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Antioxidant Powerhouse
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Olive Leaf Australia's Extract (Pure 1:1) |
679,572 µmol TE/L |
Olive Leaf Australia's Extract |
298,642 µmol TE/L |
All results expressed in the international standard of Trolox Equivalents (TE) in
micromoles per litre of sample.
Testing and data provided by Brunswick
Laboratories, Massachusetts, USA.
To see how the ORAC or TAC (Total Antioxidant Capacity) results for Olive Leaf Australia's Extract compare with other products CLICK HERE
What does an ORAC/TAC result really mean?
ORAC/TAC testing is not the 'final word' on antioxidant capacity. However, it is the most accurate and effective international standard for the measurement of a product's or food's antioxidant capacity.
ORAC/TAC testing is an in vitro laboratory test which is naturally limited by its parameters and applications. However, researchers have recently made significant gains in being able to compare in vivo and in vitro outcomes1, 2 and whilst it is still not yet concrete ORAC/TAC is beginning to appear more often in reference to in vivo antioxidant activity rather than just its proven in vitro value.
It must also be noted that different antioxidants target different free radicals. Having an ORAC/TAC value of say 27,000 for a single polyphenolic antioxidant that targets only one group of free radicals may leave patients vulnerable to the free radical groups that are not targeted. Also, different antioxidants work in different areas of the body. Some work effectively in the cardiovascular system, while others are active in the brain, colon or liver.
For antioxidants, a complete picture of efficacy must be established. It is nice to have a high ORAC/TAC score, as a basic indicator of a compound's in vivo antioxidant potential, but it is even better to have proof that the specific antioxidant compounds have biological value.
Just because a particular antioxidant has a high ORAC/TAC value does not mean that it is actually assisting a health condition. Each product or compound must also show evidence of actual cell protection or other measures of biological activity in living systems. CLICK HERE FOR SCIENTIFIC STUDIES that support the health benefits of Olive Leaf Australia's Olive Leaf Complex and its polyphenolic antioxidants. (You will be redirected to the RESEARCH section of the EnvirOléa® website which will open in a new window.)
Are the Olive Leaf Australia's Extract polyphenols bio-available in vivo?
Yes. Whilst not every one of the polyphenols in Olive Leaf Australia's Olive Leaf Complex have been tested in vivo (in the body), the key compounds, oleuropein, hydroxytyrosol and caffeic acid have been assessed with very positive results.3, 4
PLEASE NOTE: There are no data errors on this page. The ORAC and TAC results are as per the results shown on the graphs. The tests were completed using the internationally recognized ORAC/TAC techniques developed by Brunswick Laboratories (Wareham, Massachusettes, USA). When combined with the in vivo scientific studies available, this is arguably one of the most exciting natural antioxidant discoveries ever made.
1. Marnewick JL, Joubert E, Swart P et al., 'Modulation of hepatic drug metabolizing enzymes and oxidative status by rooibos (Aspatlathus linearis) and honeybush (Cyclopia intermedia), green and black (Camellia sinensis) teas in rats.' J Agricul Food Chem, 2003;51:8113-8119.
2. Yeh CT, Yen GC, 'Effects of phenolic acids on human phenolsulfotransferases in relation to their antioxidant activity.' J Agric Food Chem. 2003 Feb 26;51(5):1474-9.
3. Vissers, MN, Zock, PL, Roodenburg, AJ, Leenen, R, Katan, MB, 'Olive oil phenols are absorbed in humans.' J-Nutr. 2002 Mar; 132(3): 409-17, 2002.
4. Tsarbopoulos, A, Gikas, E, Papadopoulos, N, Aligiannis, N, Kafatos., 'Simultaneous determination of oleuropein and its metabolites in plasma by high-performance liquid chromatography.'
J-Chromatogr-B-Analyt-Technol-Biomed-Life-Sci. 2003 Feb 25; 785(1): 157-64.