While it is customary to measure age chronologically, by birthday, science is proving that it is our biological age that matters most to determine the length of healthspan or amount of time a person will maintain good health. Francis Palmer, MD, a world-renowned, board-certified facial plastic surgeon, and author of “What’s Your Number?” has spent more than three decades of his career helping people look younger by altering outside appearances under the knife, but has now dramatically shifted his career focus to helping people learn ways to turn back the clock from the inside out, and the best part is, no surgery is required. Dr. Palmer visits on this edition of Late Night Health.