Great. Books are good. Yet, the title of a book does not, however, indicate the source of the dietary recommendation.
The figures of 430-650mg per day in the quote I provided are from various research bodies. If you don't trust the credibility of that particular website in terms of assembling this information (although one would think ω−3 retailers would want to provide the highest recommendations possible to maximize sales), you can take the time to verify them with the original source from which the recommendation stems. Alternatively, I can give you the citations (and pdf files, via email) of the very latest literature reviews on the subject with similar figures:
Lecerf, Jean-Michel. "Fatty acids and cardiovascular disease." Nutrition Reviews 67.5 (May 2009): 273-283.
Webb, Robyn, and Tracey Neithercott.. "The A-to-Z of Omega-3." Diabetes Forecast 62.2 (Feb. 2009): 45-48.
But that's beside the point. Other cultures or our primordial ancestors consuming a given amount of anything whatsoever isn't, in itself, indicative of anything. There is such a thing as too little of ω−3 (ahoy cardiovascular disease), a sufficient amount which meets one's daily requirements, and one that is in excess of what is healthy. The folks that come up with nutritional recommendations at say the Food and Drug Administration or the American Heart Association aren't idiots. They have advanced degrees in medicine, nutritional sciences, biochemistry, etc and would generally be considered experts in the field. In making a recommendation, be it for saturated fats OR ω−3, they generally have some sort of basis for it other than picking a random number. Disregarding them entirely, even if the Inuit do eat more ω−3 (or you saturated fat) than they recommend, is rather silly. Here is an example of the reasoning for not overconsuming ω−3:
http://www.americanheart.org/presenter. ... ifier=4632Patients taking more than 3 grams of omega-3 fatty acids from capsules should do so only under a physician’s care. High intakes could cause excessive bleeding in some people.