An Explanation of the ORAC Scale
ORAC - stands for Oxygen Radical Absorption Capacity and is a scale supported by the USDA to measure antioxidant capacities of foods and essential oils. The higher the ORAC value, the more a food or essential oil is able to destroy free radicals in the body and therefore retard the ageing process and help prevent disease.
Free radicals, and the damage they can do at the cellular level, have received a lot of attention in the last few years. The oxidative stress caused by free radicals – which are produced during normal metabolism and cell function, as well as from stress and pollutants in our air, water and food – is implicated in everything from aging and wrinkling of skin to DNA damage, diabetes, cancer and heart disease. Antioxidants offer powerful, effective protection for your body and cells against their oxidative stress, by blunting the damaging effects of free radicals.
A study published in 2005 in the American Journal of Clinical Nutrition by Ilja CW Arts and Peter CH Hollman states
"In addition to their antioxidant properties, polyphenols show several interesting effects in animal models and in vitro systems; they trap and scavenge free radicals regulate nitric oxide, decrease leukocyte immobilization, induce apoptosis, inhibit cell proliferation and angiogenesis, and exhibit phytoestrongenic activity"
Phenols are a main constituent in essential oils such as Clove and Wintergreen. You can see from the list below that Clove essential oil contain the highest ORAC of any known substance on the earth! Measured in micromole Trolox Equivaments pr 100 grams, the ORAC values are often listed in other publication as measured in 'use per liter' which would add another zero to the end of the numbers. In the following table, the essential oil ORAC values are listed in grams.
One of the highest ORAC of a healthy food source is found is wolfberries coming in at 25,300 which blueberries at 2,400 to give you a reference. Raw cacao power is around 100,000.
ESSENTIAL OILS AND ORAC
- Clove 1,078,700 !!!
- Myrrh 397,800
- Citronella 312,000
- Clary Sage 221,000
- Cedarwood 169,000
- Rose 160,400
- Ylang Ylang 130,000
- Wintergreen 101,800
- Geranium 101,000
- Vetiver 74,300
- Blue Tansy 68,800
- Spikeard 54,800
- Peppermint 37,300
- Cypress 24,300
- Grapefruit 22,600
- Oregano 15,300
- Cinnamon 10,340
- Lemongrass 1,780
- Helichrysum 1,740
- Lemon 660
- Frankincense 630
- Lavender 360
Wolfberries 25,300
Blueberries 2,400
Reference: The Essential Oil Truth - The Facts Without the Hype by Jen O'Sullivan
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