1, taste: the taste of cold pressed linseed oil is "raw oil taste", and the taste of refined linseed oil is "fishy smell";

2, color:

A, the color is light yellow like salad oil (actually: flax salad oil);

B, the color is light red, the sense is beautiful, and the taste is not oily. This kind of oil is incomplete in refining and decoloration. (Actually, it is substandard flax salad oil.) The linolenic acid in these two kinds of flax seed oils has been excessively high and has undergone a series of chemical reactions. The linolenic acid has no activity, the absorption and transformation effect of linolenic acid is poor, and the therapeutic effect is not obvious.