In a groundbreaking study published in Science, researchers have unearthed fascinating insights into the long history of human affinity for carbohydrates. Contrary to the prevailing belief that early humans primarily subsisted on a meat-heavy diet, archaeological evidence now suggests that starchy foods played a significant role in their culinary repertoire.
By analyzing the genomes of 68 ancient humans, the scientists focused on the AMY1 gene responsible for breaking down starch into digestible sugars. Surprisingly, hunter-gatherers as far back as 45,000 years ago possessed multiple copies of this gene, indicating a penchant for starch well before agriculture shaped human diets.
Moreover, the study revealed that Neanderthals and Denisovans also carried duplicated versions of the AMY1 gene, suggesting a common ancestral trait shared across human lineages. This genetic adaptation, dating back as far as 800,000 years, provided an advantage for humans as they encountered diverse environments and dietary challenges.
Notably, the research highlighted a rapid increase in AMY1 gene copies in the past 4,000 years, coinciding with the shift to agriculture and the consumption of starch-rich crops. This evolutionary adaptation likely fueled brain development and survival, underscoring the importance of carbohydrates in human history.
Experts lauded the study for providing compelling evidence of how starch digestion evolved in humans and shedding light on the energizing role of carbs in human brain expansion. Moving forward, continued exploration of ancient genomes promises to unveil more secrets about our enduring relationship with starchy foods and the impact of dietary shifts on human evolution.