Stress hormones burn 60% of your daily energy, but reversing grey hair and boosting vitality is possible through mitochondrial optimization. Mitochondrial scientist Dr. Martin Picard reveals why proper energy allocation—not genes—determines aging speed, and how understanding your body's 5,000 trillion mitochondria transforms health, mood, and disease prevention. Stress hormones increase energy expenditure by 60%, stealing resources from cellular maintenance and aging processes.