World’s most efficient known free radical scavenger is C60 fullerene. 

C60

• C60 fullerenes possess large amount of conjugated double bonds and low lying lowest unoccupied molecular orbital which can easily take up an electron from an attack of an oxygen radical.

• The fullerene can react with many superoxides without being consumed.

• C60 fullerene derivatives are rapidly absorbed by tissues and excreted through urinary tract; low to no toxicity in vitro and in vivo in studies.

• Potentially therapeutic against arthritic pain, cancer, human immunodeficiency virus (HIV), and neurodegenerative disorders like Dementia, Parkinson’s and Alzheimer’s from performed research.