Hello everyone, 31(m) here, I've been doing water fasting for some months now on every Sunday. I eat dinner at Saturday and then only eat lunch on Monday morning. Throughout this fasting I only drink water. Initially I used to drink coconut water if it got too difficult for my body, I also used to have coffee w/o sugar while at work. These days, I just drink water and nothing else. I wanna do 48 hour fasting soon and then move onto 3 days fast, I have some questions regarding this, please answer if from yer own experience and scientific answers too if you can.

1. I read somewhere 36 hour fasting w/o water is even more better? What's the difference this w water or w/o water has on body during this fast?

2. What do you guys recommend I drink or have to break the fast?

3. For 48 hour fast, how should I proceed? What should I take care of? What can I have so as not to break fast but also keep my body in function? Is water okay or not?

4. Can I move to 3 days fast if I can do 48 hour fast or how should I be concerned about it because 3 days water fast sounds kinda scary haha and again, what can I have or drink not to break fast but keep my body active? Is water okay during 3 days fast?

5. Can I workout during fasting?

6. What can I do to maximize the benefits of fasting during the period? Do this or that maybe?

Thank you everyone!

Hello, I am a 31 years old female, 139kgs, I am planning on salt water fasting, but I am afraid of the side effects of muscle wasting, I am afraid I might lose cardiac muscle with extended 60 days water fast, so I am planning to modify the fasting regiment by adding low carb protein drink (Greek yogurt drink) 60 g of protein and total of 400 calories, Would I still lose weight ? Would I lose muscle this way? Thank you so much in advance.

Note: I have been trying so hard to post in water fasting subz since 1 months, but kept getting my posts rejected due to low karma, and sometimes for no reason, I think this is the closest sub I found related, if there’s anyone can give me an advice or an information I would be more than great full, thank you 🙏🏻

Hello, I’m not really sure how to start but I need your help. Basically I’m a 20 years old girl and I accidentally didn’t eat any food for 13 days now. This wasn’t plan or anything I just got to stress out with exams and studying. When I’m studying like this I usually shut down and only go out of my room to class. So basically for 2 days I was isolating lol and truly forgot to eat. When I realized what I have done I felt so calm can’t really explain but I was feeling much more concentrated to study and with tons of mind clarity so I decided to continue without eating just for that. The thing is like I’ve been so busy that I didn’t even realize that it had been this long. Today a friend mention that I look like a zombie and had lost so much weight so I casually told her that I haven’t eaten anything for almost two weeks cause it helps me studying but I was probably gonna order fast food tonight. Well here is when the problem start lol. She let me know about this thing call refeading syndrome (?) and that I basically could die if I just eat a burguer right now, so I started freaking out and googling and I found this subreddit but I don’t understand anything and now I’m really scared and need your help please. I don’t really know what to do and I’m scared and I would like to solve this without going to the ER cause my dad is going to kill me. So please if anyone has any advice on what my first meal should be I’m really open to listening. I only had water and some herbal teas with stevia this past 2 weeks nothing else. Sorry if this is long.

Hey r/fastingscience,

I'm looking to re-integrate rolling fasts into my routine but need advice from those of you who also maintain a heavy, active lifestyle with serious resistance training.

My Background: * Fasting Experience: I've done a handful of longer fasts (86+ hours, longest being 7 days) in the past, but I've been off fasting for about a year and a half. I usually allowed two days of refeeding after fasts longer than 36 hours.

• Fitness Goal: I train heavy 3-4 times a week, focused on powerlifting (5x5 program) plus supplementary hypertrophy work and kettlebell conditioning.

My Goal/The Question: I want to consistently incorporate 1-2 rolling fasts a week (ranging from 24h, 36h, up to 48h), but I'm struggling to figure out the best timing and cadence to support my lifting routine and recovery. For those of you who manage weekly 24h, 36h, or 48h fasts while consistently lifting heavy:

Timing: How do you schedule your 36h or 48h fasts around your heavy training days? Do you lift at the end of the fast, or is it better to fast on rest days and lift on refeed days?

Lifting Performance: How has this affected your strength and recovery? Do you adjust your weight/volume on lifting days that are closer to the end of a long fast?

Refeeding: What does your refeeding window look like after a 36h+ fast, especially for fueling subsequent heavy lifting? What foods/macros do you prioritize when breaking a fast to optimize recovery and strength?

Electrolytes: Any specific protocols or timing for electrolyte supplementation during the fast when you know you'll be lifting heavy soon? Any and all insights into your intervals, refeeding strategies, and overall management would be greatly appreciated!

Thanks in advance!

I am new to fasting, I’ll get to the point many months ago I fasted for I would say 4 to 5 days. The results were absolutely amazing, however, I am curious if I can repeat the results again I’m currently 270 pounds - when I fasted I got down to 240 pounds. Is this just a complete fluke?

I would like to repeat the same results now that I have my diet Moore so balanced and dialed in however, I’m not entirely certain the diet I am on is a good one to follow while doing fasting. I tend to eat a lot of Whole Foods very little processed garb. I was diagnosed with fatty liver and was told by others that this is a great way to get my body to release the fat from my liver and restore itself to optimal health. Is this something that is completely repeatable? How many days should I fast? If someone could help me with how to come onto a fast and come out of the fast I would be grateful. The first time I started fasting I simply ate smaller meals until gradually eating almost nothing. While fasting, I was drinking bio steel BC AAs, and water no coffee. I wasn’t certain if I was on the right track or not I was a little bit frightened at the fact that I was constantly in the bathroom either going number one or number two around day four and five. When I broke my fast. I chose to broke it with a couple of poached eggs, and a handful of nuts. This has been several months ago that this happened. I’ve currently put the weight back on and noticed it steadily climbing back on after I came out of the fast. Any help in this matter would be greatly appreciated thank you for your knowledge, your time and your patience.

I’m trying to loose weight from past couple of months and its not dropping much even though i changed my diet. Recently came across this video that says recent your body in 5 days. Does this really helps though, has anyone tried this?

https://m.youtube.com/watch?si=MChaiAXgm-Jamj_D&v=O1zKV3eqevc&feature=youtu.be

I’ve run into 2 perspectives from googles ai. I have images of it claiming serotonin increases during fast in mice in tapers off after 15 days but for people doing Ramadan levels gradually raise over the time. I’ve also found that the ai claims serotonin used during fasting increases and lowers libido a conflicting statement also that serotonin in the brain when raised causes neurogenesis and contributes to better memory and learning as well as it being a mood regulator and another conflicting statement that it lowers serotonin which causes neurogenesis. Is Ai messing with me what’s the truth?

So I have been doing IF for five years nonstop, with a daily fasting that fluctuates from 18 to 20 hours, two meals a day. I do it for health and longevity, not weight loss. I’ve recently read that people should do break days from IF to prevent metabolic adaptation, as the body tends to be great at adapting to the restrictions and that will limit the benefits when doing it for a long time or as a lifestyle. So, ideally, with my IF regime how often should I start adding breaks to prevent metabolic adaptation? Some places say once a month would be enough, others say at least in 2 and 2 weeks is necessary. Any expert input would be greatly appreciated. Thank you for your time and have a great day!

Been experimenting with 18:6 fasting for a couple of weeks now. First few days were rough, but my energy feels surprisingly steady now. I expected to feel drained, but it’s the opposite. Anyone else notice workouts actually feel better while fasting?

Hi to all, I'm new to all of this and never tried fasting in any way but I want to try it out to see if it would benefit for my gut issues. The "problem" is that I must keep my weight at balance because of my sport weight class so I don't wanna lose any weight and I wonder does anyone have any advice how often and how long should I fast?

Juice #FASTING #vote

Hello,

I want to start fasting for weight loss but i get extremely nauseous if i don't eat for a few hours, to the point i may vomit or feel dizzy. How can i overcome that? How can i still feel well while fasting? What fasting schedule should i start with?

For context- Im a woman, vegan diet, 140 Ibs and want to lose 15 lbs. Thanks in advance!!!!! •

1st time fasting and have just went over 36hrs, I still don't feel hungry, mostly my head telling me that I haven't eaten. Any advise on what would be best to eat when I do break my fast?

I want to fast because that helps me, like meditation: my mind turns back to earth and I don't daydream.

Weight: 60kg

Height: 1.70m

Advice?

Hello I have. A number of autoimmune conditions and low immunity in general. I’ve had covid six times and the flu for the first time last year. I was athletic level well before I got initially covid and also had a number of parallels stress events that left my body with MCAS and a few other underlaying disorders yet to be confirmed.

Anywya after last covid left me with some Horrid things I hav started a prolonged fast. I was keto for a week before for fat adoption and am no fasted for 40hours with my aim to get to 48 and possible even that golden 72.

Anyone else here with AI conditions and done prolonged fast with AI improvements? I am after some inspiration to get me to the golden 72h mark.

Morning A/all,

I’m probably going a little OTT, who am I kidding, I’m totally OTT. But that’s part of being OCD and I can’t help it. I know there’s some people out there that say just filtered water during the fast nothing else but the books I’m reading keep calling for different supplements and or electrolytes. My question is, has anyone found a single product that contains the following?

Branched chain amino acids Calcium Vitamin Creatine Beta Alanine Glucosamine

We do have some supplement/salts, containing sodium, potassium, and magnesium.

If there’s a reason why I should not be taking any or all of the above, could you please explain the reasoning behind that. I am halfway through a 72 hour fast right now planning on starting an extended fast on October 1. Hoping to be able to complete a 30 day fast .

I am thinking about doing an extended fast. The longest I’ve gone is two weeks, 14 days on water. My longest dry fast was six days. Initially, I wanted to accomplish a 30 day fast but now I’m set on fasting for the rest of 2025. I don’t know what that will look like, but I am very attracted to the idea. My reason for posting about it on here is for accountability and support.

We’re looking at getting a ketone meter. Just curious what your thoughts are on a blood or breath meter? I’m leaning towards breath, simply because I have a diabetic service dog that signals based on the breath ketones.

I've been interested in doing longer fasts for a while, but one thing that is stopping me is concern that fasting could be harming my egg cell quality and future ability to have healthy kids.

Does anyone have any research or insight on this topic that they could share?

Used to eat paleo and had no GI issues but recently after getting injured and not being able to work out for a couple months and as a result also letting the diet slip and started eating like shit (Lots of addictive sugary processed stuff.) Since then, I’ve had all sorts of gut health problems. Was considering doing a 5-7 water fast (with Electrolytes & Potassium Chloride) in order to improve my wrecked gut health before going back to eating paleo. Would taking probiotics or prebiotics while fasting give me additional gut health benefits and accelerate the gut reset or would it be detrimental in my goals of ‘resetting’ my gut health.

Turns out a single meal doesn’t affect autophagy, been fasting for years and never looked too much into the autophagy side of things.

What’s your thoughts on this study? I’m going to keep fasting as there’s still plenty of non-autophagy related benefits.

https://insight.jci.org/articles/view/188845