How healthy is sunflower oil, and does it deserve a spot in your pantry? Here's everything you need to know to make an informed choice. 🌻
Potential downsides of sunflower oil.There is a lot of nuance with sunflower oil—"depending on how it's processed and its fatty acid profile, it can be extremely unhealthy and contribute to significant," says Shanahan. As mentioned above, you really want to avoid refined sunflower oil varieties that are also high in linoleic acid, an omega-6 PUFA that is quite unstable.
There's nothing inherently wrong with omega-6 PUFAs, but the damage that occurs to these fats when exposed to high temperatures during refining, and then again during cooking, can be a problem."When these unstable PUFAs encounter the high heat, they oxidize and break down chemically to produce dangerous new molecules such as aldehydes, 4-hydroxynonenal, cyclic amines, toxic alcohols, and toxic ketones," says Shanahan.
But if heating high-PUFA oils like sunflower oil can create a rather undesirable cocktail of compounds, you may be wondering why it's marketed as having a high smoke point. Contrary to popular belief, an oil's smoke point doesn't always guarantee stability under heat. In fact, various studies show that after repeated frying sessions, a higher level of harmful byproducts are produced in high-linoleic oils such as sunflower oil than in high-oleic oils such as olive oil .
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