The removal of the skin tip of bitter almonds is a traditional concoction. Since ancient times, the tip of the skin has been considered toxic. Now research has proved that the skin does not contain amygdalin, the tip of the kernel has not been detected with other components of the kernel, but the content of amygdalin is slightly higher than the whole almond.

Bitter almonds contain the chemical composition of bitter amygdalin containing toxins (hydrocyanic acid decomposed by the bitter amygdalin), medical adults, the amount of bitter almonds for 10 to 15 grams, which is not poisonous, but a large number of doses (more than 50 grams) to take the bitter almonds will be poisoned.

Bitter almonds contain more than 80% of the toxin distribution in the tip of the skin. Removing the tip of the skin is to remove the toxin, so as to prevent poisoning.