In the world of longevity, attention often revolves around trendy supplements, new molecules, and promising therapies—NAD+, NMN, peptides, senolytic protocols. Yet one of the most important biological factors remains almost invisible: metabolic flexibility—the body’s ability to efficiently switch between glucose, fats, and ketones as fuel. This is where many problems related to fatigue, impaired energy[…]

Do you want greater endurance, faster recovery, and a clear mind? Start at the place where all of this is created — the mitochondria. They are not just “powerhouses” — they determine how young, vital, and resilient you are at the cellular level. 1. Train smart, not just hardHigh-intensity interval training (HIIT) stimulates mitochondrial biogenesis[…]