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Limited evidenceLongevity & antioxidants

Mixed Tocopherols (Gamma-Tocopherol)

The vitamin E fraction that dominates the Western diet but is left out of most supplements. Small trials in airway inflammation give mixed results, and no outcome trial supports mixed tocopherols over plain alpha-tocopherol.

Evidence last reviewed: August 2026

What the science says

  • Airway inflammation Limited evidence

    A pilot randomized clinical trial of gamma-tocopherol supplementation before wood smoke exposure examined neutrophilic and eosinophilic airway inflammation, with limited and preliminary effects. An earlier randomized study of LPS-induced sputum neutrophilia found the response was not modified by BMI or GSTM1 genotype, and the overall picture across these small trials remains inconsistent.

  • Advantage over alpha-tocopherol alone Limited evidence

    The rationale is that high-dose alpha-tocopherol depletes gamma-tocopherol, which is better at quenching reactive nitrogen species. That mechanism is well characterized, but no randomized trial has shown mixed tocopherols produce better clinical outcomes than alpha-tocopherol or placebo.

Dosage & safety

Studied doseAirway trials used roughly 800 mg/day of gamma-tocopherol for one to two weeks. Consumer mixed-tocopherol products typically supply 100–400 IU of total vitamin E with a stated gamma fraction.
SafetyHigh-dose vitamin E of any form increases bleeding risk and interacts with warfarin and antiplatelet drugs; stop before surgery. Long-term high-dose alpha-tocopherol has been associated with increased all-cause mortality in some meta-analyses and with prostate cancer risk in the SELECT trial. Keep total vitamin E within the upper intake level of 1,000 mg/day and preferably far below it.

Scientific references

Where to buy

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