From Real Age:
Phenolic compounds are antioxidants that have a reputation for quelling inflammatory processes that can open the door to diseases like cancer and heart
disease. Peanuts are already packed with a wide variety of antioxidants.
And with the exception of vitamin E, the capacity of peanut antioxidants increased dramatically in a study when the nuts were roasted at about 330 degrees Fahrenheit for 21 minutes.
(Here’s another culinary trick that powers up your peanuts.)