|I would not expect "red palm olein wonders", but more RPO and less corn oil in the American diet may at least buffer the liver disease burden in the US (the figure is based on data provided by the American Liver Foundation)|
I guess most of you will remember my previous comments about the critical role of the liver (and its health or disease) in the development of the metabolic syndrome (read it up). It is thus by no means irrelevant, whether the chronic ingestion of a certain type of oil will result in MDA levels of 92µmol/g or 27.3µmol/g.
Boring!? No, rather surprising!
If you think this sounds boring and are by no means surprised that the malondialdehyde levels of the liver samples the researchers harvested after 4 weeks were 27.3µmol/g, 92µmol/g, 54µmol/g, 47.4µmol/g and 72.6µmol/g for the control diet with mixed fats, red palm oloein (RPO), regular palm oil (PO), corn oil (CO) and the previously celebrated coconut oil (COC), respectively, I would suggest you have a closer look at the the "magic" that happened over the following 4 weeks of on 15% RPO, PO, CO and COC diets.
|Figure 1: MDA levels (µmol/g) of liver tissue as a marker of lipid oxidation after four and eight weeks on control diet or control diet with 15% of red palm olein, palm oil, corn oil or coconout oil (Dauqan. 2013)|
Short term detriments, long term benefits!
I know it sounds more than awkward, but eventually every SuppVersity student should be aware of the fact that the extrapolation of long-term effects from short-term data is a 'risky' business. Unfortunately, even 'experts' often disregard this fundamental rule, when they formulate their recommendations on nutrition, supplementation and exercise.
|Table 1: Carotenoid and vitamin E composition (in %) of crude palm oil and red palm olein; the data is from a different study by Bonni & Choo who tested commercially available products (Bonni. 2000)|
- Bonnie, T. Y. P., & Choo, Y. M. (2000). Valuable minor constituents of commercial red palm olein: carotenoids, vitamin E, ubiquinones and sterols. Journal of Oil Palm Research, 12(1), 14-24.
- Dauqan, E., Abdullah, A., & Sani, H. A. (2013). LIPID PEROXIDATION IN RAT LIVER USING DIFFERENT VEGETABLE OILS. Malaysian Journal of Analytical Sciences, 17(1), 300-309.
- Valls, V., Goicoechea, M., Muniz, P., Saez, G. T., & Cabo, J. R. (2003). Effect of corn oil and vitamin E on the oxidative status of adipose tissues and liver in rat. Food Chemistry, 81(2), 281-286.