Long before food labels, supplements, or the word “micronutrient” existed, traditional cultures across completely different continents independently arrived at similar solutions to the same nutritional problems: fermentation, organ consumption, and whole-animal, whole-plant eating. None of these practices were explained in biochemical terms at the time, but they may have helped people get the nutrients they needed, in ways modern nutrition science can now describe in detail.
Fermentation: One of the Oldest Food Technologies
The earliest evidence of deliberate food fermentation dates back to roughly 7000–6600 BCE, based on residue found in pottery vessels at Jiahu in China (a drink made from rice, honey and fruit). Fermented foods and beverages remain an important part of diets around the world today.
The nutritional value of fermentation goes beyond preservation. During fermentation, microbial activity can improve the bioavailability of some nutrients, allowing the body to absorb more of what the food already contains.
Traditional fermented foods can provide proteins, essential fatty acids, soluble fiber, minerals, vitamins, and amino acids. Some fermented foods also contain lactic acid bacteria that may influence the gut microbiome.
In practical terms, fermented dairy, vegetables, and grains were more than a way to prevent spoilage before refrigeration. They helped traditional communities preserve food while potentially making some of its nutrients more accessible.
Organ Meats: Nutrient-Dense, but What Do We Actually Know?
Across hunting cultures on nearly every continent — Arctic, African, and Asian populations included — a strikingly consistent pattern shows up in the historical and anthropological record: organ meats, particularly liver, heart, and kidney, were eaten first and treated as the most valuable part of the animal, often before the muscle meat was even processed. This wasn’t a matter of taste preference. Liver in particular concentrates preformed vitamin A, heme iron (the most bioavailable form of iron), B12, folate, and multiple trace minerals at levels that would require eating far larger quantities of muscle meat to match.
In the early 20th century, dentist Weston A. Price described traditional populations eating diets rich in organ meats, raw dairy, fermented foods and whole grains. His observations are widely cited but were not controlled studies, so they cannot show that these foods prevented disease. As Western diets industrialized through the 20th century, muscle cuts increasingly replaced organ meats in everyday eating — a shift driven by convenience, changing culinary preferences, and the fact that organs are more perishable, not by any nutritional advantage.
Why These Foods Could Help Prevent Deficiency
Both practices — fermentation and organ consumption — solve a problem that’s easy to overlook in a world of fortified, calorie-dense processed food: getting enough micronutrients from a limited range of available ingredients. Populations without access to diverse, imported produce year-round needed to extract maximum nutritional value from whatever was locally available, and both practices do exactly that — fermentation by increasing nutrient bioavailability within plant and dairy foods, organ consumption by concentrating multiple micronutrients into a small portion of food. It’s a very different strategy from the modern approach of eating in bulk from a narrow selection of muscle meat and refined staples, then correcting gaps with synthetic supplements.
What Did Ancient Humans Actually Eat?
Archaeology tells us far more about bones and stone tools than about plants, which rarely survive, so reconstructions of ancient diets are partial. Research featured by the EU’s Horizon magazine describes evidence that Stone Age people processed starchy plants, not only meat. For the full picture, see our guide to what ancient humans ate before agriculture.
Evidence Check: Fermentation
The oldest chemical evidence usually cited is from Jiahu, China, where residue in pottery dated to about 7000–6600 BCE showed a drink made from rice, honey and fruit (hawthorn and/or grape), according to the Penn Museum. That shows people made fermented drinks, not that fermentation prevented deficiency. A 2015 review in Nutrients notes that fermented foods have been eaten for thousands of years and can be easier to digest (for example by breaking down lactose), but the human studies are small and the evidence is limited; fermented fish also raised safety concerns.
Evidence Check: Organ Meats and Safety
A 2024 review in Nutrients reports that liver is dense in vitamin A, vitamin B12, iron and folate, while calling the available data scattered and limited. Modern nutrient tables do not tell us what ancient people ate or relied on. Liver is also very high in vitamin A, so NHS 111 Wales advises eating it no more than once a week and avoiding it in pregnancy.
Scurvy and Pellagra: Deficiency in Recent History
The clearest stories about deficiency are recent, not ancient. In 1747 James Lind compared six treatments on 12 sailors with scurvy aboard HMS Salisbury, yet fruit juice was not formally adopted by the Navy for about 42 years (Tröhler, 2005). Pellagra, caused by niacin deficiency, is linked to diets built on maize, where niacin is bound and tryptophan is low; a 2018 review notes it is disputed whether traditional maize processing was the main reason some populations avoided it. For the discovery of vitamins, see our vitamin history guide.
Frequently Asked Questions
How old is food fermentation as a practice?
Archaeological evidence points to deliberate fermentation dating back to around 7000 BCE, based on vessel finds in China, making it one of the oldest known food processing technologies.
Does fermentation actually improve nutrition, or just preserve food?
Both. Fermentation increases the bioavailability of nutrients already present in food, meaning more of those nutrients can actually be absorbed, in addition to extending shelf life.
Why did traditional cultures prioritize eating organ meats?
Organ meats, especially liver, concentrate vitamin A, heme iron, B12, folate, and trace minerals at levels far higher than muscle meat, making them an efficient way to prevent multiple deficiencies from a small portion of food.
Who documented the health of traditional, unprocessed-food populations?
Dentist and researcher Weston A. Price studied isolated traditional populations in the early 20th century and described diets rich in organ meats, fermented foods, raw dairy and whole grains; his work was observational and is not proof of cause and effect.
Why did organ meat consumption decline in modern diets?
Industrialization, changing culinary preferences, and the greater perishability of organ meats compared to muscle cuts all contributed to their decline through the 20th century, not any nutritional disadvantage.
Did ancient people have scurvy? Scurvy is best documented in recent history, especially among sailors in the 18th century. This article does not claim how common it was in ancient times.
Does fermentation add vitamins? Fermentation can make some nutrients easier to absorb and break down compounds such as lactose, but effects vary by food and evidence in people is limited.
Is liver safe to eat in pregnancy? NHS 111 Wales advises avoiding liver in pregnancy because of its high vitamin A content. Check with a midwife or GP.
Conclusion
Fermented foods and organ meats represent two independently discovered, pre-scientific solutions to the same nutritional challenge that the mystery diseases caused by missing nutrients describes from the disease side: how to avoid deficiency without any formal understanding of vitamins or minerals. Traditional cultures got there through trial, observation, and necessity, centuries before modern nutrition science could explain exactly why it worked.
Sources & Further Reading
- Penn Museum: Jiahu fermented beverage residue
- Chilton, Burton & Reid (2015), Nutrients: fermented foods
- Latoch et al. (2024), Nutrients: offal review
- NHS 111 Wales: vitamins and minerals
- Tröhler (2005), J R Soc Med: Lind and scurvy
- Viljoen et al. (2018), S Afr J Sci: pellagra
- Horizon magazine (2020): Stone Age humans and plant starch
Primary source: Traditional Fermented Foods and Beverages from around the World and Their Health Benefits, NCBI.
