Place the following four antioxidants in descending order of their reduction potential (ability to donate electrons to oxygen species):

Glutothione
Vitamin C
Vitamin E
Ubiquinol (reduced form of Coenzyme Q₁₀)

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Based on their molecular formulas I am going to say:

Ubiquinol (highest potential)
Vitamin E
Glutathione
Vitamin C (lowest potential)

Answer noted

From highest to lowest:

1. Ubiquinol
2. Glutathionine
3. Vitamin E
4. Vitamin C

Based on 1 electron reduction potential, from highest to lowest:

1.Glutathione
2.Ubiquinol
3.Vitamin C
4.Vitamin E

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Listed by one-electron reduction potentials in milliVolts (mV) at pH 7.0. the values are:

The reduced form of each can neutralize or "reduce" free radicals having a higher potential.

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