http://openheart.bmj.com/content/1/1/e000032.full
Fazit des Artikels im BMJ-Journal Open Heart (eine der angesehensten wissenchaftlichen Quellen!):
Dietary guideline recommendations suggesting the replacement of saturated fat with carbohydrates/Ω-6 polyunsaturated fats do not reflect the current evidence in the literature.
A change in these recommendations is drastically needed as public health could be at risk.
The increase in the prevalence of diabetes and obesity in the USA occurred with an increase in the consumption of carbohydrate not saturated fat.
There is no conclusive proof that a low-fat diet has any positive effects on health. Indeed, the literature indicates a general lack of any effect (good or bad) from a reduction in fat intake.
The public fear that saturated fat raises cholesterol is completely unfounded as the low-density lipoprotein particle size distribution is worsened when fat is replaced with carbohydrate.
A public health campaign is drastically needed to educate on the harms of a diet high in carbohydrate/sugar.
It would be naive to assume that any recommendations related to carbohydrate or fat intake would apply to processed foods, which undoubtedly should be avoided if possible.