Dr. Jin-Xiong She is a world-renowned scientist, professor, and entrepreneur at the forefront of longevity research and precision health. As the founder of Jinfiniti Precision Medicine, he pioneered the first commercial NAD+ test and leads the industry in biomarker testing for aging, performance, and cellular health.With over 30 years of groundbreaking research in genomics, molecular biology, and disease prevention, Dr. She has authored more than 300 peer-reviewed publications and received numerous honors for his contributions to science and medicine.His journey into the science of longevity began with a profound loss-an experience that made the pursuit of longer, healthier lives not just a professional endeavor, but profoundly personal. This book distills his life's work into one accessible truth: Longevity is not just a number. It's a choice. And it starts with you.