🧬 The Truth About Nicotine: Nutrient or Drug? Did you know that nicotine plays an essential role in your body? Every cell in your heart, brain, and even your pancreas relies on it. For instance, insulin production can’t happen without nicotine. Even your T cells—the immune cells that protect you from respiratory infections like flu and pneumonia—depend on nicotine receptors to activate. Yet, for decades, we’ve been told nicotine is harmful, classified as a drug. But here’s the twist: nicotine i