Trans Fatty acid intake in 1990 by Japanese was estimated as 1.8g/capita/day. Considering actual fat and oil intake to be less than supply and that trans fatty acid content had previously been determined by the IR method, the GLC method was used to estimate trans fatty acid content in hydrogenated oils produced in 1998 and also trans fatty acid intake from milk, dairy products, meat and edible vegetable oils.1) The amount of trans fatty acid intake, based on consumption data of hydrogenated vegetable and animal oil, was 0.83g and 0.52g, respectively, a total was 1.35g. Based on differences in fat and oil intake (59.3g) and consumption (87.8g), actual intake of trans fatty acid was found to be 0.91g.2) Approximately 0.65g trans fatty acid was from milk, dairy products, beef and refined edible oils. Total trans fatty acid intake of Japanese was thus determined as 1.56g/capita/day.
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Okamoto et al. (1999) studied this question.