Fatty acid ratio in food explained

Only two essential fatty acids are known to be essential for humans: alpha-linolenic acid (an omega-3 fatty acid) and linoleic acid (an omega-6 fatty acid).[1] The biological effects of the ω-3 and ω-6 fatty acids are mediated by their mutual interactions. Closely related, these fatty acids act as competing substrates for the same enzymes. The biological effects of the ω-3 and ω-6 fatty acids are largely mediated by essential fatty acid interactions. The proportion of omega-3 to omega-6 fatty acids in a diet may have metabolic consequences.[2] Unlike omega-3 fatty acids and omega-6 fatty acids, omega-9 fatty acids are not classed as essential fatty acids because they can be created by the human body from monounsaturated and saturated fatty acids, and are therefore not essential in the diet.

Ratio of omega-6 to omega-3 fats in the diets of hunter-gatherers

It has been claimed that among hunter-gatherer populations, omega-6 fats and omega-3 fats are typically consumed in roughly a 1:1 ratio.[3] [4] At one extreme of the spectrum of hunter-gatherer diets, the Greenland Inuit, prior to the late Twentieth Century, consumed a diet in which omega-6s and omega-3s were consumed in a 1:2 ratio, thanks to a diet rich in cold-water fish (which are a rich source of omega-3s) and completely devoid of omega-6-rich seed oils.[5]

Optimal ratio of omega-6 to omega-3 fats

To date, "no one knows what the optimal ratio in the diet is for these two families of fats."[6] Science writer Susan Allport writes that the current ratio in Japan is associated with a very low incidence of heart and other diseases. A dietary ratio of 4:1 produces almost a 1:1 ratio of highly unsaturated fatty acids (HUFAs) in cell membranes."[6]

In a study with rats, a dietary ratio of 4:1 showed significant favorable effects on learning performance and pain tolerance compared to 6:1.[7]

Andrew Stoll, M.D., Director of the Psycho-pharmacology Research Laboratory at Harvard's McLean Hospital, who advocates the consumption of the two fats in a 1:1 ratio, states, "Once in the body, omega-3 and omega-6 fatty acids follow parallel pathways, continually competing with each other for chemical conversion to various structures and molecules inside and outside the cells. Given this mechanism, it makes sense that the two fats might be required in approximately equal amounts."[8]

Both Stoll and Allport assert that present-day diets in the developed world have departed dramatically from this ratio. It has been estimated that in developed countries, the ratio of omega-6s to omega-3s is closer to 15:1[9] Another estimate is that "[t]he diet consumed by the typical American tends to contain 14–25 times more omega-6 fatty acids than omega-3 fatty acids."[10]

According to a 2009 review by the American Heart Association, instead of avoiding ω-6 fats, the ω-6:ω-3 ratio should be decreased by consuming more ω-3 fats. The conversion rate of linoleic acid (LA) into arachidonic acid is very low with a diet high in linolenic acid.[11]

The maximum ω-6:ω-3 ratio allowed in dog food by the AAFCO is 30:1.[12]

Fish

width=30% Food !width=10% Citation !width=9% Serving size (g) !width=9% Omega-6 fatty acids (mg)!width=9% Omega-3 fatty acids (mg)!width=25% ! data-sort-type="number" Omega-6 : omega-3 ratio
Salmon, wild, raw[13] 10017220181 : 11
Sardines, canned in oil[14] 1 can
(90 g)		326013622 : 1
Sardines, canned in water[15] 1 can
(90 g)		65514571 : 2
Tuna, canned in water[16] 1 can
(160 g)		144601 : 31
Tuna, canned in oil[17] 1 can
(170 g)		458834513 : 1
Mackerel, canned[18] 1 can
(360 g)		35749701 : 13
Herring[19] 100 g24624181 : 10

Nuts and seeds

width=30% Food !width=10% Citation !width=9% Serving size (g) !width=9% ! data-sort-type="number" Omega-6 (mg)!width=9% ! data-sort-type="number" Omega-3 (mg)!width=25% ! data-sort-type="number"Omega-6 : omega-3 ratio
Almonds, dry roasted[20] 1001206562010 : 1
Cashews[21] 100778262125 : 1
Chia seeds[22] 1005785175521 : 3
Coconut, raw[23] 100366--
Flax seeds[24] 1005911228131 : 4
Hazelnuts, filberts[25] 10078328790 : 1
Hemp seeds[26] 10056000220003 : 1
Macadamia nuts, dry roasted[27] 10017202596 : 1
Pecans[28] 1002063098621 : 1
Pistachios, raw[29] 1001320025452 : 1
Poppy seed[30] 10028291273103 : 1
Pumpkin seeds, whole, roasted[31] 100875977114 : 1
Sesame seeds, whole, dried[32] 1002137237657 : 1
Sunflower seeds, kernels, dried[33] 1002304874311 : 1
Walnuts[34] 1003809290794 : 1
Lentils, mature seeds, cooked, boiled, without salt[35] 100137374 : 1

See also

Notes and References

  1. Book: Whitney Ellie . Rolfes SR . Understanding Nutrition . 11th . California . Thomson Wadsworth . 2008 . 154.
  2. Bibus. Doug. Lands. Bill. Balancing proportions of competing omega-3 and omega-6 highly unsaturated fatty acids (HUFA) in tissue lipids. 10.1016/j.plefa.2015.04.005. April 18, 2015. 26002802. 99. Prostaglandins Leukot. Essent. Fatty Acids. 19–23. free.
  3. Andrew Stoll, The Omega-3 Connection. New York: Simon and Schuster, 2001, p. 43. "Populations maintaining historic omega-6 to omega-3 ratios (approximately 1 to 1) are protected from many of the scourges of the modern age."
  4. Simopoulos . Artemis P. . 2010-09-01 . The omega-6/omega-3 fatty acid ratio: health implications . Oléagineux, Corps gras, Lipides . en . 17 . 5 . 267–275 . 10.1051/ocl.2010.0325 . 1258-8210. free .
  5. William Lands, Fish, Omega-3 and Human Health. Urbana, Illinois: APCS Press, 2005, p. 10.
  6. Susan Allport, The Queen of Fats: Why Omega-3 Fats Were Removed From the Western Diet and What We Can Do to Replace Them. Berkeley: University of California Press, 2007, p. 115.
  7. Modulation of learning, pain thresholds, and thermoregulation in the rat by preparations of free purified alpha-linolenic and linoleic acids: determination of the optimal omega 3-to-omega 6 ratio. . 1993-11-01 . 47771 . Yehuda . S. . Carasso . R. L. . Proceedings of the National Academy of Sciences of the United States of America . 90 . 21 . 10345–10349 . 10.1073/pnas.90.21.10345 . 7901853 . 1993PNAS...9010345Y . free .
  8. Andrew Stoll, The Omega-3 Connection. New York: Simon and Schuster, 2001, p. 40.
  9. 12442909 . 2002 . Simopoulos . AP . The importance of the ratio of omega-6/omega-3 essential fatty acids . 56 . 8 . 365–79 . Biomedicine & Pharmacotherapy . 10.1016/S0753-3322(02)00253-6.
  10. http://umm.edu/health/medical/altmed/supplement/omega6-fatty-acids
  11. Harris . WS . Mozaffarian . D . Rimm . E . Kris-Etherton . P . Rudel . LL . Appel . LJ . Engler . MM . Engler . MB . Sacks . F . Omega-6 fatty acids and risk for cardiovascular disease: a science advisory from the American Heart Association Nutrition Subcommittee of the Council on Nutrition, Physical Activity, and Metabolism; Council on Cardiovascular Nursing; and Council on Epidemiology and Prevention. . Circulation . 17 February 2009 . 119 . 6 . 902–7 . 10.1161/CIRCULATIONAHA.108.191627 . 19171857. free .
  12. Web site: 2013. AAFCO methods for substantiating nutritional adequacy of dog and cat foods (proposed for 2014 publication). AAFCO. 2020-12-01. 2020-10-22. https://web.archive.org/web/20201022110300/https://www.aafco.org/Portals/0/SiteContent/Regulatory/Committees/Pet-Food/Reports/Pet_Food_Report_2013_Midyear-Proposed_Revisions_to_AAFCO_Nutrient_Profiles.pdf. dead.
  13. Web site: Fish, salmon, Atlantic, wild, raw Nutrition Facts & Calories . 2019-02-15 . Self Nutrition Data, Condé Nast . https://web.archive.org/web/20181212060442/https://nutritiondata.self.com/facts/finfish-and-shellfish-products/4102/2 . 2018-12-12 .
  14. Web site: Fish, sardine, Atlantic, canned in oil, drained solids with bone Nutrition Facts & Calories . 2019-02-15 . Self Nutrition Data, Condé Nast . https://web.archive.org/web/20180703091645/http://nutritiondata.self.com/facts/finfish-and-shellfish-products/4114/2 . 2018-07-03 .
  15. Web site: Fish, sardine, Atlantic, canned in oil, drained solids with bone Nutrition Facts & Calories . 2019-02-15 . Self Nutrition Data, Condé Nast . https://web.archive.org/web/20180703091645/http://nutritiondata.self.com/facts/finfish-and-shellfish-products/4114/2 . 2018-07-03 .
  16. Web site: Fish, tuna, light, canned in water, without salt, drained solids Nutrition Facts & Calories . 2019-02-15 . Self Nutrition Data, Condé Nast . https://web.archive.org/web/20180707030258/http://nutritiondata.self.com/facts/finfish-and-shellfish-products/4206/2 . 2018-07-07 .
  17. Web site: Fish, tuna, light, canned in oil, without salt, drained solids Nutrition Facts & Calories . 2019-02-15 . Self Nutrition Data, Condé Nast . https://web.archive.org/web/20180626065817/http://nutritiondata.self.com/facts/finfish-and-shellfish-products/4205/2 . 2018-06-26 .
  18. Web site: Fish, mackerel, jack, canned, drained solids . 2019-02-15 . Self Nutrition Data, Condé Nast . https://web.archive.org/web/20180626093621/http://nutritiondata.self.com/facts/finfish-and-shellfish-products/4074/2 . 2018-06-26 .
  19. Web site: Fish, herring, Pacific, cooked, dry heat Nutrition Facts & Calories . 2019-02-15 . Self Nutrition Data, Condé Nast . https://web.archive.org/web/20180612054223/http://nutritiondata.self.com/facts/finfish-and-shellfish-products/4219/2 . 2018-06-12 .
  20. Web site: Nuts, almonds [Includes USDA commodity food A256, A264] Nutrition Facts & Calories ]. Self Nutrition Data, Condé Nast . 2019-02-15 . https://web.archive.org/web/20190114081700/https://nutritiondata.self.com/facts/nut-and-seed-products/3085/2 . 2019-01-14 .
  21. Web site: Nuts, cashew nuts, raw Nutrition Facts & Calories . Self Nutrition Data, Condé Nast . 2019-02-15 . https://web.archive.org/web/20181009160543/https://nutritiondata.self.com/facts/nut-and-seed-products/3095/2 . 2018-10-09 .
  22. Web site: Seeds, chia seeds, dried Nutrition Facts & Calories . https://web.archive.org/web/20190204155520/https://nutritiondata.self.com/facts/nut-and-seed-products/3061/2 . 2019-02-04 . Self Nutrition Data, Condé Nast . 2019-02-15.
  23. Web site: Nuts, coconut meat, raw Nutrition Facts & Calories . Self Nutrition Data, Condé Nast . 2019-02-15 . https://web.archive.org/web/20190130140230/https://nutritiondata.self.com/facts/nut-and-seed-products/3106/2 . 2019-01-30 .
  24. Web site: Seeds, flaxseed Nutrition Facts & Calories . Self Nutrition Data, Condé Nast . 2019-02-15 . https://web.archive.org/web/20181230032805/https://nutritiondata.self.com/facts/nut-and-seed-products/3163/2 . 2018-12-30 .
  25. Web site: Nuts, hazelnuts or filberts Nutrition Facts & Calories . Self Nutrition Data, Condé Nast . 2019-02-15 . https://web.archive.org/web/20180710102750/http://nutritiondata.self.com/facts/nut-and-seed-products/3116/2 . 2018-07-10 .
  26. The cardiac and haemostatic effects of dietary hempseed . 2010 . . 2868018 . Rodriguez-Leyva . D. . Pierce . G. N. . Nutrition & Metabolism . 7 . 32 . 10.1186/1743-7075-7-32 . 20409317 . free .
  27. Web site: Nuts, macadamia nuts, dry roasted, without salt added Nutrition Facts & Calories . Self Nutrition Data, Condé Nast . 2024-01-11 . https://web.archive.org/web/20180720194453/http://nutritiondata.self.com/facts/nut-and-seed-products/3124/2 . 2018-07-20 .
  28. Web site: Nuts, pecans Nutrition Facts & Calories . Self Nutrition Data, Condé Nast . 2019-02-15 . https://web.archive.org/web/20180620082416/http://nutritiondata.self.com/facts/nut-and-seed-products/3129/2 . 2018-06-20 .
  29. Web site: Nuts, pistachio nuts, raw Nutrition Facts & Calories . Self Nutrition Data, Condé Nast . 2019-02-15 . https://web.archive.org/web/20181009154549/https://nutritiondata.self.com/facts/nut-and-seed-products/3135/2 . 2018-10-09 .
  30. Web site: Spices, poppy seed Nutrition Facts & Calories . Self Nutrition Data, Condé Nast . 2019-02-15 . https://web.archive.org/web/20181130162554/https://nutritiondata.self.com/facts/spices-and-herbs/203/2 . 2018-11-30 .
  31. Web site: Seeds, pumpkin and squash seeds, whole, roasted, without salt Nutrition Facts & Calories . Self Nutrition Data, Condé Nast . 2019-02-15 . https://web.archive.org/web/20181230021336/https://nutritiondata.self.com/facts/nut-and-seed-products/3141/2 . 2018-12-30 .
  32. Web site: Seeds, sesame seeds, whole, dried Nutrition Facts & Calories . Self Nutrition Data, Condé Nast . 2019-02-15 . https://web.archive.org/web/20181126121713/https://nutritiondata.self.com/facts/nut-and-seed-products/3070/2 . 2018-11-26 .
  33. Web site: Seeds, sunflower seed kernels, dried Nutrition Facts & Calories . Self Nutrition Data, Condé Nast . 2019-02-15 . https://web.archive.org/web/20180707024930/http://nutritiondata.self.com/facts/nut-and-seed-products/3076/2 . 2018-07-07 .
  34. Web site: Nuts, walnuts, english (Includes USDA commodity food A259, A257) Nutrition Facts & Calories . Self Nutrition Data, Condé Nast . 2023-02-27.
  35. Web site: Lentils, mature seeds, cooked, boiled, without salt Nutrition Facts & Calories . en-US . 2017-05-01 . Self Nutrition Data, Condé Nast . https://web.archive.org/web/20190114081655/https://nutritiondata.self.com/facts/legumes-and-legume-products/4338/2 . 2019-01-14 .

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