In the 1930s, long before ultra-processed food dominated grocery stores, Weston A. Price traveled the world studying isolated populations eating traditional diets.

He observed strong teeth, broad facial structure, and low chronic disease rates — until refined flour, sugar, and canned foods were introduced.

Health declined rapidly within a single generation. Price warned that replacing real food with industrial substitutes would have long-term biological consequences.

His findings conflicted with post-war food industrialization and their profits, hence, processed food became normalized.