Behaviors That Alter Your Genes to Improve Your Health & Performance | Dr. Melissa Ilardo

Gene Mixing

The historical genetic mixing between Homo sapiens and other hominids like Denisovans and Neanderthals has significantly shaped human genes. Melissa Ilardo explains that the introduction of new genetic material has led to some of the greatest adaptations in human history, such as the Tibetan high-altitude adaptation, which arose from the crossing of humans with Denisovans 1. This genetic mixing has allowed humans to develop advantageous traits, enhancing resilience in changing environments. Ilardo notes, "As long as there are things that are affecting our ability to reproduce, we're going to continue to evolve."

Evolution doesn't care how fit you are in the way we think of fitness. It only cares how you fit with your environment.

--- Melissa Ilardo

This ongoing evolution challenges the notion that humans have reached an ultimate point of evolution, emphasizing the dynamic nature of genetic adaptation 2.

   

Dietary Evolution

Human diet has been a powerful driver of evolutionary adaptations, such as lactase persistence and lipid metabolism. Melissa Ilardo highlights how certain populations, like the Greenlandic Inuit, evolved to metabolize high lipid content from marine mammals, preventing heart disease 3. This adaptation showcases the strong influence of diet on gene selection and trait development.

Diet is an incredible driver of selection.

--- Melissa Ilardo

Additionally, Ilardo discusses the cardiovascular adaptations in Korean women divers, where training leads to a significant slowing of heart rate, a phenomenon not observed in non-divers with the same genetics 4. This highlights the interplay between genetic and physiological adaptations driven by lifestyle and environment.