In this episode of 'Chemistry for Your Life,' hosts Melissa and Jam delve into the role of vitamin C in the immune system and examine whether taking mega doses of the vitamin can help with common colds. Melissa, a seasoned chemist, explains the chemistry behind oxidation, reduction, and free radicals, and how vitamin C's properties make it crucial for immune function. The discussion also covers historical context, including Linus Pauling's theories, and recent scientific findings on vitamin C's effectiveness. Throughout the episode, Melissa and Jam use analogies and discuss various studies while also previewing future episodes on vitamin C's other benefits and common questions.