Our changing diets: What we eat now vs. what our ancestors ate

Long before supermarkets or food pyramids existed, our great-great-great grandparents survived on whatever they could scavenge, hunt, or forage. Some groups in East Africa over three million years ago used sharp rocks to slice meat from bones, proving they weren’t just picking at leftovers—they were active eaters. By 1. 5 million years ago, some began hunting instead of waiting for scraps. Evidence from a 2021 study suggests early humans depended on meat for energy, much like wolves or hyenas. Their digestive systems were built tough, using strong stomach acid to break down food and kill harmful bacteria.But meat wasn’t the only option. Humans have special genes that help digest starchy foods like tubers—a skill most primates don’t have. Fossils from 3 to 4 million years ago show some ancestors ate mostly plants with little to no meat. The shift toward more meat happened later when better tools made hunting more efficient. Fire also played a huge role. Cooking softened both plants and meat, helping bodies absorb more energy. That extra fuel might have even helped our brains grow larger over time. So, are humans meant to eat meat or plants? The answer isn’t clear-cut. Our bodies adapt well to different foods. Early humans ate based on what was available—meat was useful, but not the only choice. Today’s meat is very different from what early humans consumed. Processed and factory-farmed meat can be unhealthy, while wild game is closer to their diet. The real lesson isn’t about following strict food rules today, but figuring out what works best for our bodies now.