What is the yellow thing on mangosteen? What is the yellow thing on mangosteen?

1, the yellow spots on the mangosteen surface are left by the yellow milk flowing out of mangosteen fruit trees after air drying, commonly known as mangosteen gum.

2. The exocarp of Mangosteen contains a series of astringent polyphenols, including xanthone and tannic acid, which can ensure that the fruit is not harmed by insects, fungi, plant viruses, bacteria and animals when it is immature.