Your body has a master antioxidant called glutathione. Every cell makes it. Every cell needs it. And when it runs low, everything starts breaking down.

Oxidative stress accelerates. Your liver struggles. Your immune system weakens. Inflammation spreads unchecked.

The problem is you can't just swallow glutathione. It gets destroyed in your digestive tract before reaching your cells.

But there's a back door. N-Acetyl Cysteine — NAC.

NAC is the rate-limiting precursor to glutathione. Your body has everything else it needs — it's just waiting on this one ingredient. Give it NAC, and production ramps up. Your cells start manufacturing their own supply again.

From my research, NAC supplementation significantly increases intracellular glutathione levels. Not in a test tube. In living humans.

Your liver — responsible for processing every toxin, medication, and metabolic byproduct — depends heavily on glutathione. NAC has been used in hospitals for decades to treat liver toxicity. That's not alternative medicine. That's standard emergency protocol.

For immune defence, glutathione powers the white blood cells that fight infections. It modulates inflammation — not by suppressing it, but by preventing runaway inflammatory cascades that damage your own tissue.

NAC also breaks down mucus in the respiratory tract. It's used clinically for lung conditions.

600 milligrams daily on an empty stomach. Some people split it into two 600-milligram doses for specific health goals — but one daily is a strong foundation.

This is the compound that ties everything together. Vitamin C regenerates glutathione. Zinc powers the immune cells. D3 activates them. And NAC ensures your body can actually produce the master molecule that protects all of it.

Your immune fortress is complete.