What Was the True "Paleo Diet"?/info

Introduction

The modern "Paleo diet" movement — which prescribes a dietary regimen of lean meats, fish, vegetables, fruits, and nuts while excluding grains, dairy, and processed foods — claims inspiration from the eating patterns of Palaeolithic hunter-gatherers. The foundational premise is that human physiology is optimally adapted to the diet consumed during the approximately 2.5-million-year span of the Palaeolithic, and that the mismatch between this ancestral diet and modern industrial foods explains much of contemporary metabolic disease. While this premise contains a kernel of evolutionary logic, the actual diets of Palaeolithic humans were far more varied, regionally specific, and seasonally constrained than the modern dietary movement acknowledges.

Recent advances in biomolecular archaeology — particularly the analysis of ancient dental calculus, coprolites (preserved faeces), stable isotopes, and dental microwear — have revealed that ancient human diets were remarkably diverse and were shaped by local ecology, latitude, altitude, and season. Hunter-gatherers in tropical environments consumed diets rich in tubers, fruits, and invertebrates; those in coastal and riverine settings relied heavily on aquatic resources; those in sub-Arctic environments ate predominantly animal foods. There was no single "Paleo diet" — there were hundreds, each adapted to a specific ecological niche.

The implications of this diversity extend beyond nutrition. The transition from hunting and gathering to agriculture — the Neolithic revolution — produced dramatic changes in human oral microbiomes, dental pathology, and metabolic health, as documented in ancient dental calculus. Understanding the full range of pre-agricultural diets, and the ecological constraints that shaped them, provides essential context for evaluating modern dietary prescriptions that claim ancestral authority.

What we know

The most direct evidence for ancient diets comes from dental calculus — the mineralised plaque that forms on teeth during life and is preserved after death. Calculus traps microfossils (starch grains, phytoliths), DNA (from consumed organisms and from the oral microbiome), and proteins. Henry et al. (2011) demonstrated that Neanderthal dental calculus from Shanidar Cave, Iraq, and Spy Cave, Belgium, contained starch grains from grasses and date palms, as well as evidence of cooked plant material. This finding overturned the long-standing assumption that Neanderthals were primarily meat eaters and established dental calculus as a revolutionary tool for dietary reconstruction.

Weyrich et al. (2017) expanded this approach by shotgun-sequencing DNA from Neanderthal dental calculus from El Sidrón, Spain, and Spy Cave, Belgium. They found striking regional differences: the Spy Neanderthals consumed woolly rhinoceros and wild sheep (consistent with a meat-heavy steppe diet), while the El Sidrón Neanderthals consumed mushrooms, pine nuts, and forest moss, with no detectable animal DNA. The El Sidrón individuals also carried DNA from the plant pathogen Enterocytozoon bieneusi and from poplar bark, which contains salicylic acid (the active ingredient in aspirin), suggesting possible self-medication.

Adler et al. (2013) sequenced ancient dental calculus from 34 European skeletons spanning the Mesolithic, Neolithic, and post-Industrial periods and showed that the transition to farming was associated with a fundamental shift in the oral microbiome. Hunter-gatherer calculus was dominated by bacteria associated with low-carbohydrate diets and periodontal health; Neolithic farmer calculus showed an increase in cariogenic (cavity-causing) bacteria, consistent with the higher starch content of agricultural diets. A second major shift occurred with the Industrial Revolution, as processed sugar and flour further altered the microbial community.

Stable isotope analysis provides complementary evidence at a coarser resolution. Carbon and nitrogen isotope ratios in bone collagen reflect the trophic level and broad dietary category (terrestrial versus marine, C3 versus C4 plants) of the individual over the last years of life. Richards and Trinkaus (2009) analysed isotope data from Upper Palaeolithic modern humans and Neanderthals across Europe and found that both groups had isotopic signatures indicating high trophic-level diets — consistent with substantial meat consumption — but with variation between individuals and sites.

Pontzer and Wood (2021) synthesised dietary data from extant hunter-gatherer and other small-scale societies to characterise the range of human diets outside the industrial food system. They found that hunter-gatherer diets varied enormously by latitude: tropical foragers derived 30–40% of calories from animal sources and the rest from gathered plant foods; Arctic and sub-Arctic foragers derived 60–95% of calories from animal sources. Across all groups, diets were high in fibre, micronutrients, and dietary variety compared to modern industrial diets, but the macronutrient ratios were not fixed — they were determined by what the local environment provided.

Coprolite analysis provides the most direct evidence for individual meals. Reinhard and colleagues have analysed coprolites from sites across the Americas, revealing diets that included cactus pads, mesquite pods, agave, insects, small mammals, and fish, varying by region and season. In Europe, coprolite evidence is rarer due to preservation conditions, but the handful of analysed specimens confirm a mixed diet with substantial plant components.

Dental microwear analysis — the study of microscopic scratches and pits on tooth surfaces — distinguishes between diets that were abrasive (high in grit and plant fibre) and those that were less mechanically demanding. Fiorenza et al. (2011) applied this technique to Neanderthal molars from across Europe and found eco-geographic variation: Neanderthals from Mediterranean and steppe environments showed microwear patterns similar to those of ethnographic mixed-diet populations, while those from northern European environments showed patterns more consistent with meat-heavy diets. This confirmed that Neanderthal diet varied with ecology, not with biology.

Hardy et al. (2015) argued on the basis of plant microfossil and biochemical evidence that starch-rich plant foods — particularly underground storage organs (tubers, corms, rhizomes) — were a critical component of hominin diets from at least 120,000 years before the present onward. They proposed that the co-evolution of salivary amylase gene copy number (AMY1) with starch consumption indicates a long evolutionary history of starch reliance, predating agriculture by tens of thousands of years.

Classification of theories

A. Plausible explanations (supported by evidence, not refuted):

1. Diet was determined by local ecology, not by species identity: The most robust finding across all lines of evidence — dental calculus, isotopes, microwear, coprolites — is that ancient human diets were shaped by what was available in the local environment. There was no universal "Paleo diet"; diet was a function of latitude, season, coastal proximity, altitude, and local plant and animal communities.

1. Plant foods were a consistent and often dominant component of non-Arctic diets: The earlier assumption that Palaeolithic humans were primarily meat eaters has been overturned by dental calculus and microwear evidence. In tropical and temperate environments, gathered plant foods (tubers, fruits, seeds, nuts) provided a substantial or majority share of calories.

1. The Neolithic transition fundamentally altered human nutrition and oral health: The shift to agriculture increased caloric reliability but reduced dietary diversity, increased cariogenic starch consumption, and altered the oral microbiome in ways that promoted dental disease. This transition is well documented in the dental calculus record.

B. Possible explanations (raised by researchers, less well supported):

1. Aquatic resources as a driver of human brain evolution: The "aquatic foods" hypothesis proposes that omega-3 fatty acids from fish and shellfish were essential for the evolution of large human brains. Supported by coastal and riverine site evidence but difficult to test directly, since aquatic resource use is hard to quantify in the deep Palaeolithic.

1. Starch consumption and AMY1 copy number co-evolution as evidence for pre-agricultural carbohydrate dependence: Hardy et al. (2015) argue that high AMY1 copy number in modern humans reflects selection for efficient starch digestion long before agriculture. Plausible but debated; the timing of AMY1 expansion is uncertain, and some populations with high starch diets have not undergone the expected AMY1 expansion.

C. Highly unlikely but argued by some:

1. The "Paleo diet" as a faithful representation of ancestral eating: The commercial Paleo diet prescribes a narrow range of foods (lean meats, vegetables, fruits, nuts) that does not reflect the ecological diversity of actual Palaeolithic diets. Ancient humans ate insects, tubers, organ meats, marrow, aquatic invertebrates, and many plant species that are absent from modern Paleo diet prescriptions. The exclusion of legumes and grains is also historically inaccurate; both were consumed by some pre-agricultural populations.

1. Neanderthals as obligate carnivores: Definitively refuted by dental calculus evidence (Henry et al., 2011; Weyrich et al., 2017) showing plant consumption across multiple Neanderthal populations.

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Research Papers

Landmark Studies

1. Henry, A. G., Brooks, A. S. & Piperno, D. R. (2011). "Microfossils in calculus demonstrate consumption of plants and cooked foods in Neanderthal diets (Shanidar III, Iraq; Spy I and II, Belgium)." Proceedings of the National Academy of Sciences, 108(2), 486–491. Full text: https://www.pnas.org/doi/10.1073/pnas.1016868108 [open access]

[Publisher abstract] Some scenarios have focused on the apparent lack of plant foods in Neanderthal diets. Here we report direct evidence for Neanderthal consumption of a variety of plant foods, in the form of phytoliths and starch grains recovered from dental calculus of Neanderthal skeletons from Shanidar Cave, Iraq, and Spy Cave, Belgium.

Full-text notes: Henry et al. recovered starch grains from at least seven plant taxa in Neanderthal dental calculus, including grasses, legumes, and date palms. Many starch grains showed morphological changes consistent with cooking (gelatinisation), providing evidence that Neanderthals processed plant foods thermally. The Shanidar specimens, from the Zagros Mountains of Iraq, yielded starch from grass seeds and date palms — the same plant types that later became staples of Near Eastern agriculture.

This study was transformative for two reasons: it provided the first direct, positive evidence for plant consumption by Neanderthals (previous evidence had been limited to the absence of plant remains, which is not informative), and it demonstrated the extraordinary preservation potential of dental calculus as a dietary archive. All subsequent dental calculus work in palaeoanthropology builds on the methods established here.

2. Weyrich, L. S. et al. (2017). "Neanderthal behaviour, diet, and disease inferred from ancient DNA in dental calculus." Nature, 544(7650), 357–361. Full text: https://www.nature.com/articles/nature21674 [publisher paywall]

[Publisher abstract] Recent genomic data have revealed multiple interactions between Neanderthals and modern humans, but there is currently little genetic evidence regarding Neanderthal behaviour, diet, or disease. Here we describe the shotgun-sequencing of ancient DNA from five specimens of Neanderthal calcified dental plaque (calculus) and the characterization of regional differences in Neanderthal ecology.

Full-text notes: Weyrich et al. applied metagenomic sequencing to Neanderthal dental calculus, recovering DNA from consumed organisms and from the oral microbiome. The regional contrast was stark: Spy Cave (Belgium) Neanderthals yielded DNA from woolly rhinoceros (Coelodonta antiquitatis) and wild sheep (Ovis), while El Sidrón (Spain) Neanderthals yielded only plant DNA — mushrooms (Coprinopsis), pine nuts (Pinus), and moss (Physcomitrella). No animal DNA was detected in the El Sidrón samples.

The study also recovered the oldest known draft genome of a microbial pathogen (Methanobrevibacter oralis) and identified DNA from poplar bark (Populus), which contains salicylic acid, in an El Sidrón individual who also had evidence of a dental abscess. The authors suggested this represented self-medication, though this interpretation has been debated.

3. Adler, C. J. et al. (2013). "Sequencing ancient calcified dental plaque shows changes in oral microbiota with dietary shifts of the Neolithic and Industrial revolutions." Nature Genetics, 45(4), 450–455. Full text: https://www.nature.com/articles/ng.2536 [publisher paywall]

[Publisher abstract] Here, we show that calcified dental plaque (dental calculus) on ancient teeth preserves a detailed genetic record throughout this period. Data from 34 early European skeletons indicate that the transition from hunter-gatherer to farming shifted the oral microbial community to a disease-associated configuration that has become more pronounced over time.

Full-text notes: Adler et al. provided the first diachronic study of the human oral microbiome, spanning the Mesolithic through the present. The key finding was that the oral microbial community became less diverse and more cariogenic (cavity-promoting) with the adoption of agriculture, and then shifted again with the Industrial Revolution as refined carbohydrates became prevalent. The Mesolithic hunter-gatherer microbiome was dominated by Tannerella and other bacteria associated with periodontal health; the Neolithic transition saw an increase in Streptococcus mutans and other cariogenic species.

This paper established that diet — specifically carbohydrate type and quantity — is a primary driver of oral microbiome composition, and that the transition to agriculture was a turning point in human oral health. The findings have been replicated and extended by subsequent studies using larger sample sizes and higher-resolution sequencing.

4. Pontzer, H. & Wood, B. M. (2021). "Effects of Evolution, Ecology, and Economy on Human Diet: Insights from Hunter-Gatherers and Other Small-Scale Societies." Annual Review of Nutrition, 41, 363–385. Full text: https://doi.org/10.1146/annurev-nutr-111120-105520 [publisher paywall]

[Agent-generated summary] A comprehensive review of dietary variation among extant hunter-gatherer and small-scale farming societies, synthesising quantitative data on macronutrient intake, caloric sources, and dietary diversity. The authors demonstrate that hunter-gatherer diets vary systematically with latitude and ecology, and that no single macronutrient ratio characterises the "ancestral" human diet.

Full-text notes: Pontzer and Wood compiled quantitative dietary data from the Hadza (Tanzania), Tsimane (Bolivia), !Kung (Botswana/Namibia), Inuit (Arctic), and other groups, showing that the proportion of calories from animal versus plant sources ranges from ~30% (tropical foragers) to ~95% (Arctic foragers). All groups consume high levels of dietary fibre (80–150 g/day, compared to ~15 g/day in Western diets) and high dietary diversity (dozens to hundreds of species per year).

The paper argues that the modern "Paleo diet" movement oversimplifies ancestral eating by prescribing a single macronutrient ratio and by excluding foods (legumes, certain tubers, grains) that were in fact consumed by many pre-agricultural populations. The most consistent features of hunter-gatherer diets — high fibre, high micronutrient density, and low processed-food content — are better targets for dietary recommendations than specific macronutrient ratios.

5. Fiorenza, L. et al. (2011). "Molar Macrowear Reveals Neanderthal Eco-Geographic Dietary Variation." PLoS ONE, 6(3), e14769. Full text: https://pmc.ncbi.nlm.nih.gov/articles/PMC3060801/ [open access]

[Publisher abstract] In this study, we analyze the maxillary molar macrowear of Neanderthals and early Homo sapiens, applying the occlusal fingerprint analysis method (OFA) to explore the relationship between eco-geographic variation and dietary mode.

Full-text notes: Fiorenza et al. used three-dimensional occlusal fingerprint analysis to quantify tooth-wear patterns in Neanderthals from Mediterranean, steppe, and northern European environments. They found that wear patterns varied systematically with ecology: Mediterranean Neanderthals showed mixed-diet patterns comparable to ethnographic omnivores; steppe Neanderthals showed patterns consistent with harder or more abrasive diets; and northern European Neanderthals showed patterns closer to those of ethnographic meat-focused groups.

The significance of the study is that it demonstrates dietary flexibility within a single hominin species, driven by environment rather than by biology. Neanderthals were not "carnivores" by nature; they ate what was available. This conclusion aligns with the dental calculus evidence and provides an independent line of support.

6. Hardy, K. et al. (2015). "The Importance of Dietary Carbohydrate in Human Evolution." Quarterly Review of Biology, 90(3), 251–268. Full text: https://doi.org/10.1086/682587 [publisher paywall]

[Agent-generated summary] Hardy and colleagues argue that starch-rich plant foods — particularly underground storage organs (tubers, corms) — were a critical and underappreciated component of hominin diets from at least 120,000 years before the present. They link the expansion of salivary amylase gene copy number (AMY1) to increasing reliance on starchy foods, proposing that this co-evolutionary relationship predates agriculture.

Full-text notes: This review synthesises evidence from dental calculus, plant microfossil analysis, and comparative genomics to argue that the "Man the Hunter" paradigm has led to a systematic underestimation of plant foods in Palaeolithic diets. Hardy et al. note that underground storage organs — tubers, corms, bulbs, and rhizomes — are calorie-dense, widely available across environments, and accessible year-round (unlike fruits and seeds, which are seasonal). The expansion of AMY1 copy number, which increases salivary amylase production and improves starch digestion, provides genetic evidence for the importance of starch in human evolutionary history.

The paper argues that the co-occurrence of cooking (which gelatinises starch and makes it more digestible) and AMY1 expansion suggests a feedback loop: cooking made starchy foods more nutritionally accessible, which selected for more efficient starch digestion, which in turn increased the dietary value of cooked tubers. This model connects fire control, diet, and genetic change in a coherent evolutionary framework.

Recent Studies

7. Cristiani, E. et al. (2022). "Genomic ancestry, diet and microbiomes of Upper Palaeolithic hunter-gatherers from San Teodoro cave." Communications Biology, 5, 1262. Full text: https://www.nature.com/articles/s42003-022-04190-2 [open access]

[Publisher abstract] Here we present a multi-omics study, integrating metagenomic and proteomic analyses of dental calculus, and human ancient DNA analysis of the petrous bones of two post-Last Glacial Maximum (LGM) individuals from San Teodoro cave (Italy), to reconstruct their lifestyle and the post-LGM resettlement of Europe.

Full-text notes: Cristiani et al. combined ancient human genomics with dental calculus proteomics and metagenomics to reconstruct the diet and health of two Upper Palaeolithic individuals from Sicily (~14,000 years before the present). The calculus contained proteins from deer and other ungulates, confirming terrestrial hunting, alongside plant microfossils indicating consumption of wild grasses and tubers. The oral microbiome was distinct from both modern and Neolithic profiles, representing a pre-agricultural baseline.

This multi-omics approach — integrating genomic, proteomic, and metagenomic data from a single individual — represents the methodological frontier for ancient diet reconstruction.

8. Fellows Yates, J. A. et al. (2022). "Ancient oral microbiomes support gradual Neolithic dietary shifts towards agriculture." Nature Communications, 13, 6927. Full text: https://www.nature.com/articles/s41467-022-34416-0 [open access]

[Publisher abstract] Here, the authors compare 76 dental calculus oral microbiomes from Palaeolithic hunter-gatherers with Neolithic and Copper Age farmers living in the same region of Italy. Integrating these data with archaeological data and dietary information, they trace changes in oral microbiota through the agricultural transition.

Full-text notes: Fellows Yates et al. analysed the largest set of ancient dental calculus microbiomes to date — 76 individuals from the same geographic region (Italy) spanning the Palaeolithic to the Copper Age. They found that the shift in oral microbiome composition was gradual rather than abrupt, suggesting that the dietary transition from foraging to farming was not a sudden revolution but a prolonged process of dietary change. Hunter-gatherer microbiomes showed higher diversity and lower frequencies of cariogenic species; farming microbiomes showed the opposite pattern, with the shift intensifying through the Neolithic and Copper Age.

The study's regional focus — comparing populations from the same environment at different time periods — controls for ecological confounds and provides a cleaner test of the dietary-transition hypothesis than cross-regional studies.

9. Crittenden, A. N. & Schnorr, S. L. (2017). "Current views on hunter-gatherer nutrition and the evolution of the human diet." American Journal of Physical Anthropology, 162(S63), 84–109. Full text: https://onlinelibrary.wiley.com/doi/full/10.1002/ajpa.23148 [publisher paywall]

[Agent-generated summary] A comprehensive review of dietary data from extant hunter-gatherer populations, emphasising the diversity of foraging strategies, the importance of plant foods and honey, and the limitations of using ethnographic data to infer Palaeolithic diets.

Full-text notes: Crittenden and Schnorr provide a corrective to the tendency to generalise from a few well-studied groups (especially the Hadza and the !Kung) to all hunter-gatherers. They note that honey, which is calorically dense and widely consumed by tropical foragers, is entirely absent from the modern Paleo diet despite being one of the most sought-after foods in ethnographic accounts. They also emphasise the role of food processing — grinding, soaking, fermenting, cooking — in making otherwise indigestible plant foods nutritionally available, and argue that processing is an essential and ancient component of the human dietary niche.

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Current Discussions

1. "Paleolithic Diet" — StatPearls / NCBI Bookshelf (2025)

https://www.ncbi.nlm.nih.gov/books/NBK482457/ A clinical reference reviewing the health claims of the modern Paleo diet against the evidence from evolutionary nutrition, dental calculus studies, and clinical trials.

1. "Ancient oral microbiomes support gradual Neolithic dietary shifts" — Nature Communications (2022)

https://www.nature.com/articles/s41467-022-34416-0 The Fellows Yates et al. study, providing the largest ancient dental calculus microbiome dataset and demonstrating the gradual nature of the agricultural dietary transition.

1. "Hunter-gatherers as models in public health" — Pontzer, H., Wood, B. M. & Raichlen, D. A. (2018), Obesity Reviews, 19(S1), 24–35.

https://doi.org/10.1111/obr.12785 Examines what extant hunter-gatherer data can and cannot tell us about optimal human diet and physical activity, cautioning against over-simplified "Paleo" prescriptions.

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Future Research Directions

The most transformative methodological advance on the horizon is the integration of proteomics with metagenomics in dental calculus analysis. While DNA identifies the organisms consumed, proteins can identify the specific tissues (muscle, marrow, root, seed) and even the processing methods (cooked versus raw, fermented versus fresh). As proteomic databases for archaeological species improve, it will become possible to reconstruct not just what was eaten but how it was prepared.

Ancient DNA from coprolites remains underexploited, particularly in the Old World. While New World coprolite studies have been productive, European and African sites have yielded fewer analysable specimens due to preservation conditions. Improvements in DNA extraction from degraded faecal material could unlock a wealth of dietary information from caves and rock shelters across the Palaeolithic.

The AMY1 copy-number question — how many copies of the salivary amylase gene did Palaeolithic humans carry, and when did copy-number expansion occur? — is technically challenging but scientifically important. Recent improvements in ancient DNA analysis of copy-number variation may make it possible to track AMY1 expansion through the Palaeolithic and Mesolithic, testing Hardy et al.'s (2015) hypothesis that starch reliance predates agriculture.

Compound-specific isotope analysis — measuring the isotopic ratios of individual amino acids or fatty acids rather than bulk bone collagen — promises higher resolution dietary reconstruction. This technique can distinguish between marine and terrestrial protein sources more precisely than bulk isotope analysis and can detect the consumption of specific food categories (e.g., freshwater fish versus marine shellfish).

Finally, the "Paleo diet" movement itself deserves rigorous evaluation through randomised controlled trials that compare the commercial Paleo diet with diets modelled on actual ethnographic hunter-gatherer eating patterns. The two are not the same; a diet based on Hadza eating, for example, would include substantial tubers, honey, and baobab fruit and would look quite different from the meat-and-vegetable prescription of the commercial Paleo diet. Such trials would clarify which features of hunter-gatherer diets actually confer health benefits and which are irrelevant.

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Summary of Existing Research and Public Opinion

The scientific evidence is clear: there was no single "Paleo diet." Palaeolithic human diets were as varied as the environments in which humans lived, ranging from heavily plant-based in tropical settings to heavily meat-based in sub-Arctic and steppe environments. The consistent features across all well-documented foraging diets are high dietary diversity, high fibre intake, low processed-food consumption, and seasonal variation. These features are more nutritionally relevant than any specific macronutrient ratio.

The modern Paleo diet movement has been valuable in drawing attention to the mismatch between evolutionary dietary history and modern industrial eating. However, it oversimplifies the ancestral pattern in several ways: by prescribing a single macronutrient template, by excluding foods (grains, legumes, dairy) that were consumed by various pre-agricultural populations, and by ignoring the central role of food processing (cooking, grinding, fermenting) in the human dietary niche.

Among researchers in nutritional anthropology, there is broad agreement that the most health-relevant lesson from evolutionary dietary studies is the importance of whole foods, dietary diversity, and high fibre intake — not the elimination of specific food groups. The debate has shifted from "what did we evolve to eat?" to "what consistent features of ancestral diets are most relevant to modern health?"

Public awareness of the topic is high, driven by the commercial Paleo diet industry, but public understanding is skewed. The image of the Palaeolithic hunter as a meat-eating warrior-athlete does not survive contact with the archaeological and ethnographic evidence, which consistently shows mixed diets with substantial plant components. The dental calculus revolution has been particularly effective at dismantling this stereotype.

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Where Do I Come In?

Diet is a subject where public interest is intense and where misinformation thrives. Observatory.wiki can provide a guide that takes the legitimate evolutionary question — what did humans eat before agriculture, and what can this tell us about modern nutrition? — and answers it with the best available evidence rather than with commercial dietary prescriptions.

The key editorial contribution is to centre the diversity of ancient diets. A single document that maps the range of Palaeolithic eating patterns — from the tuber-and-honey diets of tropical foragers to the marine-resource diets of coastal populations to the meat-heavy diets of steppe and Arctic hunters — would provide a far more accurate picture than the monolithic "Paleo diet" narrative. Including regional and seasonal variation is essential: the same population ate differently in summer and winter, in wet and dry seasons, in good years and bad.

The dental calculus revolution is an ideal subject for observatory.wiki's approach. The technique is novel, the results are surprising (Neanderthals eating mushrooms and pine nuts; early farmers developing cavities), and the methodology is accessible to non-specialist readers. Explaining how a tiny scraping of mineralised plaque from a 50,000-year-old tooth can reveal an individual's last meals is inherently compelling.

For readers interested in health and nutrition, the document can provide evidence-based guidance without prescriptive claims. The consistent features of healthy ancestral diets — whole foods, high fibre, dietary diversity, seasonal variation, minimal processed ingredients — are well supported and actionable. What the evidence does not support is the exclusion of entire food groups (grains, legumes, dairy) on evolutionary grounds.

Observatory.wiki's community can contribute by tracking the rapidly growing ancient dental calculus literature, by compiling regional dietary profiles from ethnographic and archaeological sources, and by critically evaluating the health claims of the commercial Paleo diet against the primary scientific literature. This is a topic where the gap between expert knowledge and public understanding is wide, and where a well-maintained, evidence-based guide can make a genuine difference.