The efficacy and functions of walnut peel are as follows:

1. Mainly for medicinal purposes, it has good therapeutic effects in softening blood vessels, anti-cancer, etc. Green walnut peel also has It has the functions of clearing heat, detoxifying, diuresis, removing dampness and heat, reducing swelling, killing insects and relieving itching.

2. The hard skin sandwiched in the middle of walnuts is used to soak in water to drink, which mainly promotes blood circulation and unblocks collaterals.