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Sun, 27 Jan 2002 06:47:53 -0500 |
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Hi Keith;
>1. Does the USDA data base report on n-3 and n-6 fats?
http://www.nal.usda.gov/fnic/cgi-bin/nut_search.pl
1 oz (14 halves) = 28.350 grams
Fatty acids, total polyunsaturated g 13.374
18:2 undifferentiated g 10.799
18:3 undifferentiated g 2.574
18:4 g 0.000
20:2 n-6 c,c g 0.000
20:3 undifferentiated g 0.000
20:4 undifferentiated g 0.000
20:5 n-3 g 0.000
22:5 n-3 g 0.000
22:6 n-3 g 0.000
1 oz (6-8 kernels) = 28.350 grams
Fatty acids, total monounsaturated g 6.525
16:1 undifferentiated g 0.092
18:1 undifferentiated g 6.345
20:1 g 0.018
22:1 undifferentiated g 0.000
Fatty acids, total polyunsaturated g 6.841
18:2 undifferentiated g 6.749
18:3 undifferentiated g 0.018
18:4 g 0.000
20:4 undifferentiated g 0.000
20:5 n-3 g 0.000
22:5 n-3 g 0.000
22:6 n-3 g 0.000
>2. If it does, how do I derive that ratio from its analyses?
From http://www.fish-foundation.org.uk/omega-3.htm this appears to be helpful;
THE OMEGA-6 POLYUNSATURATES
LINOLEIC ACID(18:2,W-6)
from vegetable oils such as sunflower, sesame, safflower etc
GAMMA-LINOLENIC ACID(18:3,W-6)
from evening primrose oil, borage and blackcurrantseed oils
ALPHA-LINOLENIC ACID (18:3,W-3)
( a short chain omega-3)
from linseed and rapeseed oils
ARACHIDONIC ACID (20:4,W-6)
found in small amounts in meat, eggs
EICOSAPENTAENOIC ACID (20:5, W-3)
( a long chain omega-3)
only significant diet source is oil-rich fish
DOCOSAHEXAENOIC ACID (22:6,W-3)
(a long chain omega-3)
major source is oil-rich fish; small amounts in meats & eggs.
Marilyn
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