It seems that some producers do not actually measure the nutritional values, but use canonical values. The nutritional values can be presented per 100g or per 100ml.
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The nutritional values of olive oils are more spread out than necessary. Some producers list the values per 100g and other per 100ml. The difference is the specific weight of olive oils (0.92 g/l).
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It seems that some producers do not actually measure the nutritional values, but use canonical (standard) values.