What Happens to Your Body After 12, 24, and 48 Hours of Fasting

In this video, I explain what really happens inside your body during fasting. From 12 to 48 hours, your body shifts from glucose to fat burning, produces ketones, activates autophagy (cellular cleanup), and improves metabolic flexibility. We also cover insulin, growth hormone, digestion, and common myths like muscle loss. Learn how intermittent fasting works, its benefits, and how to start safely with proper hydration and electrolytes. This is science-based education, not a prescription. Timestamps 00:00 – Introduction 00:13 – What Happens When You Fast 00:56 – First Few Hours After Your Last Meal 01:42 – Metabolic Switching: 12–24 Hour Fasting Stage 02:12 – Autophagy: 18–24 Hour Fasting Stage 03:05 – Brain Boost: BDNF Production During Fasting 03:58 – 🔴 INTEGRATION: NEW ME (Lifestyle & Metabolic Health Programme) 04:51 – Fear of Muscle Loss During Fasting 06:16 – Hormones, Minerals & Safe Fasting Tips 07:56 – Final Takeaway: How to Start Fasting Safely ----- Medical comedy (Medcom) shows: I love doing medical comedy (medcom) stand-up shows. This is a wonderful opportunity to meet you all in person and also to promote awareness of a healthy lifestyle. ----- For shorter versions of our long podcasts, please checkout the following channels 1. Gut Feeling with Dr Pal Shorts - We highlight the important points within 1 minute in this channel. https://youtube.com/@GutFeelingPodcastShorts?si=PF-7MZPjMAKU9HWi 2. Gut Feeling with Dr Pal clips - Please find the highlights of the best episodes from our podcast. https://youtube.com/@gutfeelingpodcastclips?si=sSYoYnowk9DCHb3v ----- Our holistic weight loss/chronic disease reversal gut health program - "NewME " Are you interested in joining our program designed to help you make lasting changes to your lifestyle so that you can be free of medications? https://drpalmanickam.com/gut-health-program/ Email: newme.fit6@gmail.com ----- For Tamil videos, Subscribe to my YouTube channel: https://www.youtube.com/channel/UCYxezj89xof3XRLFqly20VA ----- Follow us on: Facebook: https://www.facebook.com/Dr-Pal-102856268051377 Instagram: https://www.instagram.com/dr.pal.manickam/ Twitter: https://twitter.com/drpal_manickam Telegram: https://t.me/Ask_Doc_Pal For Collabs & Enquiries: Email: askdocpal@gmail.com ----- Our charity work - https://www.vmfus.org/ . We support hospice patients and specially abled kids by running a free school in Madurai. #askdocpal #drpal #IntermittentFasting #WeightLossJourney #BellyFatLoss #TimeRestrictedEating #IFResults #HealthyEating #IFCommunity #FastingForHealth #LoseWeight #FitLife #FatLossTips #MealTiming #IFGoals #BellyFatBusters #EatClean #IFSuccess #FitnessMotivation #BurnFat #HealthyHabits #MealPlan