Recommended Dietary Allowances 10th Edition (1989) / Chapter Skim
Currently Skimming:
Lipids
Lipids
Pages 44-51
The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.
From page 44... ...
. The polyunsaturated fatty acids are subdivided into those whose first double bond occurs either three carbon atoms from the methyl carbon (n-3 or m-3)
|
From page 45... ...
. The major polyunsaturated fatty acids in plant foods are linoleic acid, an n-6 fatty acid with 18 carbons and two double bonds, and linolenic acid, an n-3 fatty acid with 18 carbons and 3 double bonds.
|
From page 46... ...
diet; mayonnaise, salad dressings, and margarine were the chief sources of linoleic acid; and eggs supplied the most cholesterol (Block et al., 1985~. Food supply disappearance data suggest that per capita consumption of fat in the United States has increased since the late 1970s.
|
From page 47... ...
Thus, arachidonic acid is also considered an essential fatty acid, but only when linoleic acid deficiency exists. The third fatty acid traditionally classified as essential is the n-3 polyunsaturated fatty acid, cx-linolenic acid.
|
From page 48... ...
The Committee on Diet and Health of the Food and Nutrition Board recently recommended that the average population intake of n-6 polyunsaturated fatty acids remain at the current level of about 7% of calories and that individual intakes not exceed 10% of calories because of lack of information about the long-term consequences of a higher intake (NRC, 1989~. For many reasons, especially because essential fatty acid deficiency has been observed exclusively in patients with medical problems affecting fat intake or absorption, the subcommittee has not established an RDA for n-3 or n-6 polyunsaturated fatty acids.
|
From page 49... ...
The strongest dietary determinant of blood cholesterol level is the saturated fatty acid content (NRC, 1989~. The cholesterol content of the diet has an appreciable, but usually lesser influence.
|
From page 50... ...
1982. Essential fatty acid deficiency after hepatic portoenterostomy for biliary atresia.
|
From page 51... ...
1975. Essential fatty acid deficiency in four adult patients during total parenteral nutrition.
|
Key Terms
This material may be derived from roughly machine-read images, and so is provided only to facilitate research.
More
information on Chapter Skim is available.