Glutathione: Why Your Body's Master Antioxidant Matters More Than You Think

Glutathione is the most abundant antioxidant in the human body. Unlike vitamin C or vitamin E — antioxidants you consume from food — glutathione is made inside your cells. It is produced in every cell in the body, but it is most concentrated in the liver, where it plays a central role in detoxification.

When glutathione levels are adequate, your cells are protected from oxidative damage, your liver processes toxins efficiently, and your immune system functions at its best. When levels fall — through ageing, chronic illness, poor nutrition, or impaired methylation — the consequences touch virtually every system in the body.

What Glutathione Does

Glutathione functions as the body's primary antioxidant defence — neutralising free radicals before they damage DNA, proteins, and cell membranes. It is the rate-limiting factor in the liver's Phase II detoxification pathway, conjugating and neutralising toxins, heavy metals, and metabolic waste products. It regulates the immune system, modulating both inflammatory and anti-inflammatory responses. It regenerates other antioxidants — including vitamins C and E — by recycling their oxidised forms back to their active state. And it directly supports mitochondrial function, protecting the energy-producing machinery of cells from oxidative damage.

Why Glutathione Levels Fall

Glutathione depletion is one of the most consistent findings in chronic illness. Factors that reduce levels include ageing, chronic stress, poor diet and nutrient deficiency, alcohol use, smoking, environmental toxin exposure, chronic infections, and — critically — impaired methylation. The transsulphuration pathway, which produces the cysteine needed for glutathione synthesis, runs directly from homocysteine and depends on adequate P5P B6 and a functioning methylation cycle. MTHFR impairment therefore compromises glutathione production at the biochemical level.

Glutathione Supplements: Do They Work?

Oral glutathione supplementation is available, but bioavailability has historically been questioned — glutathione is broken down in the gut before it can be absorbed intact. Liposomal glutathione and reduced L-glutathione formulations have shown better absorption in recent research. N-acetylcysteine (NAC) — a glutathione precursor — is well-absorbed and reliably raises cellular glutathione levels. Supporting the methylation cycle with methylfolate, methylcobalamin, and P5P B6 addresses glutathione insufficiency at its upstream biological source.

NeuroThrive™ products are food supplements and are not intended to diagnose, treat, or cure any medical condition.