I personally am not interested in fasting for any more than 20 hours at a time. However... For someone with a really fast metabolism (in excellent cardiovascular shape, with a low body fat percentage), would their metabolic rate and body composition...
Does anyone have a similar experience or any links to information on this topic? For me, its weird and pleasant, but I want to know why. I'm an experienced faster and I've done numerous 16 day, 13 day, 8 day...
Hi, I'm a 36F with a goal of losing 60 lbs (5'8", SW 230 lbs, GW 170lbs). I am really interested in doing extended fasts (5 days, then 7, 10, 14). I have a couple questions for you more...
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My personal trainer referred me to [https://www.amazon.ca/Fast-Metabolism-Diet-More-Weight/dp/0307986276](https://www.amazon.ca/Fast-Metabolism-Diet-More-Weight/dp/0307986276) At it's most basic: No wheat, corn, dairy, soy, sugar, caffeine, alcohol, dried fruit or fruit juices, artificial sweeteners, fat-free "diet" foods Diet confusion, cycling diet with a change in strategy every few...
What has been people’s experiences in terms of noticing any worsening of metabolism after fasting? I know there’s a theory that fasting can slow the metabolism and create issues in the long run. I’m not sure if there’s an answer...
I was thinking of doing a nice long 30-day fast, but I am a tad worried of the rumored threat of "permanent" drop in metabolism. I don't like the idea that the human body would permanently drop metabolism from a...
Below you can read my other recent post with some useful details related to this question and specifics about me, but.. i like my OMAD routine and dont plan on changing it anytime soon.. that being said, could I possibly...
**How often can I fast? Can I do it regularly? I heard it slows your metabolism if done continuously. How often do you fast?**
If you were chaining prolonged fasts, say 3 to 6 days, between a couple of days OMAD, where OMAD calories would at least meet total usage for the day or even a slight surplus, would this lead to a metabolic...
EDIT: Alrighty, everyone, that's a wrap! Thanks so much for the excellent questions. If you have more questions, check out the Fasting FAQ at my website, https://www.stevehendricks.org/fasting-faq, which has about 10,000 words of answers to the most common questions I...
I recently heard this claim. Was wondering if it's true
I’m 18M, 6’0, about 130lbs. You could say I’m kind of skinnyfat in the abdominal area. I’ve never paid much attention to my diet because I’ve always had a fast metabolism and I’ve never been close to overweight, so I...
I want to start fasting… I really think it would help. I’m just concerned with what I heard- that it slows metabolism down
Will fasting for 1-3 weeks cause my metabolism to slow down? My bmr is already only 1200kcal, and I don’t want it to slow down more.
I've seen a lot of studies pointing out the benefits of timed restricted feeding/intermitted fasting and not snacking through out the day, however I saw an article of Sumo Wrestler's diet and here is the quote from it:" Sumo wrestlers...
Hi guys! My mom is 56 yo and she decided to try Intermittent Fasting. I recommended her to go with 12:12 for now, and see how it goes. She is very concerned about her metabolism tho, thus, do you have...
Hey there, I just started IF a couple months ago, and now I think I am ready to face fasting for 3 days, obviously while still keeping hydrated, however I am afraid that by not eating for 3 days every...
When you exceed a certain number of hours of fasting, around 20 hours, your body starts producing something called Reverse T3, which is used to reduce metabolism. To understand what reverse T3 is, we need to know what metabolism is...
I'm hoping that some of you very smart people can help me, because I am real confused here! There is so much information out there, and some of it appears to be very contradictory, so I'm not really sure what...
There are some foods that have a caloric deficit, such as celery or super low like pickles.
So I was on TikTok and I came across some videos saying that if you eat low calories (1000 or 500) a day your metabolism will slow down and you won't lose weight. Because your body has gotten use to...
Hello there all - I am not new to intermittent fasting, but would love to give it another try. For context, I am 22 years old (f) and cook almost daily. I am currently struggling to develop healthy eating habits,...
I'm currently beginning an intermittent fasting diet, however I've been told by some people that this will slow down your metabolism, causing you to lose less weight. Firstly, is this true, and if so, is it permanent. Secondly, would...
I have ADHD and B.E.D that I'm getting treated for. I also eat Keto and do IF and these help me lose weight, feel great, and better manage my B.E.D. I did not tell my doc that...
I have always had high at rest metaolic rate due to which I typically dont gain weight with normal diet. As I have aged I have put on some weight, my cholesterol level has been off the chart. I am...
I keep hearing that prescription Rx doesn’t break your metabolic (not caloric) fast, but literally everything else except water will. Why is this? Do fasting gurus say this to avoid legal responsibility of someone not taking their pills to avoid...
First of all I want to say thank you to the community for helping me controlling my hunger. I am mainly a lurker but that was the main reason for starting the 16/8 routine and I am pretty happy with...
Does metabolism really start to slow after 3 days of fasting? What do you guys tend to find? I tend to do rolling 48 hour fasts time to time because of this reason, but have the chance this week to do a...
I could not find any materials on extended fasting
I fasted and did low carb for about 5 months and lost a lot of weight. Im the next year, i decided to stop smoking and ended up gaining rhe weight back. I decided to try to lose weight again this...
I'm doing IF 14-16 hours everyday and eating around 1000-1500 kcal daily. I know that fasting doesn't wreck your metabolism, but calorie deficit does. In my case, since I'm doing both, will it still eventually slow my metabolism down?
I’m very new to this sub but I’ve been doing IF for a while. I like the results and I feel better so I’m looking to do a longer fast. Start at 48hr. However, I’ve always heard that “starvation diets”...
So I’ve always had a hard time losing weight. I can literally workout every day, and eat like salmon and spinach and barely anything else in a day. I just won’t budge one lb. However I’ve recently discovered with fasting,...
Not planning or condoning this, but curious from a biological perspective. If one had a way of speeding up one’s metabolism (eg exogenous thyroid hormone) and applied it at the point where metabolism would theoretically slow down, could the length...
I’m low on money funds, I been doing alternate day fasting. I had a hiccup with my ebt due to my bank account being tied to a deceased family member. Will eating only 1200 ish calories every other day wreck...
I’m pretty new to the diet and in my second week. I did a 4 day SJ fast, a refeed and now am on day 4 of a 5 day SJ fast and plotting on my Saturday refeed. I’m nervous...
I was wondering if you should you eat at a deficit on refeed days? Doing EOD/ADF if that matters.
I am in 12th grade and decided to write about whether fasting is a dangerous diet trend or a medical remedy for my research paper. I started researching the literature and found a few good sources, but most of it...
[Dr. Bikman (@benbikmanphd) • Instagram photos and videos](https://www.instagram.com/p/Ch8D52vj9jc/) [A New Twist on Intermittent Fasting, According to New Study | by Kelan Ern | Aug, 2022 | Medium](https://medium.com/@kelancoaching/a-new-twist-on-intermittent-fasting-according-to-new-study-306c3b170679) [Effectiveness of Early Time-Restricted Eating for Weight Loss, Fat Loss, and Cardiometabolic Health in Adults...
I'm curious what your dietary and metabolic preferences are, as fasters. What's your preferred diet, what are you eating most of the time (and especially between fasts), and why? [View Poll](https://www.reddit.com/poll/10ps67l)
I’m reading and hearing mixed things about fasting and metabolism. Some say it slows your metabolism down and you’ll just gain back all the weight that you lost in the fast even if you just eat normally …. some say...
Hi, I’ve IF,d for a few years now but I gained some concerning weight during COVID. The gym is such a chore and boring for me. I refuse to buy bigger clothes because that would be conforming to defeat. Albeit, I...
I used to dry fast quite a lot. I found it pretty easy to dry fast from waking until I ate about about 6 or 7pm, then eventually having some water. Now that I'm coming back to dry fasting, I'm...
So I know a lot of you have lots of info around on fasting. In particular what I'm looking for relates to respiratory quotient (RQ) and fasting. So I think most of us are generally aware of the \~3 day...
Is crashing the metabolism a real thing? I can’t just fast for 30 days and be alright? Can I have 500 cals a day to avoid any issues? Hunger really isn’t an issue for me and my body fat is...
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I had 2 RMR tests done to see how my metabolism changed. Figured I'd post here! 26M/5'11"/SW250/CW205/GW170 The tests were taken around the same time of the day, in the morning. Test 1 was done on a Monday and I had...
So this is the first time, I am able to hit my goal. I feel energetic and feel like i can go couple more days should I go on or break my fast? I am just concerned about longterm effects...
Received this email today from Dr Fung: Fasting and COVID-19 A lot of people are worried about how fasting affects the risk of COVID-19 virus infection. The truth is there is no good information on this subject at all, so everything is...
Hello, I'd love to see some success stories of people who have done rolling fasts and kept the weight off. I want to try this but am concerned that I won't be able to maintain the weight loss without adopting these...
Long story short, I started doing intermittent fasting in 2021. From Sunday to Friday evening, I ate once a day, from Friday evening to Sunday I ate anything. I lost 16KG in 5 months, I was doing great, then summer...
And if so, why are “starvation diets” deemed unhealthy for weight loss? Does your body “live off of itself?” During a fast? Is “metabolism” a myth in weight loss?
i normally do not drink a lot of caffeine at all, maybe some green tea a few times a week. however i'm practicing dry fasting lately and i get super exhausted halfway through the day which really affects my concentration...
Diets have come and gone over the years and all connect with some sort of idea that eating needs to be “one way only.” What myths are still floating out there?
from what i have been reading, caffeine supplements can promote the body to release fat cells. https://www.healthline.com/nutrition/coffee-increase-metabolism > it’s one of the few substances known to help mobilize fats from your fat...
I really like OMAD because it's consistent & is an easy habit to get into. I'm sure I could just eat like this forever, until I hit my goal weight. HOWEVER, I ran into this: [https://idmprogram.com/wp-content/uploads/QA-32.pdf](https://idmprogram.com/wp-content/uploads/QA-32.pdf) ​ >So OMAD typically works for the patient...
Hi guys I am a young (19) male fasting for metabolic flexibility, autophagy and general health purposes. I naturally have a very low PBF (~5%) and have done strength training the last 2 days of my water only fast, with 3...
So I’m about 21 hours in and I’m passed the point of dizziness and being lightheaded I bought some multivitamins and been drinking water . I feel like I’m doing better than I thought I would and I don’t wanna...
I want to hear the most controversial opinions
I started fasting 4 weeks ago where I only would eat one meal in the evening. Ive had the help of Adderall (prescribed) which has suppressed my appetite a lot. I started at 256lbs and am now at 240lbs. I...
i’m gonna try to fast for a week, safely obviously. i have vitamins, and i’m going to drink a lot of water. i’ve never fasted for this long and am wondering if drinking liquids with calories in it (eg coffee...
I’m on day 21 of a 30 day fast. I’ve taken herbal tea and a couple pieces of sugar free gum since I started. I’m also taking electrolyte tablets. My ketones are 4.5-6.1 by keto mojo. I did a dexa...
Everytime I go find some answers on Quora about fasting, majority of people say to not fast because it’s unsustainable for weight loss and bad for your health. I been intermittent fasting for quite some while now and I feel...
I'm not usually hungry in the mornings, but I like having some coffee with heavy cream sometimes. Usually, I stop my fasting clock on Zero when I have the coffee with cream. Recently, I read this article from them about [whether...
[Belly fat resistant to every-other-day fasting](https://www.sciencedaily.com/releases/2021/03/210303161656.htm) Does anyone have anecdotal experience reflecting this?
Hi guys! So I’m due for surgery in a few days and was hoping to do a 2 day dry fast before the day of the surgery to aid in my recovery. I’m meant to go in fasted anyways but I’m...
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I've been doing IF and 24/48 hour fasts for some time now, but recently have become interested in doing an extended fast of 7-14 days, and perhaps beyond that, mainly for the autophagy and mental benefits. About me: 29M, 6'3, 200lb....
Bit of backstory, about 3 years ago some stuff happened in my life and I decided, on a whim, to fast for a couple of days. I'd heard about the mental and physical benefits and boy did I feel them....
I’ve been consistently doing 16:8,18:6,20:4 for a few months—usually eating normally (when I want) 1 to 2 days a week. Is this too many days of consecutive fasting? I understand the metabolism slows/adjusts if you fast too often, too repetitively....
I suppose this should be phrased as "why is 1200 calories considered a minimum, regardless of activity, gender, height and weight". I understand that this would be a substantially low number for a tall active male, however when you start dropping...
Do I break a 10 day fast at dinner (day 10) or in the morning (day 11)?
[Here is a list of countries by average daily food energy intake](https://en.m.wikipedia.org/wiki/List_of_countries_by_food_energy_intake). USA is at 3782 per day, and other Western countries are not far behind. How is this even physically possible? I am trying to do the math and I cannot...
Recently I wrote an article that explores why fasting is a better way to reduce body fat than just counting calories. Here are some key takeaways: --Nowadays people are eat 5 or 6 times a day, rather than just 3 --Eating all day...
Here's the list of things I take daily, all in pill format: Magnesium + C, Potassium + Calcium, Vit B complex, L-Carnitine, A drop of A+K2+D3. I do daily IF 18-6 and every 2 weeks I do a 72h. IF days...
I'm interested to hear your arguments against following a plant-based (plant-forward) diet. I don't mean vegan or vegetarian, but essentially an omnivore diet that's centered on whole plant foods (whole-food plant-based, WFPB) and sometimes adds animal-based and ultraprocessed foods. I'm surprised...
Welcome to the weekly [r/Nutrition](https://www.reddit.com/r/Nutrition/) feature post for questions related to your personal diet and circumstances. Wondering if you are eating too much of something, not enough of something, or if what you regularly eat has the nutritional content you...
Hello everyone! I’ve been doing OMAD for almost 3 years now. I’ve dropped from 250lbs to about 160 lbs at my lowest. I also did dirty keto while fasting. I recently gained about 20-25 over the last year while I...
It seems the data on drinking black coffee during your fasting window for autophagy is not clear. Does anyone here know a bit of information on the effect of black coffee during your fasting window? Would it interfere the benefits of fasting...
In the past, I’d try cutting calories, and my metabolism would almost freeze. No matter how little I ate, I’d only lose a few pounds and I’d gain it back the moment I started eating normally. Keto during...
Hi so I heard that the reason fasting is so great is because it Dosent effect your metabolic rate. I did multiple 3 day fasts and intermittent fasting\ omad on the days I ate. After I stopped I found myself...
Hi, I saw a video about intermittent fasting. I believe Dr. Fung siad he didn’t recommend a calorie deficit for weight loss and that fasting is better. He siad our metobolic rate adjusts when we are in a calorie deficit...
F, 23 I’m 5’4” and weigh 145 pounds. I have a good amount of excess fat. If I had little fat, I would not fast. But since I have excess fat storage that will be metabolized into fuel for my body,...
A year ago I water fasted for 30 days and after that I went back to eating normal meals 3 times a day. By normal I mean healthy regular meals and not junk food but I wasn't exercising. Before fasting...
I have 30 pounds to lose, I exercise a few days a week with walking and biking but am otherwise sedentary. I eat clean. I rarely eat out and I make 90% of my own food. Salads with evoo and...
There have been stories about the contestants on the show The Biggest Loser where most of them gain the weight back. The explanation was something like they were under severe caloric restriction and it permanently messed with their metabolism. And...
F23/5’6’’ So I weighed 93.2 kgs before my three day fast which started ten days ago. Only consumed water and green tea during that time. At the end of the fast I weighed 90.7 kgs. I was happy. Now I’m back...
I have a question on how the metabolism might react to water fasting vs very low calorie (say, under 500) when you do it over a period of time. On one hand I've heard it said that if...
I have just finished reading the Obesity code by Jason Fung and have a question regarding CiCo. I know CiCo is a somewhat controversial and confusing topic but I can’t seem to find any answers for this question I have...
I have been having periods of increased hunger (in general) and I've heard from quite a few people about switching, to say, keto diet and experiencing increased hunger. If one wants to introduce fasting to increase the wellbeing, how does the...
Hi, so I heard doctor fung talk about how fasting for periods of 3-4 days won’t slow your metabolism. He showed a chart of someone’s metabolism when on a traditional low calorie diet wich included carbs compared to someone fasting....
I have a book from only 2010 from a major health magazine that says that fasting creates a response of lowered metabolism, and is not a good method for fat loss. I understand they might have been wrong and sometimes...
Im new to water fasting long term and I never really dived deep into how things works. I've usually done 1-3 day water fast and i wanted to start doing 5-7 day so i had some questions and tips. does water fasting slow down...
I'm not specifically trying to gain or lose weight, I'm just trying to find a comfortable pattern of eating when I want and need to without restricting myself or binging. Intuitive eating as it were. Despite this I do still...
[https://www.youtube.com/watch?v=wCX-Jdiv9F8&t=4145s](https://www.youtube.com/watch?v=wCX-Jdiv9F8&t=4145s) I was watching a Lewis Holmes interview with Dr. Valter Longo who stated that people that skip breakfast had a greater incidence of cardiovascular and other health related problems (right around the 30 min mark). I found this upsetting as...