ORAC Value

ORAC (Oxygen Radical Absorbance Capacity) is a laboratory measure of the antioxidant capacity of a substance, expressed in micromol Trolox equivalents per 100g or 100ml. Though the USDA removed its ORAC database in 2012 citing insufficient evidence linking ORAC values to in vivo health benefits, ORAC remains widely used in functional food and beverage marketing.

The ORAC assay was developed by USDA researcher Guohua Cao in the 1990s and initially published as a ranking system for antioxidant-rich foods. The USDA published an ORAC database for foods and beverages until 2012, when it was withdrawn with the explanation that ORAC values do not reliably predict antioxidant activity in the human body — bioavailability, absorption, and cellular context all differ from the in vitro assay conditions. Despite this official withdrawal, ORAC values continue to be used extensively in functional food and beverage marketing globally.

The in vivo relevance question remains scientifically live. While ORAC values do not directly predict clinical health outcomes, they do correlate reasonably well with polyphenol content, which itself correlates with demonstrated health effects in epidemiological studies. Using ORAC as a proxy for phytonutrient richness — rather than as a direct clinical prediction — maintains some scientific defensibility.

For zero-proof beverage producers using ORAC in marketing materials, the most honest approach is to present it as a comparative measure of polyphenol-type antioxidant content rather than a health claim. 'Our elderberry kombucha contains X micromol TE per 100ml of antioxidant capacity, comparable to Y ml of blueberry juice' is a factual statement about a measured property; 'our product fights free radical damage' is a health claim requiring regulatory support.

A practical consideration: the ORAC test is inexpensive and widely available through food testing laboratories (Eurofins, SGS, Intertek all offer it). Commissioning ORAC testing and publishing results provides transparency and a factual anchor for antioxidant positioning even without regulatory health claim authorization. For Belgian and European markets where consumers are increasingly scientifically literate about nutrition claims, analytical transparency is a more durable marketing strategy than unsupported claims.