An adequate daily intake for adults of alpha-linolenic acid
has been established by the U.S.
The findings suggest that "the association between alpha-linolenic acid
and risk of prostate cancer may not be a reflection of animal fat intake," he said.
By "essential oil," he is referring to the omega-6 linoleic acid and the omega-3 alpha-linolenic acid
. Peskin considers omega-3 supplements containing DHA and EPA "derivatives" of the "parent" omega-3 alpha-linolenic acid
The European Journal of Preventive Cardiologyreports the finding of a lower risk of death from cardiovascular disease among men and women with a higher intake of the omega-3 fatty acids EPA and DHA, which are derived from marine sources, and alpha-linolenic acid
(ALA), which occurs in plant foods.*
While the good news about omega-3s is widespread, what many people don't realize is that there are two major types: the long chain omega-3s eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), found in fish and fish oil; and the short-chain form alpha-linolenic acid
(ALA), found in walnuts, flax, and some vegetable oils.
According to the researchers, walnuts contain alpha-linolenic acid
, gamma-tocopherol and phytosterols, which may explain the positive effects of the walnut oil treatment.
Vegetarians can get alpha-linolenic acid
, another omega-3 fatty acid, from foods including flaxseeds, flaxseed oil, walnuts, and canola oil.
"Long-Chain Conversion of [13C] Linoleic Acid and Alpha-Linolenic Acid
in Response to Marked Changes in their Dietary Intake in Men," J.
Purslance contains more omega-3 fatty acids, alpha-linolenic acid
in particular than any other leafy vegetable plant.
In the Jan/Feb issue of Running & FitNews[R] we discussed how, of all nuts, walnuts have the greatest concentration of omega-3 fatty acids and contain more alpha-linolenic acid
(ALA) in particular than do other nuts.
The lighter moods might have been associated with higher intakes of another omega-3 fatty acid, alpha-linolenic acid
. (Source: Nutrition Journal, 2010; 9:26.)
The link with EPA--the other major omega-3 fat in fish--was weaker, and there was no link with alpha-linolenic acid
, the omega-3 fat that's found in soy, canola, and flax oil.