Antioxidants are generally not harmful unless taken in mega-doses, and small amounts are necessary for immune function and mitochondrial health (mitohormesis).

“Well, yeah, antioxidants are not going to hurt you unless you take mega doses. We do need some oxidants for our immune system. And there's even, what's called mitohormesis, which is your mitochondria power packs, need to have a little bit of these free radicals to be able to function.”