Quote · The Tucker Carlson Show
The Number One Way to Fight Alzheimer’s, Depression and Anxiety Before It’s Too Late
Where this was said
Autophagy, Lithium, and Cellular Immortality
At 1:12:53 · chapter starts 1:12:10
Nehls zooms out to the deepest biology: every neuron you are born with must last 100 years. Because neurons cannot be replaced (unlike hippocampal index neurons), they must self-maintain through autophagy — the process of digesting worn-out proteins and dysfunctional mitochondria before they accumulate as toxic debris. Autophagy is activated when the IMPASE enzyme is inhibited; magnesium activates IMPASE (like a gas pedal) and lithium inhibits it (like a brake). Homeostasis requires both. Fasting also promotes autophagy, but Nehls argues it works much better with adequate lithium. He traces this mechanism back to the last universal common ancestor — the first cell that ever existed — making autophagy and its lithium dependence as old as life itself. Tucker asks about fasting; Nehls confirms it is a powerful trigger, but lithium is the 'key that makes it actually work.'
Autophagy — the process by which cells digest their own damaged components — is the oldest cellular defense in life's history. Lithium activates it by inhibiting the IMPASE enzyme; without lithium, even fasting cannot fully engage it, leaving neurons to accumulate toxic debris.
The European Chemical Agency concluded that up to 85 milligrams of lithium per day causes no long-term harm — 85 times the recommended 1 mg dose.
