Source
Mangoes are grown with poisonous spices
FSSAI (Ref.) According to, calcium carbide is used for artificial ripening of mangoes. which release acetylene gas and this gas ripens the mango. Calcium carbide is also known as ‘Masala’. Apart from mango, this chemical is also used to grow banana, papaya etc.
Why are mangoes grown with chemicals?

Mangoes are chemically ripened to increase supply in less time and cost and to stay fresh longer. It changes the color, shape and taste of the mango. At a glance, artificially grown mangoes look natural. But they can be severely deficient in nutrients and cause side effects.
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New mango recipe
Identification of chemically grown mangoes

According to FSSAI, avoid buying mangoes with black spots. Because it can be cooked with acetylene gas which is obtained from calcium carbide. Before eating any fruit, wash it well under running water.
Note: This article is for general information only and no medical treatment is claimed. Always consult your doctor for more information and make appropriate changes as per his advice.