Koalas for Kids | Learn all about these sleepy marsupials - Videos For Kids

Are redheads harder to anesthetize? Yes—but that’s not the most important part of the story. Research shows that people with red hair often carry variants of the MC1R gene, which can alter pain perception and anesthetic requirements. On average, studies suggest ~20% higher dosing needs for certain anesthetic agents. But MC1R isn’t just a “hair color gene.” It’s active in the brain, where it influences: • neuro-inflammatory signaling • blood vessel behavior • dopamine pathways • cellular response