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This report deals with monthly investigation of vitamin A in 15 kinds of enriched household margarine (of which 13 are of JAS and the rest of quasi-JAS) kept at room temperature for 12 months, and at the same time, of the correlation with P.O.V. Vitamin A of samples showed 36,900 I.U./450g at maximum, 18,200 at minimum and 26,370 on average, well above the level of European and American standard margarine. The average remaining % of vitamin A was 84.4 after 3 months, 76.3 after 6, 71.6 after 9doi:10.5650/jos1956.10.179 fatcat:rosx7sbmenfb3dif7jn2zlkg3i