Is it true that antioxidents may provide similar protection to cancer cells as they do to healthy cells.

Forgive my frankness: During my forty years in medicine, almost every serious study of the effects of antioxidants (food, pills) to protect from this-or-that or improve quality / length of life has showed either no effect or negative impact. The actual effect of these substances on cells, in people rather than petri dishes, seems negligible -- which I'd expect. Get with an evidence-based holist for more guidance.

Theoretically, yes: Interesting question, theoretically, I would say yes. Antioxidants are a very broad category of compounds so it may be hard to make a blanket statement, but keep in mind that they are just compounds. Their molecular structure dictates how they react and function and wouldn't discriminate between cancer vs non-cancerous cells. Hope this helps