Walnut kernels are non-toxic, but the green skin is toxic. Green walnut skin is poisonous, because it is not ripe, the inside of the peach kernel is not so oily, easy to deteriorate, dry and not full. Tree ripe walnuts high nutrition, high oil, green skin natural peeling, peach kernel full, good taste, easy to save. The juice of green walnuts is toxic, must avoid direct contact with the juice of green walnuts. Green walnuts can also not be eaten directly, must be peeled first. In the process of peeling, do not let the juice of green walnuts splashed on the other skin, or it will ulcerate, because the green walnut is also known as the "green dragon coat", its juice is highly toxic. Do not splash in the eyes.