In the early 1930s, a Canadian-born dentist named Weston A. Price started noticing something troubling in his Cleveland practice. Children born to immigrant families showed dramatically more tooth decay, crowded teeth, and skeletal deformities than their parents, who had grown up in their countries of origin. The difference wasn't genetics. The parents and children shared the same bloodlines. What had changed was the food.

Price was a respected researcher and Fellow of the American Dental Association. He wasn't a fringe figure or a health influencer. He was a methodical scientist who decided to follow the evidence wherever it led, and it led him around the world.

Between 1931 and 1948, Price and his wife Florence traveled to 14 distinct indigenous cultures across the globe. He brought portable equipment to measure dental health, took thousands of photographs, collected food samples, and analyzed the diets of each population with scientific precision. The result was his 1939 book, Nutrition and Physical Degeneration, one of the most comprehensive anthropological studies of traditional food systems ever conducted.

What he found about how these cultures fed their children is still relevant today. Perhaps more relevant than ever.

What he found

Price visited remote Swiss villages, Gaelic communities in the Outer Hebrides, indigenous peoples of North and South America, Melanesian and Polynesian islanders, African tribes, Australian Aborigines, and New Zealand Maori. The populations were vastly different from each other in culture, climate, and tradition. But they shared something in common.

Among groups eating their traditional diets, Price found the same things everywhere: straight teeth, freedom from decay, strong physiques, and resistance to disease. When those same groups, or neighboring groups, adopted modern processed foods such as white flour, sugar, canned goods, and vegetable oils, physical degeneration followed within a single generation. Dental decay appeared. Facial structures narrowed. Children were born with crowded teeth and weaker constitutions than their parents.

The difference wasn't time or genetics. It was food.

Sacred foods for pregnancy and children

One of Price's most striking findings was the care with which traditional cultures nourished pregnant women and young children. Across every culture he studied, certain foods were treated as sacred and reserved specifically for this purpose. These foods were given to couples before conception, to women during pregnancy and nursing, and to children during their growing years.

The foods varied by geography and culture but shared a common nutritional profile: they were rich in fat-soluble vitamins, particularly vitamins A, D, and K. They included:

These weren't random choices. These were the foods that traditional cultures had identified over thousands of years as the ones that produced healthy, robust children. Price's laboratory analyses confirmed why: these foods contained the fat-soluble vitamins and minerals that modern processed foods almost entirely lack.

What traditional cultures fed babies

Price's observations on infant feeding were equally striking. Across the cultures he studied, babies were not weaned onto grains, fruit purees, or commercially prepared foods. The first solid foods were typically:

Egg yolks

Fed early, sometimes before six months, recognized as brain food before anyone understood what choline was.

Liver

Often pre-chewed by the mother and fed directly to the infant. Rich in iron, B12, and fat-soluble vitamins.

Bone broth and meat broths

Used as a base for early foods and offered as a warming drink before and alongside solid meals.

Fish and fish eggs

In coastal cultures, these were among the first animal foods introduced to infants.

Fermented foods

Many traditional cultures included small amounts of fermented dairy or vegetables in infant diets from early on, long before probiotics were a concept.

What was absent from traditional infant diets was equally significant. No rice cereal. No fruit pouches. No grain-based first foods at all in most cultures. The emphasis was on nutrient density, not caloric bulk.

What happened when traditional diets were abandoned

Price documented what happened when these same cultures came into contact with modern processed foods. The shift was often rapid and the consequences visible within a single generation.

Children born after the dietary shift showed narrower faces and jaw structures, crowded and crooked teeth, more frequent illness, and weaker overall constitutions than their parents. Price photographed families side by side: parents with wide, strong facial structures and perfect teeth next to their children, born after the introduction of processed foods, with narrow faces and crowded mouths.

He was clear that this was not genetic. The same bloodlines, the same communities, the same geography. Different food, and dramatically different outcomes.

What this means for feeding your baby today

Price was an observer and a documentarian. He did not prescribe a specific diet or tell parents exactly what to feed their children. What he did was show, with meticulous documentation, that traditional cultures around the world had independently arrived at similar conclusions about what children need to grow well.

Those conclusions point toward a few consistent principles:

Principles from traditional cultures

  • Nutrient density over caloric bulk. The first foods that mattered in traditional cultures were the most nutrient-dense available, not the most convenient or the most filling.
  • Fat-soluble vitamins are foundational. Vitamins A, D, and K, found in organ meats, animal fats, fish, and dairy, appear consistently in the sacred foods of traditional cultures. They are also the nutrients most absent from modern processed diets.
  • Animal foods first. Across cultures Price studied, animal-based foods dominated the early diet. Grains, when eaten, were prepared carefully through soaking, fermenting, or sprouting. They were never served raw or as a quick convenience food.
  • The whole family eats together. In most traditional cultures, babies graduated naturally from breast milk to the foods the family was already eating, prepared softer and served in smaller amounts. There was no separate baby food category.

A note on Price's work and its limitations

Price's research was observational. He was not a trained anthropologist and did not conduct controlled trials. Critics have noted that he may have selected populations that supported his conclusions and documented the most visually striking cases. These are legitimate methodological concerns and worth noting.

What is harder to dismiss is the consistency of his findings across 14 completely different cultures, the photographic documentation he left behind, and the fact that the foods he identified as sacred, including organ meats, fish liver oil, bone broth, and egg yolks, are the same foods that modern nutritional research consistently finds to be among the most nutrient-dense available.

His work is a starting point, not a final answer. But it is a starting point that asks a question worth sitting with: if cultures around the world, with no communication between them, all arrived at the same conclusions about what to feed their pregnant women and young children, what did they know that we have forgotten?