Longevity

Glutathione: Your liver's favorite antioxidant

How the body's master antioxidant supports phase II detox, neutralizes oxidative stress, and gradually brightens skin tone from the inside out.

DP
Dr. Priya Nair, MD
Integrative & functional medicine
May 28, 20264 min read
Glutathione: Your liver's favorite antioxidant
4–8 wk
Time to visible skin clarity
100%
Cells that depend on glutathione
Key takeaways
  • Glutathione is the body's master antioxidant — every cell makes and uses it.
  • Oral glutathione is poorly absorbed; injection delivers it intact.
  • Skin clarity typically appears between weeks 4 and 8.

Glutathione is a tripeptide your cells make from glutamine, glycine, and cysteine. It's the front-line antioxidant inside every cell — neutralizing free radicals, recycling vitamins C and E, and shuttling toxins out of the liver through the phase II detox pathway.

Why injection beats oral

Oral glutathione is largely broken down in the gut before absorption — only a small fraction reaches systemic circulation. Subcutaneous and IM injections deliver it intact, raising plasma levels enough to actually support phase II liver detoxification at therapeutic doses.

Skin clarity, explained

Glutathione gradually brightens skin tone by inhibiting tyrosinase (the enzyme that produces melanin) and protecting against UV and pollution-driven oxidative damage. It's not a bleaching agent — expect a healthier, clearer, more even tone over weeks 4–8 of consistent use, not overnight changes.

  • Reduces oxidative pigmentation
  • Supports phase II liver detoxification
  • Recycles vitamins C and E
  • Protects against environmental damage
"Patients often notice their skin first — but the real work is happening inside the liver."
Dr. Priya Nair, MD

Source: PubMed (NIH)

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