We are told to avoid saturated fats, mainly because they have appeared, from empirical evidence, to be more likely to raise LDL levels than unsaturated fats. Yet these fats are less susceptible to oxidation, and this may be why they show up in LDL -- because they are of higher quality and therefore should preferentially be delivered to the tissues for functional roles rather than as fuel (i.e., free fatty acids). Coconut oil, a saturated fat, has been shown to benefit Alzheimer's patients [42]. And high-fat dairy (also highly saturated) has been shown to be beneficial both to fertility among women [10] and, remarkably, to heart disease [37][22].
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