Converse of object

• scavenge: Smoking Ginkgo's ability to scavenge free radicals means that it will make a substantial difference to the potential damage smoking may present.

• fight: As plants evolved, they developed antioxidants to fight free radicals, Heber says.

• call: The substances that can exist with missing electrons are called free radicals.

• generate: Vitamin C also has antioxidant properties, defending against damaging free radicals generated during the inflammatory response, sepsis or stress.

• produce: Many normal metabolic functions produce free radicals - highly unstable forms of oxygen, which in excess cause oxidative stress leading to cell damage.

• damage: Vitamin C also has antioxidant properties, defending against damaging free radicals generated during the inflammatory response, sepsis or stress.

Noun used with modifier

• oxygen: The production of these free oxygen radicals only occurs under oxidizing conditions.

Adjective modifier

• harmful: For example, it appears to produce antioxidants in response to harmful free radicals and other poisonous toxins it encounters.

• destructive: This is especially important to those who exercise frequently, as they generate more of these dangerous and destructive free radicals.

• dangerous: Scientists at the University of Ulster have found that unaccustomed, aerobic exercise releases dangerous free radicals.

Preposition: in

• body: This is capable of producing images showing the distribution of free radicals in the body.