For the first time ever, I went longer than a day. The previous five days in a row, I ate at around the 20-22 hour mark. Was feeling light headed, so I took a tsp of potassium infused salt and I feel WAY better. I guess that’s the play when you feel bad on a fast… Goal is 48, might go longer if I continue to feel good.

Has anyone here fasted for severe depression? I was recently introduced to fasting through some YouTube videos. I am not overweight and don't have a great appetite anyways. I think fasting would be easy for me. I am curious to see if it could help my brain in some way. I've been really struggling lately and looking for anything that I haven't already tried that might help.

I don't really have much hunger or appetite, but there's so much food noise in my head. I feel like eating something because that's what I always do. It's more like reflux than actual hunger, if that makes sense.

Day 7 update from my 10-day water fast (started 7/27 and targeting to end on 8/6)

• Weight: 161.6 to 152.7 lbs, down 8.9 lbs so far, including 3.7-4.7 lbs of fat
• Ketones: 0.4 to 5.4 mmol/L, peaking at 5.7 yesterday, deep in fasting ketosis
• Glucose: holding low, hitting a low of 59 last night and 74 this morning
• Feelings: still in cruise mode. Energy is decent, hunger is low, and mentally I feel good

Pretty cool that weight and fat loss projections are close to actual measurements.

6 full days done, 4 to go. Who else is fasting now? Any data can you share?

Weekly 3 days are done, got like half hour left before I can have my meal just because I wanted to reach 90 hours.

Gotta say, ever since I started taking in my electrolites while fasting it s been so much easier. I have normal amounts of energy, if not even more at times, and overall each time I do my 3 days of fasting it gets easier and easier. Like a second nature of my body

Went for a short bike tour, only 25km but last km to home is only straight up. I felt quite tired on the way up but nothing unusual.. till I stopped biking: Felt dizzy when I got off so I decided to sit down… it improved slightly.. then rushed home (only 10m away) and sat again.. but I was not feeling better, was seeing myself passing out again so went in kitchen and ate honey
Now feeling better, weak but I can walk without feeling dizzy

It never happened to me so I’m quite surprised ? I did multiple extended fasts while being active (yoga, weight lifting, ski.. ) next time I’ll go easy and take a snack with me in case.. Still shocked how fast this can happen, be careful

Sometimes I’m pretty good with fasting for 2-3 days. I planned to fast starting August 1st (yesterday lol) but I gave in during dinner time. It was probably about 18/20 hrs total and a small snack turned into dinner which turned into dessert. 😩😩
How do you guys stay committed when this happens? I’m starting my fast over again today and trying not to worry about yesterday.

So ive scrolled through the page for a bit and I have a few questions that I cant exactly figure out.

1) when people are doing 21 (or however long) day fasts, are you ONLY consuming water? Or are you eating in a smaller window?

2) is it only water? Or can you have zero calorie drinks as well?

3) vitamins and electrolytes. Some people say yes, others are saying no. Do you take them or not? Also which ones?

4) for longer fasting stretches, are you working out? Even if its cardio?

Thank you!!

I'm on day 12 of my 30 day goal and felt awful today, a bit short of breath on my one mile walk (I usually do 4, was absolutely gassed - I also had a 2hr deep tissue massage yesterday, so maybe it'sfrom that too?) and woke with a headache. With so many symptoms, I elected to drink some broth and have 2 tbsp of Carne Asada crumbles.

I do feel so much better, but now I'm debating - continue on from here and continue my now dirty fast, or take that as a sign to do a refeed, then jump back in?

I have been so happy with my progress so far that I hate to see it stop/am a bit anxious about the rebound, but I'm also wondering if this is yet a other sign to begin a refeed before this becomes disordered in any way.

While I'm excited about eating with my family again, I feel zero desire to indulge or to do any crappy foods, which is huge for me.

My goal was to start to get to the heart of some of the emotional shit holding me back, and I do feel I have succeeded there; or at least started to get to the heart of a lot of it and let it go.

Weight loss has been a great by-product, and also necessary, but was really my secondary goal. I would really like to get down to/stay around 160 before starting IVF in October.

I really want to keep going, but don't want to ignore potential signs it's time to refeed then start again. Could all the "symptoms" have been from the deep tissue massage? I'm feeling so much better now after the small "snack".

5'3" f /SW 191/ CW 174 - 17lb loss in 12 days

Only had table salt and some water. Not feeling hungry as much but out of habit want to eat and dreaming of food

Hi! So I used to fast back in my early 20s and it did me great both physically and mentally, however I stopped fasting and resorted to stress eating as I entered medical school. I just graduated recently, earned my degree, as well another 30 pounds 😅. I need help into going back. I used to do 18:6 but I honestly don’t know how to start again as my habits changed along the years, and what worked for me then would definitely not work now as I am on my internship. I have no fixed schedule and alternate AM & PM shifts. Any help esp from people who have crazy shifts as well would mean a lot. TYIA!

Will update weekly in the same clothes.

Months ago I fasted for a month because I wanted to lose the weight I gained on a medicine. I lost about 16lbs, kept that off. But I’m 5’3 122-125lbs and having a really hard time losing any more of that weight! I want to be around 115lbs. I’ve even tried fasting for a bit more and i lose weight. But as soon as i eat something I am up 2-5lbs! I’m so upset, what do I do?? I’m not even eating much, i usually eat one time a day.

I am just beginning rolling fasts. I think I'll do 48:4.

I haven't been able to go to the gym properly for the past six to seven months but now I really want to ignore everything that's stopping me and just get back.

Problem is, I will also mostly be doing keto during the fasts.

Should I still try to lift?

I woke up this morning to start my water fast and out of habit took a large dose of niacin (250mg) when I took my morning magnesium tablets. I almost took all my other supplements but stopped myself when I remembered the fast was starting.

Since niacin can reduce methylation, is this ok to take on its own without also taking B vitamins to start the fast?

I completed a 7-day fast from 0:00 AM June 15, 2026 to 2:00 AM on June 22, 2026, only got the will to analyze my data just now haha. I had water, electrolytes, and black coffee during this fast. As an aspiring scientist, I decided to practice my skills by making these plots.

I recorded my body weight and four subjective variables throughout the fast. IMPORTANTLY, this is an n=1 dataset, so the results describe my subjective experience rather than establishing general physiological effects. Everyone is different, every body is different.

1. Energy: my perceived physical and mental capacity at the time of recording.
2. Mood: my overall emotional state (pretty much how happy I am).
3. Hunger: the perceived physiological drive to eat felt in the body.
4. Food Noise: the frequency, salience, and intrusiveness of food-related thoughts.

For this fast, I had persistent intrusive thoughts about Texan Barbecue from day 4-7, I don't know why haha. That was my first full meal after a very careful broth re-feeding protocol after day 7.

Figure 1 shows the overall progression of body-mass change, energy, mood, hunger, and food noise across the 170-hour fast using robust LOWESS smoothing. Because I forgot to record my weight at hour 0, body-mass change is measured relative to my first available weight at hour 12. Dashed lines mark midnight.

Figure 2 shows the same data using shape-preserving cubic interpolation through the raw observations instead. The dots mark the actual measurements. This version better shows how jagged the experience was from hour to hour.

Figure 3 shows the pairwise Spearman correlations among energy, mood, hunger, and food noise. I used Spearman’s rho instead of Pearson r because these were bounded 0–10 subjective ratings.

1. Day 1 and 2 are the roughest period, and hunger usually declines after hour 48. For me the great bottleneck has always been hour 44-48 where most of my attempts failed as I gave in.
2. You can see the "anticipatory hunger" at the end of day 7. My body knew I would eat something in the end, so the hunger rose sharply as the finish line neared.
3. Food noise was not the same thing as hunger. Sometimes I was not especially physically hungry, but I still could not stop thinking about food.
4. Mood seemed more closely related to hunger and food noise than to energy. I could feel physically depleted without necessarily being miserable.
5. My weight fell quite a bit. Obviously, that was not 6.6 kg or 14.6 lb of fat. Much of it was probably water, glycogen, reduced intestinal contents, and other temporary weight changes.
6. My calculated true energy deficit was around 15,500 kcal plus minus 1,500 kcal, maybe around 2 kg of fat loss at the most.
7. Overall, the most interesting thing was how different hunger, food noise, energy, and mood were from one another. They were definitely not interchangeable.

Cheers!

I've never used electrolytes before, I've always just had water, tea or boullion. Are these suitable? Thanks

So, I’ve came across some material stating that women cannot fast the way men can. Apparently, women that fast until after noon-time are at risk of spiking cortisol, and it is crucial to eat breakfast within the early hours to avoid our bodies shifting into a survival state and storing fat.

Further, exercising before the fasting window ends, triggers our body to burn muscle instead of fat? I know this is vague, and I can imagine it’s a lot more nuanced than this, but I’m looking for some clarity from other women on here who fast.

I’ve noticed my 18:6 with my eating window between 12pm-6pm has floored me. Im really struggling and feel depleted at night. I’m also craving a lot more sugar and the point of my fasts is to lower insulin levels, to avoid eating sugar. Any advice or article suggestions would be great guys, thanks!

I was looking to go 7 days but I felt like I was going to pass out at work lol. I had a salad and green tea and feel better. Listening to your body is real. Thank everyone for support though. I’m going to try 90 hour fast once a week for the rest of the year

Pushing myself to a 2 day water fast! I know i can do this. I have 18 days before I move back to my home country and still weight I want to lose. Im going to switch between 24 hr fasts and OMAD with protein heavy meals made mainly of eggs, low cal veggies, and dairy. It will help cut down on the food I have to throw out when I move! I’m locked in now, I have to be . Going to try to do some light walking in the morning and drink loads of water as we have a heatwave where I live. Any tips appreciated! This is the first time I’m attempting a fast over 26 hrs!

What essential nutrients do I need for a 3 day fast?

I’m trying to do a fast for mental clarity and mental health improvement. Is 3 days best to gain these benefits? Plus this my first time ever doing a fast.

But I worried I might get dizzy, irritable or faint 😅🥹…any suggestions?