Here's a relevant abstract, which contradicts "mainstream advice:"
J Nutr. 2003 Jan;133(1):78-83.
"The serum LDL/HDL cholesterol ratio is influenced more favorably by
exchanging saturated with unsaturated fat than by reducing saturated
fat in the diet of women."
Müller H, Lindman AS, Brantsaeter AL, Pedersen JI.
University College of Akershus, Bekkestua, Norway.
We compared the effects of a high fat diet [38.4% of energy (E%) from
fat; HSAFA diet, polyunsaturated/saturated fatty acid (P/S) ratio =
0.14], a low fat diet (19.7 E% from fat; LSAFA diet, P/S = 0.17), both
based on coconut oil, and a diet with a high content of mono- and
polyunsaturated fatty acids (PUFA; 38.2 E% from fat; HUFA diet, P/S =
1.9) on serum lipoproteins. The 25 women studied consumed each diet
for 3-wk periods in a crossover design. The two high fat diets were
identical except for the quality of the test fat. The LSAFA diet was
identical to the HSAFA diet except that half the fat was replaced by
carbohydrates. Serum total cholesterol, LDL cholesterol and apoB
concentrations did not differ between the HSAFA and the LSAFA diet
periods. Total cholesterol, LDL cholesterol and apoB were lower when
women consumed the HUFA diet than when they consumed the other two
diets. HDL cholesterol and apoA-I were 15 and 11%, respectively,
higher when women consumed the HSAFA diet than when they consumed the
LSAFA diet; HDL cholesterol and apoA-I were lower when women consumed
the HUFA diet than when they consumed the HSAFA diet, but not the
LSAFA diet. The LDL cholesterol/HDL cholesterol and apoB/apoA-I ratios
were higher when women consumed the LSAFA diet than when they consumed
the HSAFA diet. The LDL/HDL cholesterol ratio was higher when women
consumed either the LSAFA or the HSAFA diet than when they consumed
the HUFA diet, whereas apoB/apoA-I was higher when women consumed the
LSAFA diet than when they consumed the HUFA diet. Triacylglycerol and
VLDL cholesterol were higher when women consumed the LSAFA diet than
when they consumed either the HSAFA or the HUFA diet. We conclude
that, to influence the LDL/HDL cholesterol ratio, changing the
proportions of dietary fatty acids may be more important than
restricting the percentage of total or saturated fat energy, at least
when derived mainly from lauric and myristic acids, both of which
increase HDL cholesterol. |
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