The Late Night Gourmet
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Here's an excellent article that examines that very question. And, here's a summary of what that article has to say on the topic:
- There is a significant health difference between partially hydrogenated coconut oil and virgin coconut oil, which has not been chemically treated. The partially hydrogenated coconut oil contains trans fat.
- Coconut oil that is not partially hydrogenated, however, is still one of the most concentrated food sources of saturated fat (more so than butter, beef fat, or lard). Coconut oil is about 90% saturated fat. Butter is about 64% saturated fat, and beef fat and lard are about 40%, and olive oil sits at 14%
- Yet there is evidence to suggest that the distinct composition of coconut oil makes it less detrimental—and maybe even neutral or beneficial—for heart health as compared to other saturated fat sources. The net effect of coconut oil depends on what it is replacing (if anything) in the diet.
- But even the benefits of HDL—the "good" cholesterol boosted by coconut oil—are not entirely clear.
- The moral of the story? We don't know very much about coconut oil and heart health. Evidence of an association between coconut consumption and risk factors for heart disease is mostly of very poor quality
- Evidence that coconut oil can lead to significant weight loss is not likely to have significant real world application. Marie-Pierre St-Onge has a study that showed a link between coconut oil and metabolic rate. But, in order for the results of her studies to have any real world application, people would have to consume a ton of high-calorie coconut oil, thereby offsetting any metabolism-revving weight loss benefits.
- Coconut oil is a source of antioxidants—but so are foods that don't contain nearly as much saturated fat.
- Lauric acid, which makes about about half of the fatty acids in coconut oil, has strong antimicrobial properties, but how that plays out within the human body is less known.
- There is no clinical evidence that coconut oil can treat Alzheimer's (though anecdotal evidence and theoretical research does exist).