My appetite when not fasting started crashing after about 4 months. This is done to increase the amount of fat being burned and increase lean muscle tissue . Sorry for the late reply, brother. Boy, the people who are just so happy and pleasant in these posts are unrecognizable to me. Obese? I have tried adding in Na/K/P + trace minerals during the fast, wondering if it is a delayed reaction. According to Dr. Fung some, or most, of what people think of as loss of muscle mass is loss of fat in the organs, instead of loss of fat in the more measurable places. But long fasts seem more evolutionarily aberrant. Unfortunately, i went back to my old way of eating and gained it all back plus. Another four day water fast early this year did some improvements but unfortunately a heavy period stalled the fast (was intending 10 days) as I became weak and suspected anemia which I’ve struggled with in the past. After a few days my sinus problems went away and the skin on my arms was a lot better. Maybe the fast was not Long enough ? He dispells old myths like this with real data. A quarter to a third of the loss was body fat, the rest lean mass—mostly muscle.”. and only 15 lbs. Drink green tea during the fast. I’m on day 10 of my prolonged fast. For me this means nothing at all after dinner (other than water) and a single cup of tea in the morning. I have a lot of muscle mass ( 95 percentile of guys my age ( 41) according to the dexa results. My current situation is not conducive to fasting like that but I intend to try it again when I can. It was quite interesting. Don’t make it a habit. My RHR is normally in the low-to mid 60s. Because of my previous fasts (in my opinion) day 1-4 of this fast were super easy (only very slight fatigue) but day five I crashed. I need to look at ways of restoring ithe mussel mass if I want to continue.the fasting. No difference. The only ones who want us to believe that we’ll waste away from fasting is Big Food and Big Pharma. People with medical conditions should work with their doctors especially anyone on medications. Thanks Meg, good to know! I just finished my second two day fast and my blood sugar is responding beautifully. Fasting isn’t famine, but it’s similar enough that we should heed the story. Sure, a long fast with medical supervision and electrolyte and vitamin supplements can work. I can be somewhat full for a couple days now. The whole issue of muscle loss from prolonged fasts is confusing. After 382 days, he was 180 pounds, having lost 276 pounds. “And this is due not just to the deep and comprehensive cellular autophagy, but also the complete and holistic rest that attends a properly conducted, therapeutic fast.” is something I hadn’t considered before … fasting being a way to give the body rest and a deep clean, I’ll have to ponder this some more . Fasting is thousands of years old. Then I wait a while and eat a normal meal. Take two or three days to ease yourself back into your normal routine. Actual muscle loss would be the very last thing to happen, as someone mentioned before. Thank you for this post. At the peak weight I’ve become almost debilitated. Reaching the fed state wasn’t a sure thing. I vastly prefer getting my electrolytes through a tall glass of Gerolsteiner mineral water (magnesium and calcium) spiked with sea salt (sodium) and lime juice (potassium). I did not even pay attention to them because they were mildly annoying at the worst. Especially if you do body weight squats while fasting. If you’re fairly healthy and happy and everything’s going well, I’m not sure. Did my first sprint today as part of the PBF program and have had great success and feel this will be our lifestyle for the rest of our lives. It was a very odd sensation. Anybody know where the paper can be found, or even just the title? Case 2, mixed connective tissue disease: Symptoms included severe joint pain, chills, facial edema, weakness, fatigue, myalgia, photosensitivity, and tachycardia. It helped my SIBO so much though, I really want to do another. “I’ve read (from Dr. Jason Fung, mentioned elsewhere in this comment thread) that even small amounts of protein can break the “fasted” state and stop autophagy”, That’s why I would think bone broth is a bad idea for autophagy. Still, it was fun to get down to a weight that was much lower than I’d been the whole year. The benefits Valter Longo has found for fasting with chemo (regeneration of immune cells, and protection of non-cancerous cells from chemo effects) only occur is the fasting takes place BEFORE the chemo. at about 1:10: Your email address will not be published. But I believe I am usually or always in ketosis to start with as I follow a very low-carb, high-fat diet. I’ve been doing 36-hr fasts about every 7 – 10 days and feel GREAT! When cancer patients don’t have an appetite, respect that instead of forcing food (which is usually starchy junk anyway). Have you tried one? On the days I do eat, I try to keep my eating strictly between the hours of 1pm and 5pm. Doesn't it kinda make sense that after a period of "not being able to acquire food" the body would prioritize muscle growth over fat storage with excess calories because muscle is a better long-term investment? What was your body composition like when you entered the fast ? Not even a mark where they had been. Long fasts are serious, and you should have a serious reason for embarking on one. But nobody really knows even how many critters we contain, let alone the ecosystem variables that dictate our epigenetic fate due to these multitudes within us. What’s the purported reasoning behind not eating for days on end? I’ve found this while on day six of my fast and I’m very pleased I did. The 1960’s study sounds bad but 50% having measurable long term improvement after a single 10 day fast is quite remarkable given the figures being bandied about for diet failure exceeding 90%. Tried a long fast of three weeks once. I drink these daily. It wasn’t bad, and the best labs I’ve ever had. Fasting was considered a cleansing procedure without any connotation of harmful muscle burning. When an animal in the wild falls ill (or when a lion gets bit by venomous snake), it retreats to a secluded place and refrain from eating and drinking, until it get better. Hey! This is normal and natural and there is nothing here to be feared. During fasting, insulin and glucose plummet while counter-regulatory hormones increase (e.g., growth hormone, adrenaline), setting up a milieu that favors fat-oxidation and enhanced autophagy. So far, I have gone from a size 16 to a size 12, even though I’ve only lost 5 lbs. Instead of burdening the body with digestion that pulls scarce resources, it best to let it be. of water and 20 lbs. I normally wake up around 6:30 every morning. Fasting with fluids gets the job done. Am about to take another run at it. But if you are eating right and moving, I doubt you’d need this extreme of a regimen. Most dieters nowadays eventually regain most or all of their lost weight. I’m having a repeat dexa scan tomorrow and it will be interesting to see how much fat/muscle mass I’ve lost …if any. I will make another post in a few weeks. If you continue to use this site we will assume that you are happy with it. For me it is a lesson learned. IF allowed me to break that plateau. True north in Santa Rosa was an option I was looking at but couldn’t afford. In a woman with stage IIIa low-grade follicular lymphoma (non-Hodgkin’s), a 21-day water fast greatly reduced lymph size. And if there are hazards there, could they be mitigated by supplementing with probiotics and daily non-caloric prebiotic fiber to keep the critters happy? You’re suddenly having to store fat, make and store glycogen, and conduct various other metabolic processes that increase intracellular nutrient requirements. However, if you want some of the benefits from intermittent fasting but want to optimize muscle mass, I would advise a different type of fast. I did try a long fast this year in June. This also happened while on the Atkins diet. I usually do 48h to 72h and i dry fast. A few years back I attended a lecture on avoiding cancer, and the doctor discussed something like the research you mention above. This experience has helped me realize that I can be the master and not the slave to my body. From now on my goal is to maintain 36 hrs of fasting followed by 12 hrs wherein I will ingest around 1500 calories. In fact, studies have shown that true starvation response involves your own body consuming all your muscle. I’ve done a number of water only fast over the last year. What is considered a long fast. Thanks for this post it was exactly what I was looking into, I want to implement short fasts into my personal prayer life and am also on a strict workout and nutrition regime for health and weight loss and didn’t want to interfere with it, it’s good to read there are ways to do it carefully that won’t disrupt ur regime but also can have benefits health wise not to mention the clarity u gain spiritually from denying urself. But 3 days AFTER I end my fast, my pulse starts RACING. Just a theory but think I’ll try it. I mainly used 5-7 day fasts. I did not lose any muscle mass from what I can tell. Instead of being pear-shaped, I looked small-shouldered and scrawny. I think you need to read Jason Fung. I know for a fact you will have higher levels of IGF/HGH days after you break your fast so this must have a positive effect on muscle growth if you work out during the fast. Just standing up and puttering around one’s house is better exercise than he got. But the backlash afterwards is concerning. It’s also lowered my blood pressure at least 15 points (systolic), reduced my insulin resistance and blood sugar, asthma, allergies (went from gobbling multiple pills per day to one per YEAR), GERD, overactive bladder, skin tags…too many to list. Starting three years ago, I got back into fasting and I have done perhaps 5 to 7 one week long fasts. Most of my bacterial enzymes are from Greek yogurt and aged cheese. Meg, that’s the information I’ve also gleaned from reading Valter Longo’s work. I’ve never had issues with blood sugar. My usual is 36-45ish, that still be considered short? 2 4 42. Eat creatine (or protein shakes, or eye of newt) and you will build muscle. 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