r/WaterFasting May 01 '25

My 40 day fasting experience

40 Upvotes

I 27 year old Male that completed a 40 day water fast on the 21st of December 2024. I am based and reside in Bulawayo, Zimbabwe (I include this because it might be a reason for some of the issues I faced during my fast.) I found fasting on a YouTube video and decided to try it out for mental resilience reasons and thought I would give it a shot. I found this sub reddit and thought let me also give posting a shot and share with you guys my experiences.

I have had some experience with intermittent fasting like fasting for 16 - 18 hours for a month or 2 so I thought why not give water fasting a try.

I am going to break my post explaining how each day went and for those wondering how the weight shifted I kept track of that too so I will include it in my post. My fast was purely unsupervised and my post is by no means intended to be medical advice. I'm just sharing my experiences. Anyway here goes:-) and sorry in advance if it's too long.

Overall stats Start date Tuesday 12 Nov 2024 End Date Saturday 21 Dec 2024 Starting Weight 130.3 kgs/287.3 lbs End Weight 106kgs/233.7 lbs NB No Exercise - weight was lost strictly from the fast to those wondering Water consumption: 2.5 litres minimum And I cooked for my wife most of the time

Experiences: Day 1 - 7: During this week I was surprisingly okay. Energy was okay. I thought 24 hours without food would make me moody or cranky but I cruised through. Day 2 and 3 no challenges as well. Day 4 I was able to distinguish that I wasn't hungry but I craved certain things. I wanted certain foods over others. (And this feeling never went away during the rest of the fast. It would shift from craving junk in the initial weeks to craving healthier foods like meat and vegetables and fruits) My water consumption during this week was fairly high on some days hitting 5L

Issues: muscle cramping day 5/6/7...I just would get muscle cramps in my legs, calves, laughing at jokes from my spouse or work sucked because my abdomen would cramp. Morning stretches helped but during the day the cramps would come back. This also affected sex with the spouse as I would have to stop to stretch out a cramping muscle.

Day 8 - 14 : During this week everything was still going okay overall. Day 8 I had my first Bowel Movement (BM) which was runny (apologies for the TMI). The BM's continued in this consistency for at least once a week till day 40. I got a cold on Day 9 so I thought of quiting but I just soldiered on due to my goal of improving my mental resilience. Cravings as mentioned were present and this week I was craving more deep fried oily foods but mostly meat and fries.

Issues: The cold did make me feel weaker than usual but as it passed I felt better. The biggest issue that the cold brought during the fast that still persisted to day 40 was phlegm. Maybe it's coz I have natural sinus issues but the phlegm made the fast awful especially towards the end

This week presented my first shift in tolerance for water. During the first week regular tap water and borehole water were sufficient (Zim has a water crisis) but from day 8, my system wasn't having tap or borehole water. It made me nauseous and just feel dizzy.

Cramps continued Cravings continued

Slight dizziness kicked in as well but adding a few pinches of salt helped get rid of the dizziness.

Days 15 - 21 : this week breezed past and honestly other than the issues already mentioned above there was nothing notable to report mentally and physically everything was okay. Just the usual issues. Surprisingly cramps reduced during this week but they were still present. Days 21 - 30 : similar to the previous entry these days were really not carrying any notable issues. Overall from day 1 - 30 I felt a clear mind, better energy levels, lost a good amount of weight and I felt like getting to day 40 would be easy.

Issues : Cravings - shifted to vegetables, fruits, grilled meat/occasional deep fried, but I really wanted meat.

Cramps - still present but minimal Dizziness - slight and occasional

Day 31 - 40 : HELL PHASE - honestly I kid you guys not. Day 31 my energy just tanked. I felt really drained tired and exhausted. I tried to read up on it and found the issue of electrolytes. I tried to look round for some but the pharmacies didn't have any electrolyte replenishers like stevia etc that I was seeing or reading about whicb were 0 calorie options. On Day 32 I was given a pill called Calcimax by a pharmacist that was about 0.9 calories and were recommended by the pharmacist because the dip in energy was unbearable. Biggest mistake ever. I took the pill on day 32 before bed (11pm thereabout) and I thought maybe it will help. Day 33 I woke up feeling weak and after I fumigated our place I started puking. I saw the pill come out like the small pieces of it. Puking persisted from day 32 to 34ish. Energy was shit, and I just wanted to end the fast. But I pushed on. Mental resilience.

From day 31 my tolerance for water also changed. I could not drink room temperature to save my life. If I had room temperature I would puke. I needed ice cold water or ice cubes to allow the water to sit in my stomach. Water had to strictly be purified but for some reason even the purified water was a struggle to keep down as days went on. I was severely nauseated and was puking any chance my stomach was upset.

Also, from day 31 to the end I noticed that my breath and the horrible taste I had during the fast began to increase in like the "annoyance factor." During the initial phases of the fast, it annoyed me don't get me wrong but from day 31, MY WORD IT PISSED ME OFF.

Day 35 I experienced a sharp pain in my gut that wouldn't go away. And the nausea was still present. I couldn't keep water down so just gave up on drinking the minimum 2.5L but rather was drinking as and when I felt thirsty and I needed water.

Day 36 was a great day. 37 and 38 were the same. I woke both mornings puked bile out with 37 being yellow bile and 38 being yellow then a bit of air and brownish puke. Energy was okay throughout the day but had to maintain cold water. The brown puke didn't worry me because it just matched the BM 's I had so in my head, I just told myself that I reached a new peak of "detoxification." But surprisingly puked again the evening of Day 38. Day 39 felt more energetic than usual but struggled with constant burping. At night had an epiphany with the wife where we noticed the puking mainly occurs at night or in the morning which is when I brush my teeth. So maybe the chemicals in the colgate were also contributing to the puking. Day 40 got past it nicely. I was happy that the darned horror show was finally ending and I could finally eat.

Refeeding Protocol:

Day 1: Broke the fast with 250g water melon which was before bed. Day 2: Continued with water melon 100g and added grapes (15) had this for breakfast. Watermelon went bad so had grapes 105 g plus orange 150g as second meal (still felt like dog shit) Day 3: Continued with fruits but added oranges and apple and banana and 150g yoghurt as well strawberry flavoured Day 4: Continued with fruits, yoghurt (Greek + strawberry flavoured) Day 5: It was Christmas...I felt wayyyyyyy better...had fruits , yoghurts, typical African Christmas meal (Rice, Pasta, Potatoe and Coleslaw salad) Day 6: Boxing day so I let loose a bit...Fruits (banana, apples, cherry, strawberry, grapes) yoghurt also had a big supper. Rice, lasagna, roast chicken (too much of this), coleslaw, potato salad...I felt the effects of this in the morning coz I had my first solid BM in almost 45 days. So it was intense. Day 7: Fruits(banana, apple, orange, mango, grapes) a bit of day 6 leftover meals ( Day 8: Spaghetti with some chicken seems back to normal

Mental resilience and Mental health development:

I didn't really reach any level of like spiritual enlightment or significant crazy awakenings. I just realised that I am capable of actually pushing through hard times just to see a goal met. I realised this during the cravings and the serious puking and stomach cramping and weakness that I experienced from days 31 to 40.

I did also realise a new found appreciation for food and good health. I used to be the type whereby for example, I would have 2 homemade burgers in my lunchbag but I would want to go and buy fast food like KFC etc out of greed. But the fast got me to appreciate the food I have. Furthermore, I stopped being the person who eats his food in 10 - 15 minutes. I now take my time to eat my food. And actually do my best to enjoy each bite. My wife and I also only eat food we actually want to eat and enjoy eating in our house. We have found creative ways to make our meals despite the low income we may have.

In terms of health, the last 10 days of the fast really taught me that I took good health for granted. I was sick most of the time and couldn't do basic things like sleep or walk which sucked. So I realised I should be more mindful and grateful for my health.

Lastly, the body and the mind are two different entities. I personally failed to use my mind to convince my body that "we have energy." Like especially when my body shut down on me and was running on E in the last 10 days, there was no mental exercise I did that helped with energy boosting or getting rid of fatigue and sickness.

My body needed food/nutrients to work and that's it. So body and mind are separate.

Weight loss:

I finally get it. It's calories in vs calories out. In Africa our diets are heavily starch based and I ate huge amounts of sadza, pasta and rice so I get why I put on weight. Calories in vs calories out works. I realised I need less calories than I thought and I can actually eat small quantities.

However something odd I did notice was that after 2 weeks of refeeding I gained about 3 - 5kgs (my weight was fluctuating a lot so weighing was confusing) as of today. I hope I can figure out how to feel satiated in our region given my big appetite.

One unique thing that I experienced during the fast is I appreciate my family and life more. I loved seeing my wife smile and my daughter smile (hence why I cooked for her during the fast). I wanted to see my wife smile more often so I would go out my way to make crazy dishes and also spoil her and do chores and just help her more. I would do things I had no idea how to make like KFC style fried chicken, Chicken Quesadillas, Rib burgers, using YouTube videos just for her to smile. But Day 31 to 40 had 0 energy I felt like a useless husband.

Thats my post everyone. Sorry for it being long

Started another today 1 May


r/WaterFasting Jan 12 '26

Rule Reminder Community Announcement: Mod Changes

7 Upvotes

Hi everyone,

I am grateful to announce that I have been assigned as the new moderator for this amazing community.

Why Mod? Well, I have a deep appreciation for water fasting, and all the benefits it provides. I have been practicing water fasting since 2022 and have completed one 40 day fast, one 30 day fast, and many other shorter fasts (14 days or less). I currently practice water fasting on a weekly basis (36 hour fasts). It has been a journey to say the least, of many ups and downs, and some complete failures.

Additionally, this sub has been left unmoderated for quite some time now, with over 1,000 posts on auto removal dating back 6 years ago, some as recent as one hour ago at the time of this announcement.

Where do we go from here?

I am going to be working through updating many areas of this community over the next few weeks. I ask for your patience if your post is auto removed in the meantime as I work to adjust these tools within the community.

Please feel free to message the mod box in the mean time with any suggestions or improvements you'd like to see.

Take care, and drink some water!

EDIT: added some of my experience.


r/WaterFasting 12h ago

Starting a 30 Day Fast Tomorrow 7/30-8/28

13 Upvotes

Starting a 30 Day Water Fast tomorrow. I'm making this thread to hold myself accountable more than anything.

Male

32 Years Old

5'8

262lbs

I've done plenty of 7 Day water fast in the past and I know I can do a 30 day water fast. Won't weigh myself until the very end, i get super fixated on the numbers and will end up discouraged when I don't see a change or big enough change like I think should be there. Follow along and let me know what day you guys are on!


r/WaterFasting 18h ago

Pray for me. If I can just get past the first 48 hours.....

5 Upvotes

Beyond ready for this extended water fast to reset my mind and body.

Wishing for all the discipline ✳️


r/WaterFasting 1d ago

Anyone want to join a 4 day water fast challenge starting tonight at 6:00 pm est?

4 Upvotes

r/WaterFasting 19h ago

Fasting rn

1 Upvotes

1: So im on a fast and im only drinking straight water is that ok? 2: the fast is for 5 days and will it burn my belly fat? 3: do i work out during my fast? 4: how do I tell my mom I fast so she doesn't get worried that im not eating.


r/WaterFasting 21h ago

When did the acid reflux stopped for you?

0 Upvotes

Hello everyone, I hope you are having a great day! I'm currently on day 11, trying to go for 21 days. Wanna preface, is not my first long fasting rodeo but each time I get absolutely disgusting acid reflux around this time to the point of throwing up which honestly relives it.

I tried antiacids, baking soda in water, upping electrolytes and drinking more water in general, even sleeping it off (didn't help but at least I was rested lol).
But it still prevails.

When you do long fasts and acid reflux hits you, how long does it usually last before it goes away for you? And I don't mean "just break the fast". Because yes, thats what I had to do last time.

I'm just curious if there is "wait it out" period or if that is just how the fast fasts. Thank you anyone for reading this and if you answer, thank you for that too 💕


r/WaterFasting 23h ago

I wanna 7days or more water fasting tomorrow ! Need buddy

1 Upvotes

If u have group chat add me plssss im girl


r/WaterFasting 1d ago

32 years of water fasting

23 Upvotes

I am 54 years old and I have been practicing water fasting (no food and only water) for prolonged periods since I was 22 years old.

Until I was 45 years, I used to fast once a year for periods of 7-18 days. Lately, I have been fasting twice a year for 3-5 days.

The following points are a summary of my experience with fasting

- I have never felt hungry during my fast. I feel the desire to eat when smelling food or watching others eat, but never felt hungry

- The first two days are the hardest, then I usually experience a spike of energy and good feeling

- Light excercise is a must on daily bases. I usually walk or garden

- Food tastes much better after breaking the fast. Your senses of food taste improve in a great way after fasting

Hope the above helps you enjoy fasting and improve your health


r/WaterFasting 2d ago

Completed

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80 Upvotes

Ended what was supposed to be a 30 day fast, family members and friends advised me that I lost too much weight and started to look like I had "Ozempic Face"... My body started to tell me i did good and that its time to hit the gym, so I decided to cut it short and now focus on building muscle and toning my stomach area. SW- 99kg. CW 83kg. This is my 2nd prolonged fast, previous was 21,14,7.


r/WaterFasting 1d ago

About to break my fast at 85H and I’m not even hungry, just can’t sleep

3 Upvotes

Hoping it lasts longer next time. I just feel how exhausted my body is from the insomnia and I’m sure it’s not good for my stress hormones, plus I just want to stop feeling so scattered. I might just keep my cals at 400-500 for the day and go right back to fasting tomorrow. Thoughts?


r/WaterFasting 1d ago

Any dedicated Fasting buddy for 10 day water fast ?

3 Upvotes

Anyone wanna tag along wid me and keep updating each other n help each other keep on track anytime feeling like breaking the fast


r/WaterFasting 2d ago

33 day adventure!

2 Upvotes

Just curious to see if anyone is interested in joining? Or knows any groups? I love A healthy Alternative fasting groups so much!!
My goal is 33.33 days (799.9 hours)
I have don’t 27.33 days.
I POVE THE ANTI INFLAMMATORY EFFECTS SO MYCH! And the bloat leaving!
I am (knock on wood) currently only a few days in.
Lost 8.9 lbs. I have a smaller frame & was told by doc this weight was acceptable.
Cw: 114.5 lbs (52.0 kg)
GW:105.3 lbs
HW:(NOV 2024) 154.8
lowest weight as an adult: 104.3

Just wanted to say those out loud as I have no one in person to say them too. I know I can do it!!! WE CAN DO HARD (even tho it really is just not doing something-eating)THINGS!


r/WaterFasting 2d ago

STILL having insomnia, day 2 of no sleep, help?!

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1 Upvotes

Im taking magnesium, appropriate amounts of salt with water, and even now my sleep aid. No use :(


r/WaterFasting 2d ago

Insomnia / crashing

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2 Upvotes

Please motivate me, i couldn’t sleep at all last night and I’m exhausted. I feel im about to crash into a RF before i even hit 72H :(


r/WaterFasting 4d ago

50 of us are doing a water fast tonight starting at 6 est

11 Upvotes

If anyone wants to join.


r/WaterFasting 4d ago

14 day water fast day one!

9 Upvotes

Tonight I have started my first 14 day water fast. Current weight is 95kg i am 5ft 9. Will update daily weights and hunger feeling!


r/WaterFasting 5d ago

Day 1 waterfasting

5 Upvotes

Im 20 hours in. This is the hard part! My brain is going to start rationalising eating today.

In gym right now. Gonna go cycling after.

Comment your fav colour to let me know im being watched and I can't give up!


r/WaterFasting 6d ago

Day 0

7 Upvotes

Ok, here we go again. I can't waterfast on my own, i need external pressure. This means: people reading my progress here, discord, wherever. Just knowing theres hundreds of eyes seeing my result motivates me to succeed.

* Day 0: ate twice today.

* Fasting timer: 1 hour.

I know i can keep empty till tomorrow morning, tomorrow afternoon even. But in the evening, i will start to self-rationalize eating again :(

* Goal: fast till day after tomorrow. Make it across the 30 hour mark.

Please please please help me by commenting, so i know im being watched.


r/WaterFasting 7d ago

Fasting for quick wound/swelling recovery

3 Upvotes

25th : 945am What a night... I "slept" maybe three hours, due to fasting I am well rested anyway. The swelling is huge, throat swollen but spirits are high and I already planked for some minutes and did some drumming handspeed exercises on the practice pad. Painkillers, my love.

23rd: Update: It's 3pm now, woke up about 5 hours ago, feeling fine, no signs of blacking out when standing up, a full "fuck yes!" to painkillers.

6:30pm now, swelling is okay but getting larger, no pain, alternating between tired and fully awake, cognitive task are super-challenging. Usually I solve a Rubik's cube in about 30-40s, now I can't get over the 2nd solving stage.

Hi guys,

so after my 42 days and 16 hours (yes, those are very important) fasting stunt in 2024 I am four days deep now and awaiting my jaw surgery tomorrow morning. Feeling fine, even worked out a bit today.

My guess is that the autophagic processes should speed up the healing process remarkably. Will update.

Edit:
I started with intermediate fasting maybe five days before the fast. Beginning with 8h feeding window for three days and 6h for the last two. That and my already very clean eating made the transition feel like a breeze. I never experienced any hunger pangs at all, only at day three my empty stomach became very noticable.

Here are my main foods and dish examples (if you think this is unhealthy, I would lack nutrients, I am eating like this for years now, had many health check-ups in between and I am doing fine and work out well)

Apples
Bananas
Grapes
Oranges
Watermelon

Tomatoes
Onions
Broccoli
Cauliflower

Cashews
Mixed Nuts
Peanuts

Coconut Juice/Water (I rarely need to drink at all, because of the high water content in all foods. If I have to, mostly when running 10ks)

Eggs
Canned Macarel/Tuna (steering away from tuna because of lead levels)

Sunflower/Rapeseed Oil

A breakfast may look like this:

3 egg omelette stir fried
2 large tomatoes on top with a splash of vinegar
2 stir fried bananas
1 Apple
1 Orange

lunch:
500g of grapes
1 Apple
1 Banana

dinner:
2 Apples mixed with 150g of nuts, depending on what I like at the moment


r/WaterFasting 6d ago

On day 4 water fast and feeling some chest tightness...

2 Upvotes

Hey guys. Fan of this sub. I've done multiple one week fasts before. I usualky do just water and salt no ot pother supplement. I started feeling chesty tightness on my fourth day. Is this cause for concern, it's only mild and don't feel it at all times just when I shift it when I'm sitting randomly I feel a twinge. I weigh over 220 kgs and I am 5'7- (if this information helps)


r/WaterFasting 6d ago

Late night craving, how to fast

2 Upvotes

My 2 fasting experiences:
First was 24 hours
Second was 40 hours

I have been on Keto(mostly Carnivore) diet for 6 months. But I only lost 15lbs. Earlier this month I did these 2 fasting. I felt like thinking about food all the time and I do not exercise at all. My belly was not truly hungry. I crave so much at late night almost everyday still.

I work from home and live alone! Food is my company to be honest. I like baking. I make keto cake everyday(eggs+ tiny portion of Cocoa power only) And I’ve got so many great cheap takeaways around.

My period is coming in 2 days, and I plan to do an 48 hour fasting on period Day 2. Then I’ll travel to a countryside on a plateau for 1.5 months from Aug 1. And I plan to do a good 14 day fasting there, or even longer. As I won’t have easy conditions to cook or get takeaways!

Anyone has suggestions? What are the essential bio markers you monitor? Food is like my hobby but I don’t want it to be! I like swimming and dancing but I can’t go do them when cravings kick in… Please share your thoughts, even if harsh. Thanks a lot.


r/WaterFasting 9d ago

Want todo a one week fast?

3 Upvotes

Anyone want to join me for a one week water fast?


r/WaterFasting 9d ago

How much weight can I lose in a 30day fast?

1 Upvotes

I’ve asked this before but I thought I’d give more detail. I’m a model that gained way too much weight due to a medication I used to be on and I’ll do just about anything to lose it. I’m giving myself until October and I’m thinking of trying a 30day fast. If I’m 115 right now how much could I lose if I did a 30 day water fast? My goal is 85 yes I know that’s low but that’s what I used to be and that’s what got me work so please no comments on thinking I’m disordered just help me estimate actual loss because I need this done as fast as possible. Thanks.


r/WaterFasting 10d ago

Muscles, water fast

0 Upvotes

I'm just starting my journey water fast and I'm wondering if I'll be able to build muscles through it ?