st century, where it attracted a largely internet-based following using web sites, forums and social media.[15]
These diet's ideas were further popularized by Loren Cordain, a health scientist with a Ph.D. in physical education, who trademarked the words "The Paleo Diet" and who wrote a 2002 book of that title.[16]
In 2012 the paleolithic diet was described as being one of the "latest trends" in diets, based on the popularity of diet books about it;[17] in 2013 and 2014 the Paleolithic diet was Google's most searched weight-loss method.[18]
The paleolithic or paleo diet is also sometimes referred to as the caveman or stone-age diet.[19]
Foodstuffs
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The basis of the diet is a re-imagining of what paleolithic people ate, and different proponents recommend different diet compositions. Eaton and Konner, for example, wrote a 1988 book The Paleolithic Prescription with Marjorie Shostak, and it described a diet which is 65% plant-based. This is not typical of more recently devised paleo diets; Loren Cordain's – probably the most popular – instead emphasizes animal products and an avoidance of processed food.[20] Diet advocates concede the modern paleolithic diet cannot be a faithful recreation of what paleolithic people ate, and instead aim to "translate" that into a modern context, avoiding such likely historical practices as cannibalism.[21]
Foodstuffs that have been described as permissible include:
- "vegetables, fruits, nuts, roots, meat, and organ meats";[22]
- "vegetables (including root vegetables), fruit (including fruit oils, e.g., olive oil, coconut oil, and palm oil), nuts, fish, meat, and eggs, and it excluded dairy, grain-based foods, legumes, extra sugar, and nutritional products of industry (including refined fats and refined carbohydrates)";[23] and
- "avoids processed foods, and emphasizes eating vegetables, fruits, nuts and seeds, eggs, and lean meats".[24]
The diet forbids the consumption of all dairy products. This is because milking did not exist until animals were domesticated after the Paleolithic era.[25]
Ancestral diet
Adoption of the Paleolithic diet assumes that modern humans can reproduce the hunter-gatherer diet. Molecular biologist Marion Nestle argues that "knowledge of the relative proportions of animal and plant foods in the diets of early humans is circumstantial, incomplete, and debatable and that there are insufficient data to identify the composition of a genetically determined optimal diet. The evidence related to Paleolithic diets is best interpreted as supporting the idea that diets based largely on plant foods promote health and longevity, at least under conditions of food abundance and physical activity."[26] Ideas about Paleolithic diet and nutrition are at best hypothetical.[27]
The data for Cordain's book only came from six contemporary hunter-gatherer groups, mainly living in marginal habitats. One of the studies was on the !Kung, whose diet was recorded for a single month, and one was on the Inuit.[28] Due to these limitations, the book has been criticized as painting an incomplete picture of the diets of Paleolithic humans.[29] It has been noted that the rationale for the diet does not adequately account for the fact that, due to the pressures of artificial selection, most modern domesticated plants and animals differ drastically from their Paleolithic ancestors; likewise, their nutritional profiles are very different from their ancient counterparts. For example, wild almonds produce potentially fatal levels of cyanide, but this trait has been bred out of domesticated varieties using artificial selection. Many vegetables, such as broccoli, did not exist in the Paleolithic period; broccoli, cabbage, cauliflower, and kale are modern cultivars of the ancient species Brassica oleracea.[30]
Trying to devise an ideal diet by studying contemporary hunter-gatherers is difficult because of the great disparities that exist; for example, the animal-derived calorie percentage ranges from 25% for the Gwi people of southern Africa to 99% for the Alaskan Nunamiut. Descendants of populations with different diets have different genetic adaptations to those diets, such as the ability to digest sugars from starchy foods. Modern hunter-gatherers tend to exercise considerably more than modern office workers, protecting them from heart disease and diabetes, though highly processed modern foods also contribute to diabetes when those populations move into cities.[31]
A 2018 review of the diet of hunter-gatherer populations found that the dietary provisions of the palelothic diet had been based on questionable research, and were "difficult to reconcile with more detailed ethnographic and nutritional studies of hunter-gatherer diet".[32]
Researchers have proposed that cooked starches met the energy demands of an increasing brain size, based on variations in the copy number of genes encoding amylase.[33]
Health effects
The paleolithic diet is controversial in part because of the exaggerated health claims made for it by its supporters.[34] In general, research into the diet has been of poor quality.[35]
The aspects of the paleolithic diet that result in eating fewer processed foods and less sugar and salt are consistent with mainstream advice about diet.[36] Diets with a paleolithic nutrition pattern have some similarities to traditional ethnic diets such as the Mediterranean diet that have been found to be healthier than the Western diet.[37] Following the paleolithic diet, however, can lead to nutritional deficiencies such as those of vitamin D and calcium, which in turn could lead to compromised bone health;[38] it can also lead to an increased risk of ingesting toxins from high fish consumption.[39]
Research into the weight loss effects of the paleolithic diet has generally been of poor quality.[40] There is some evidence the diet helps achieve weight loss, possibly because of the increased satiety from the foods typically eaten.[41] One trial of obese postmenopausal women found improvements in weight and fat loss after six months, but the benefits had ceased by 24 months; side effects among participants included "weakness, diarrhea, and headaches". As with any other diet regime, the paleolithic diet leads to weight loss because of overall decreased caloric intake, rather than a special feature of the diet itself.[42]
There is no good evidence that following a paleolithic diet lessens the risk of cardiovascular disease or metabolic syndrome.[43] As of 2014 there was no evidence the paleolithic diet is effective in treating inflammatory bowel disease.[44]
The paleolithic diet similar to the Atkins diet encourages the consumption of large amounts of red meat, especially meats high in saturated fat. This has a negative effect on health in the long run as medical studies have shown that it can lead to increased incidence of cardiovascular disease.[45]
Genetics
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The stated rationale for the paleolithic diet is that human genes of modern times are unchanged from those of 10,000 years ago, and that the diet of that time is therefore the best fit with humans today.[46] Loren Cordain has described the paleo diet as "the one and only diet that ideally fits our genetic makeup".[47]
The argument is that modern humans have not been able to adapt to the new circumstances.[48] According to Cordain, before the agricultural revolution, hunter-gatherer diets rarely included grains, and obtaining milk from wild animals would have been "nearly impossible".[49] Advocates of the diet argue that the increase in diseases of affluence after the dawn of agriculture was caused by these changes in diet, but others have countered that it may be that pre-agricultural hunter-gatherers did not suffer from the diseases of affluence because they did not live long enough to develop them.[50]
According to the model from the evolutionary discordance hypothesis, "many chronic diseases and degenerative conditions evident in modern Western populations have arisen because of a mismatch between Stone Age genes and modern lifestyles."[51] Advocates of the modern paleo diet have formed their dietary recommendations based on this hypothesis. They argue that modern humans should follow a diet that is nutritionally closer to that of their Paleolithic ancestors.
The evolutionary discordance is incomplete, since it is based mainly on the genetic understanding of the human diet and a unique model of human ancestral diets, without taking into account the flexibility and variability of the human dietary behaviors over time.[52] Studies of a variety of populations around the world show that humans can live healthily with a wide variety of diets and that humans have evolved to be flexible eaters.[53] Lactose tolerance is an example of how some humans have adapted to the introduction of dairy into their diet. While the introduction of grains, dairy, and legumes during the Neolithic revolution may have had some adverse effects on modern humans, if humans had not been nutritionally adaptable, these technological developments would have been dropped.[54]
Since the publication of Eaton and Konner's paper in 1985, analysis of the DNA of primitive human remains has provided evidence that evolving humans were continually adapting to new diets, thus challenging the hypotheis underlying the paleothic diet.[55] Evolutionary biologist Marlene Zuk writes that the idea that our genetic makeup today matches that of our ancestors is misconceived, and that in debate Cordain was "taken aback" when told that 10,000 years was "plenty of time" for an evolutionary change in human digestive abilities to have taken place. On this basis Zuk dismisses Cordain's claim that the paleo diet is "the one and only diet that fits our genetic makeup".[56]
Paleoanthropologist Peter Ungar has written that the paleo diet is a "myth", on account both of its invocation of a single suitable diet when in reality humans have always been a "work in progress", and because diet has always been varied because humans were spread widely over the planet.[57]
Anthropological geneticist Anne C. Stone has said that humans have adapted in the last 10,000 years in response to radical changes in diet. In 2016 she was quoted as saying "It drives me crazy when Paleo-diet people say that we've stopped evolving — we haven't".[58]
Melvin Konner has said the challenge to the hypothesis is not greatly significant since the real challenges to human non-adaptation have occurred with the rise of ever-more refined foodstuffs in the last 300 years.[59]
Environmental impact
A 2019 analysis of diets in the United States ranked consumption of a paleolithic diet as more environmentally harmful than consumption of an omnivorous diet, though not so harmful as a ketogenic diet.[60]
Elizabeth Kolbert has written the paleolithic's emphasis on meat consumption is a "disaster" on account of meat's comparatively high energy production costs.[61]
Popularity
A lifestyle and ideology have developed around the diet.[62] "Paleolithic" products include clothing, smartphone apps, and cookware. Many paleolithic cookery books have been bestsellers.[63]
As of 2019 the market for products with the word "Paleo" in their name was worth approximately $US500 million, with strong growth prospects despite pushback from the scientific community. Some products were taking advantage of the trend by touting themselves as "paleo-approved" despite having no apparent link to the movement's tenets.[64]
Like many other diets, the paleolithic diet is promoted by some by an appeal to nature and a narrative of conspiracy theories about how nutritional research, which does not support the supposed benefits of the paleolithic diet, is controlled by a malign food industry.[65] Paleolithic diet advocate John Durant has blamed suppression of the truth about diet in the United States on "the vegetarian lobby".[66]
Politically, the paleolithic diet has found favour with the alt-right as a point of opposition to what is seen as more left-wing veganism.[67]
See also
- List of historical cuisines
- List of diets
- Low carbohydrate diet
- Low-glycemic diet
- Modern primitive
- Nutritional genomics
- Paleoconservatism
- Paleo Foundation
- Peganism
- Raw foodism
Evolutionary biology portal
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Citations
- de Menezes et al. 2019: "The Paleolithic diet has been gaining ground in the field of fad diets. It is based on food patterns of human Paleolithic ancestors, about 2.6 million to 10,000 years ago, a period that precedes the advent of industrial agriculture and is different from today’s modern society".
- Chang & Nowell 2014 .
- British Dietetic Association 2014.
- Ask EN 2010; Johnson 2015; Fitzgerald 2014.
- Whoriskey 2016; Zuk 2013, p. 133: "No one [...] can legitimately claim to have found the only 'natural' diet for humans. We simply ate too many different foods in the past, and have adapted to new ones".
- NHS 2008.
- Katz & Meller 2014.
- Manheimer et al. 2015.
- For calcium deficicency see Tarantino, Citro & Finelli 2015; for other risks see Obert et al. 2017.
- Johnson 2015.
- Newton 2019, p. 102.
- Hill 1996; Smith 2015, p. 117: "Mackarness, who founded the first British National Health Service clinical ecology clinic in Basingstoke, pioneered the so-called Stone Age Diet, in the belief that humans had not evolved to consume foods, including wheat and milk, developed since Paleolithic times (in fact, today's weight-reduction version of Mackarness's Stone Age diet is called the 'Paleo diet')."
- Zuk 2013, pp. 111–112.
- Johnson 2015.
- Chang & Nowell 2016.
- Ask EN 2010. For Cordain's qualifications see Chang & Nowell 2016. For trademarking see Lowe 2014.
- Cunningham 2012.
- Chang & Nowell 2016.
- Shariatmadari 2014.
- Chang & Nowell 2016.
- Kolbert 2014.
- Tarantino, Citro & Finelli 2015.
- Manheimer et al. 2015.
- Katz & Meller 2014.
- Longe 2008, p. 180: "No dairy products are allowed while on this diet. This means no milk, cheese, butter, or anything else that comes from milking animals. This is because milking did not occur until animals were domesticated, sometime after the Paleolithic age. Eggs are allowed however, because Paleolithic man would probably have found eggs in bird's nests during foraging and hunting."
- Nestle 2000.
- Milton 2002.
- Ungar & Teaford 2002; Lee 1969; Eaton, Shostak & Konner 1988.
- Ungar & Teaford 2002.
- Jabr 2013.
- Gibbons 2014.
- Pontzer, Wood & Riachlen 2018 .
- Zimmer 2015; Hardy et al. 2015 .
- Pitt 2016; Kolbert 2014 : "[...] proponents of the paleo diet make all sorts of claims for its efficacy. Some contend that it cures autoimmune diseases, others that it reverses diabetes."
- Pitt 2016; Obert et al. 2017.
- British Dietetic Association 2014.
- Tarantino, Citro & Finelli 2015; Katz & Meller 2014.
- British Dietetic Association 2014; Pitt 2016.
- Tarantino, Citro & Finelli 2015.
- Obert et al. 2017.
- de Menezes et al. 2019.
- Obert et al. 2017.
- Ghaedi et al. 2019; Manheimer et al. 2015.
- Hou, Lee & Lewis 2014: "Even less evidence exists for the efficacy of the SCD, FODMAP, or Paleo diets. Furthermore, the practicality of maintaining these interventions over long periods of time is doubtful."
- Longe 2008, p. 182.
- Obert et al. 2017.
- Gibbons 2014.
- Carrera-Bastos et al. 2011.
- Cordain et al. 2005
- Ungar, Grine & Teaford 2006.
- Elton 2008, p. 9.
- Turner & Thompson 2013.
- Leonard 2002.
- Jabr 2013.
- Whoriskey 2016.
- Zuk 2013, p. 114.
- Ungar 2017.
- Whoriskey 2016.
- Whoriskey 2016.
- O'Malley et al. 2019.
- Kolbert 2014.
- Goldstein 2010; Wilson 2015.
- Chang & Nowell 2016.
- Decker 2019.
- NHS 2008; Kolbert 2014; Hall 2014: "Fad diets and 'miracle' diet supplements promise to help us lose weight effortlessly. Different diet gurus offer a bewildering array of diets that promise to keep us healthy and make us live longer: vegan, Paleo, Mediterranean, low fat, low carb, raw food, gluten-free [...] the list goes on."
- Kolbert 2014.
- Gander 2017.
References
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- "Top 5 Worst Celebrity Diets to Avoid in 2015". British Dietetic Association. 8 December 2014.
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- Chang ML, Nowell A (September 2016). "How to make stone soup: Is the "Paleo diet" a missed opportunity for anthropologists?". Evol. Anthropol. 25 (5): 228–231. doi:10.1002/evan.21504. PMID 27753214. S2CID 12918685.
- Cordain, Loren; Eaton, S. Boyd; Sebastian, Anthony; Mann, Neil; Lindeberg, Staffan; Watkins, Bruce A.; O’Keefe, James H.; Brand-Miller, Janette (2005). "Origins and evolution of the Western diet: health implications for the 21st century". The American Journal of Clinical Nutrition. 81 (2): 341–354. doi:10.1093/ajcn.81.2.341. ISSN 0002-9165. PMID 15699220.
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- Eaton SB, Shostak M, Konner M (1988). The Paleolithic Prescription: A Program of Diet and Exercise and a Design for Living. Harper and Row. p. 79. ISBN 978-0060916350.
- Elton S (2008). "Environments, Adaptation, and Evolutionary Medicine: Should We be Eating a Stone Age Diet?". In Elton S, O'Higgins P (eds.). Medicine and Evolution: Current Applications, Future Prospects. Boca Raton, FL: CRC Press. ISBN 978-1-4200-5134-6.
- Fitzgerald M (2014). Diet Cults: The Surprising Fallacy at the Core of Nutrition Fads and a Guide to Healthy Eating for the Rest of Us. Pegasus Books. ISBN 978-1-60598-595-4.
- Gander K (21 December 2017). "From milk to pizza, these are the foods that fascists ruined in 2017". International Business Times.
- Ghaedi E, Mohammadi M, Mohammadi H, Ramezani-Jolfaie N, Malekzadeh J, Hosseinzadeh M, Salehi-Abargouei A (July 2019). "Effects of a Paleolithic Diet on Cardiovascular Disease Risk Factors: A Systematic Review and Meta-Analysis of Randomized Controlled Trials". Adv Nutr. 10 (4): 634–646. doi:10.1093/advances/nmz007. PMC 6628854. PMID 31041449.
- Gibbons A (September 2014). "The Evolution of Diet". National Geographic Magazine.
- Goldstein J (8 January 2010). "The New Age Cavemen and the City". The New York Times.
- Hall H (2014). "Food myths: what science knows (and does not know) about diet and nutrition". Skeptic. 19 (4). p. 10.
- Hardy K, Brand-Miller J, Brown KD, Thomas MG, Copeland L (September 2015). "The Imporance of Dietary Carbohydrate in Human Evolution". Q Rev Biol. 90 (3): 251–68. doi:10.1086/682587. PMID 26591850. S2CID 28309169.
- Hill R (1996). "Obituary: Dr Richard Mackarness". The Independent.
- Henry AG, Brooks AS, Piperno DR (April 2014). "Plant foods and the dietary ecology of Neanderthals and early modern humans". J. Hum. Evol. 69: 44–54. doi:10.1016/j.jhevol.2013.12.014. PMID 24612646.
- Hou JK, Lee D, Lewis J (October 2014). "Diet and inflammatory bowel disease: review of patient-targeted recommendations". Clinical Gastroenterology and Hepatology (Review). 12 (10): 1592–600. doi:10.1016/j.cgh.2013.09.063. PMC 4021001. PMID 24107394.
Even less evidence exists for the efficacy of the SCD, FODMAP, or Paleo diets. Furthermore, the practicality of maintaining these interventions over long periods of time is doubtful.
- Jabr F (3 June 2013). "How to Really Eat Like a Hunter-Gatherer: Why the Paleo Diet Is Half-Baked". Scientific American.
- Johnson AR (2015). "The Paleo Diet and the American Weight Loss Utopia, 1975–2014". Utopian Studies. Penn State University Press. 26 (1): 101–124. doi:10.5325/utopianstudies.26.1.0101. S2CID 144735157.
- Katz DL, Meller S (2014). "Can we say what diet is best for health?". Annual Review of Public Health. 35: 83–103. doi:10.1146/annurev-publhealth-032013-182351. PMID 24641555.
- Kolbert E (20 July 2014). "Stone Soup—How the Paleolithic life style got trendy". The New Yorker.
- Konner M, Eaton S (2010). "Paleolithic Nutrition: Twenty-Five Years Later". Nutrition in Clinical Practice. 25 (6): 594–602. doi:10.1177/0884533610385702. PMID 21139123.
- Lee R (1969). "Kung Bushmen Subsistence: An Input-Output Analysis". Contributions to Anthropology: Ecological Essays. Ottawa: National Museums of Canada (230): 73–94.
- Leonard WR (1 December 2002). "Food for Thought: Dietary change was a driving force in human evolution". Scientific American. 287 (6): 106–15. doi:10.1038/scientificamerican1202-106. PMID 12469653. Retrieved 20 January 2016.
- Longe JL (2008). The Gale Encyclopedia of Diets: A Guide to Health and Nutrition. The Gale Group. ISBN 978-1-4144-2991-5.
- Lowe K (20 July 2014). "A dissenting view on the Paleo Diet". The Seattle Times. Retrieved 17 March 2015.
- Manheimer EW, van Zuuren EJ, Fedorowicz Z, Pijl H (October 2015). "Paleolithic nutrition for metabolic syndrome: systematic review and meta-analysis". Am. J. Clin. Nutr. 102 (4): 922–32. doi:10.3945/ajcn.115.113613. PMC 4588744. PMID 26269362.
- Milton K (2002). "Hunter-gatherer diets: wild foods signal relief from diseases of affluence (PDF)" (PDF). In Ungar, Peter S., Teaford, Mark F. (eds.). Human Diet: Its Origins and Evolution. Westport, CT: Bergin and Garvey. pp. 111–22. ISBN 978-0-89789-736-5.
- Nestle M (March 2000). "Paleolithic diets: a sceptical view". Nutrition Bulletin. 25 (1): 43–7. doi:10.1046/j.1467-3010.2000.00019.x.
- Newton DE (2019). Vegetarianism and Veganism: A Reference Handbook. ABC-CLIO. ISBN 978-1-4408-6763-7.
- "Caveman fad diet". Choices. NHS. 9 May 2008. Retrieved 25 December 2015.
- Obert J, Pearlman M, Obert L, Chapin S (2017). "Popular Weight Loss Strategies: a Review of Four Weight Loss Techniques". Current Gastroenterology Reports (Review). 19 (12): 61. doi:10.1007/s11894-017-0603-8. PMID 29124370. S2CID 45802390.
- O'Malley K, Willits-Smith A, Aranda R, Heller M, Rose D (2019). "Vegan vs Paleo: Carbon Footprints and Diet Quality of 5 Popular Eating Patterns as Reported by US Consumers". Current Developments in Nutrition. 1 (Supplement 1). doi:10.1093/cdn/nzz047.P03-007-19.
- Osborne DL, Hames R (2014). "A life history perspective on skin cancer and the evolution of skin pigmentation". American Journal of Physical Anthropology. 153 (1): 1–8. doi:10.1002/ajpa.22408. ISSN 0002-9483. PMID 24459698.
- Pitt CE (2016). "Cutting through the Paleo hype: The evidence for the Palaeolithic diet". Aust Fam Physician. 45 (1): 35–8. PMID 27051985.
- Pontzer H, Wood BM, Raichlen DA (1 December 2018). "Hunter-gatherers as models in public health" (PDF). Obesity Reviews. 19 Suppl 1: 24–35. doi:10.1111/obr.12785. ISSN 1467-789X. PMID 30511505. S2CID 54489120.
- Ramsden C, Faurot K, Carrera-Bastos P, Cordain L, De Lorgeril M, Sperling L (2009). "Dietary Fat Quality and Coronary Heart Disease Prevention: A Unified Theory Based on Evolutionary, Historical, Global, and Modern Perspectives". Current Treatment Options in Cardiovascular Medicine. 11 (4): 289–301. doi:10.1007/s11936-009-0030-8. PMID 19627662. S2CID 1058038.
- Shariatmadari D (22 October 2014). "What language tells us about the roots of the stone age diet". The Guardian. Retrieved 17 March 2015.
- Smith M (2015). Another Person's Poison: A History of Food Allergy. Columbia University Press. ISBN 978-0-231-16484-9.
- Tarantino G, Citro V, Finelli C (September 2015). "Hype or Reality: Should Patients with Metabolic Syndrome-related NAFLD be on the Hunter-Gatherer (Paleo) Diet to Decrease Morbidity?". J Gastrointestin Liver Dis (Review). 24 (3): 359–68. doi:10.15403/jgld.2014.1121.243.gta. PMID 26405708.
- Turner, BL; Thompson, AL (2013). "Beyond the Paleolithic prescription: incorporating diversity and flexibility in the study of human diet evolution". Nutrition Reviews (Review). 71 (8): 501–10. doi:10.1111/nure.12039. PMC 4091895. PMID 23865796.
- Ungar PS, Grine FE, Teaford MF (2006). "Diet in Early Homo: A Review of the Evidence and a New Model of Adaptive Versatility". Annual Review of Anthropology. 35 (1): 209–228. doi:10.1146/annurev.anthro.35.081705.123153. ISSN 0084-6570.
- Ungar PS, Teaford MF (1 January 2002). Human Diet: Its Origin and Evolution. Greenwood Publishing Group. pp. 67–. ISBN 978-0-89789-736-5.
- Ungar PS (17 April 2017). "The 'True' Human Diet". Scientific American.
- Whoriskey P (7 March 2016). "Paleo-diet debates evolve into something bigger". Washington Post.
- Wilson J (16 March 2015). "Paleo isn't a fad diet, it's an ideology that selectively denies the modern world". The Guardian. Retrieved 5 February 2016.
- Zimmer C (13 August 2015). "For Evolving Brains, a 'Paleo' Diet Full of Carbs". The New York Times. Retrieved 14 August 2015.
- Zuk M (2013). Paleofantasy: What Evolution Really Tells Us about Sex, Diet, and How We Live. W.W. Norton & Co. ISBN 978-0-393-08137-4.
Further reading
- Bijlefeld M, Zoumbaris SK (2014). "Paleo Diet". Encyclopedia of Diet Fads: Understanding Science and Society (2nd ed.). ABC-CLIO. pp. 164–166. ISBN 978-1-61069-760-6.
- Gorski D (18 March 2013). "It's a part of my paleo fantasy, it's a part of my paleo dream". Science-Based Medicine. Retrieved 1 February 2015.
External links
- Human Timeline (Interactive) – Smithsonian, National Museum of Natural History (August 2016).