Monounsaturated fatty acids, or MUFAs, are a prime reason why olives are revered for their health benefits. Olive oil is an example of a plant-derived source of fat that's very rich in MUFAs, at around 75 percent. It's a good source of omega-9s, particularly oleic acid (also found in macadamia nuts), which helps lower LDL cholesterol.
Technically speaking, olives are a fruit. And the amount of MUFAs doesn't vary much among the three main grades of olive oil: extra-virgin olive oil, virgin olive oil, and olive oil. But there are very significant differences among them. Extra-virgin olive oil is considered the highest grade, and the lowest grade is simply called olive oil, which is in principle a seed oil, since it's derived from the olive pit.
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Only extra-virgin olive oil is derived purely from the flesh of the olive without using any chemicals or heat. Because of that, when a bottle is labeled "virgin" or "olive oil," you are to avoid it. Another thing that differs significantly among the grades of olive oil is the amount of phytonutrients from the 230 different compounds that have been identified. These include phenolic compounds, triterpenes, and phytosterols. These phytonutrients are actually found in much higher concentrations within higher grades of olive oil and can lower elevated inflammatory markers that I mentioned earlier (IL-1B and IL-6), which is obviously very good for your genes and overall health.
But the level of phytonutrients can also vary among varieties of olives, where they're grown, and even between seasons from the exact same farm. As olive oil is increasingly processed, the quality of the oil itself decreases along with degrading the important phytonutrients it once contained.
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To increase the amount of phytonutrients that reverse genetic aging for the same amount of energy or calories, go for only the best-quality extra-virgin olive oil. It's important to always store all of your oils away from extraneous light and air, so opt for opaque bottles that seal well to make sure your oil doesn't oxidize or become rancid, losing many of its health properties. And remember, paying more for a genetically healthful product is an investment in your genetic health for decades to come. It's so worth it.
MUFAs are also found in other foods such as certain nuts, as well as avocados and certain seed oils.