Due to its constituent...

Laetrile {Amygdalin, B17, Laevomandelonitrile}.

Apricot Oil and its Kernels go through various regimens of legality and edible use in US and other places. Like Almonds there are Sweet and Bitter nuts, therefore Oil from Sweet Kernels is safer internally

TOO much can have problems as the Cyanidic compound is a Blood Thinner, and can also weaken the capillariy walls.

You are probably better off eating just a few kernels a day, at least internally.