Over the last two years, there’s been a rise in “immune-boosting” foods, supplements and trends. Today's guest, immunologist Dr. Jenna Macciochi, believes the immune system doesn’t need boosting. Instead, it should be balanced. In this episode, Jenna - a Senior Lecturer in Immunology at the University of Sussex - reveals how your immune system is your body’s housekeeper. Jenna highlights the case for the ‘good bugs’ in our gut microbiome, the role of micronutrients and how our immune system isn’t born, but made. We'll also tackle the age-old question: do we really need Vitamin C supplements? 🥑 Make smarter food choices. Become a member at zoe.com - 10% off with code PODCAST 🌱 Try our new plant based wholefood supplement - Daily 30+ *Naturally high in copper which contributes to normal energy yielding metabolism and the normal function of the immune system Follow ZOE on Instagram Timecodes: 01:21 Quickfire questions 04:51 What is the immune system? 06:49 How your immune system works 09:35 What are natural killer cells? 14:18 Is your immune system inherited? 16:42 The impact of sleep and stress  19:53 Cancer and immunotherapy 28:23 This can trigger inflammation 30:25 Are vitamin C supplements worth it? 31:30 Foods to empower your immune system 40:10 How inflammation affects your brain 44:10 New science of the impact of stress 48:52 Immunity and your body clock 📚 Get Jenna's book Your Blueprint for Strong Immunity 📚 Books by our ZOE Scientists: The Food For Life Cookbook Every Body Should Know This by Dr Federica Amati Food For Life by Prof. Tim Spector Mentioned in today’s episode: “Immune Boosting” in the time of COVID: selling immunity on Instagram (2020), published in Allergy, Asthma & Clinical Immunology Vitamin C for preventing and treating the common cold (2013), published in Cochrane Database of Systematic Reviews Effects of stress on immune function: the good, the bad, and the beautiful (2014), published in Journal of Immunology Research Have feedback or a topic you'd like us to cover? Let us know here. Episode transcripts are available here.