Chris Masterjohn of the Weston A. Price Foundation argues that a low-fat diet will only provide benefits insofar as it's also low in PUFAs. The carbs will be converted to saturated fatty acids, making low-fat a high-SFA diet too.
"...when [SFA] intake was analyzed as a continuous variable, each [5%] of calories from [SFA] produced a 0.16-millimeter lessening of atherosclerotic progression. The effect changed from a slowing of progression to a reversal at about [13%] of calories from [SFA]...
"Additionally, every [5%] increase in the percentage of calories from [PUFA] was associated with a 0.17-millimeter worsening of atherosclerotic progression."
http://www.cholesterol-and-health.com/Campbell-Masterjohn.html#context
So, the evidence is clear. Low-fat diets are only beneficial in that they are low in PUFAs and the carbs are converted into saturated fat, making low-fat diets high-SFA and low-PUFA, by default. Saturated fatty acids reverse atherosclerosis and PUFAs cause it to progress. So, lard may be very bad, while beef fat or butter or coconut oil won't be. |
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