Environmental Protection Factor (EPF®),the measure of antioxidant protection
You are probably familiar with Sun Protection Factor or SPF, the measure of sunscreen protection. Sunscreens protect against UV radiation, but do not neutralize free radicals. You need to use a topical antioxidant to form a skin-protective shield distinct from SPF. For everyday protection, you need both high SPF and high EPF® on your skin. EPF® is the measure of effectiveness of an antioxidant shield.
In a clinical comparison with other commonly used antioxidants, the 1% concentration of idebenone found in PREVAGE® MD was proven to be more effective.1 These other antioxidants include kinetin (found in Kinerase®), coenzyme Q10 (found in products such as Q10 Advanced Wrinkle Reducer products from Nivea®), lipoic acid (found in N.V. Perricone M.D. Cosmeceuticals®), vitamin C, and vitamin E (both found in many anti-aging products).
Idebenone demonstrated the highest EPF® activity of any antioxidant tested: 95 out of 100. Idebenone is what makes PREVAGE® MD so effective.

