"1) Being able to control diabetes
Spleen leaves are very useful for diabetes. Anthocyanidins can treat diabetes at the onset.

2) Ability to control blood pressure
Spleen can help lower blood pressure. It can relax blood vessels and control blood pressure.

3) Relieve anxiety
It is said that the spleen relieves stress caused by anxiety. It is said to refresh the body and mind by soaking in the bath tub.

4) Being able to treat gallstones
Spleen contains substances that can treat gallstones and kidney stones. It is said that by thoroughly cleaning the spleen, drying it into a powder, and drinking it with water every day, it breaks down gallstones and kidney stones.

5) Being able to treat respiratory problems
It is said that by boiling the spleen leaves and drinking the spleen decoction with a teaspoon of honey, it relieves cough. Reduces noise.

6) Relief from sunburn
It is said to relieve sunburn by crushing spleen leaves and rubbing them on the sunburned area. It is said to make the skin smooth and soothing.
Translated from the link https://food.ndtv.com/food-drinks/10-unknown-benefits-of-mango-leaves-dont-throw-them-away-1657768.