Mangiferin is found in many plant species, among which the mango tree (Mangifera indica) is one of the primary sources.
Mangiferin is present in significant levels in different parts of the mango fruit (peel, pulp, and seed kernel).

Mangiferin is amongst the polyphenols; polyphenols are plant compounds that function as antioxidants. Antioxidants are important as they protect your cells against free radical damage (free radicals are highly reactive compounds that can bind to and damage your cells).
Mangiferin is a “super antioxidant” since it’s especially powerful, because it has potent antioxidant activity and multifactorial pharmacological effects – including antidiabetic, antitumor, lipometabolism regulating, cardioprotective, anti-hyperuricemic, neuroprotective, antioxidant, anti-inflammatory, antipyretic, analgesic, antibacterial, antiviral and immunomodulatory effects; therefore mangiferin possesses several health-endorsing properties.
(Source of Information: spandidos-publications.com)