Dr. Pete Sulack on Instagram: "🔥Natural Killer (NK) cells are your body’s frontline defenders — designed to identify and destroy cancer cells and virally infected cells. The stronger your NK cells, the more resilient your immune system becomes. ✅Research shows NK cell activity declines with age, chronic stress, obesity, and poor lifestyle habits. But you can boost them naturally through targeted nutrition, movement, and lifestyle strategies: 1️⃣ Nutrition • Mushrooms (shiitake, maitake, reishi)