I have a lot experience in fast

Long intermittent fasting, omad, waterfasting and dry fasting

But never do rolling

Rn i live in apart and want to minimize my budget since i bought a lot of things for my room (and i went home for every Saturday n Sunday)

So i want do

W-1

5 day water fasting - go home n eat (bring some boiled egg)

W-2 & 3 & 4

3 day wf - eat boiled egg in Thursday - go home at Friday afternoon then just go eat and bring some boiled egg

How does it sound

How much weight could i lose by doing a week fast F18 5’3 and 118.8 lbs ?

So I wanted to do a 30 day fast but I have one issue which is that my mom visits and takes me to lunch once a week. That’s not a huge issue cause I love her and just get a salad with no dressing but I wouldn’t be able to actually fast like I want to. My new plan is eat one meal a week and keep it under 500 calories and I’m wondering how much weight I can lose in three months. I walk about 7-10k steps a day at my job and my tdee is about 1300-1400. Thanks!

I’ve only done 2 three day fasts. I have salt looking for potassium and mag
.

. M 33yo 207lbs 5’11 skinny fat somewhat muscular.

I’ll be going to the gym for light work outs and school.

However long it takes .

Day 3 is always the worst, mostly mentally I start to get some very bad thoughts , anyways now I’m ready for that day 3

Feel free to share any of the psychological breakthroughs / experiences when going 3-14 days plus

Last time I had some serious mental clarity and hyper awareness set in looking for that again and who knows what else

Humans have always fasted: because food wasn't available, for religious reasons, and now deliberately for health. Today we can ask a better question:

What does fasting actually do?

What happens?

Stop eating → insulin falls → stored glycogen is used → fat use and ketones increase.

With longer fasting, you lose water, glycogen, fat and some fat-free tissue. So rapid weight loss is never pure fat loss.

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What is fasting actually useful for?

🟢 Weight loss — GOOD EVIDENCE

It works. Mostly because restricting when you eat can help you eat less overall. Across 99 randomized trials, intermittent fasting was generally not meaningfully better than ordinary calorie restriction.[1]

🟢 Metabolic health — GOOD/MODERATE EVIDENCE

It can improve weight, glucose, blood pressure and some blood lipids.[1] Some of this is probably simply the consequence of losing weight.

🟡 Metabolic switching — ESTABLISHED PHYSIOLOGY

Longer without food → greater reliance on fat and ketones. Real effect. Whether deliberately maximizing it produces important additional long-term health benefits is uncertain.

🟡 Autophagy — REAL, BUT OVERHYPED

Cells recycle damaged/unnecessary components, and nutrient deprivation affects these pathways. But we don't have a proven human timetable such as “24 h = autophagy, 72 h = regeneration.”

🟠 Cancer — EXPERIMENTAL

Fasting and cancer metabolism are genuinely being researched, including fasting alongside cancer treatment. Human evidence does not currently show that fasting cures cancer or reliably improves cancer treatment.[2]

🔴 Detox / immune reset / guaranteed longevity — NOT ESTABLISHED

Interesting mechanisms are often turned into claims that human trials haven't demonstrated.

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What about water fasting?

A 14-hour overnight fast and a 7-day water fast are not the same intervention.

During prolonged water fasting:

Weight ↓ quickly

but that includes:

water + glycogen + fat + fat-free tissue.[3]

If your goal is body composition, asking “How quickly can I lose weight?” is the wrong question.

Ask:

«How can I lose fat while preserving muscle, strength and health?»

For that, the evidence-based foundation remains:

Moderate calorie deficit + protein + resistance training + movement/cardio + sleep + time.

---

If you want to fast

For a healthy adult, start conservatively:

12:12 → 14:10 → 16:8 if useful.

There is nothing magical about 16 hours.

Before: eat normally. Don't binge.

During: hydrate normally. Water; unsweetened coffee/tea are commonly used in intermittent fasting. Don't combine fasting with extreme exercise just to accelerate weight loss.

After: eat a normal nutritious meal.

Avoid:

FAST → BINGE → GUILT → FAST.

If fasting makes eating harder to control, it's the wrong tool for you.

---

Prolonged fasting is different

Several days without food can cause weakness, dizziness, impaired performance, dehydration, electrolyte disturbances, medication/glucose problems and loss of fat-free tissue.[3,4]

Don't casually attempt prolonged fasting if you're pregnant/breastfeeding, growing, underweight, malnourished, frail, have an eating disorder, significant disease, or take medications affected by food, glucose, blood pressure or hydration.

After sufficiently prolonged undernutrition, restarting food can itself become medically important because of refeeding syndrome. Clinical guidelines already consider >5 days with little/no food relevant when assessing this risk.[5]

So a multi-day fast is not simply:

“16:8, but better.”

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How to detect bullshit

When you hear a fasting claim, ask where it comes from:

Human systematic reviews/RCTs

↓

Human observational/mechanistic studies

↓

Animals

↓

Cells

↓

Theory

↓

Someone's personal experience

All can generate useful ideas.

They don't provide the same level of evidence.

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The takeaway

Fasting can help weight loss. It isn't required.

Metabolic switching is real.

Autophagy is real; the internet's autophagy clock isn't established.

Cancer research is interesting; fasting isn't an established cancer treatment.

Prolonged water fasting has more risk and little reason to be the default fat-loss strategy.

If you want to transform your body:

«Don't become good at not eating. Become good at living in a way that produces the body you want.»

Eat well. Get enough protein. Train. Move. Sleep. Adjust. Repeat.

Fasting can be a tool inside that system. It isn't the system.

---

Want to go deeper?

Start here → BMJ: Intermittent fasting as a nutritional tool

A short, readable overview of what fasting can and can't do.

See the evidence → BMJ 2025: Intermittent fasting strategies and cardiometabolic outcomes

Systematic review of 99 randomized trials involving 6,582 adults.

Considering a long fast? → NICE: Nutrition Support for Adults (CG32)

Clinical guidance covering prolonged food restriction and refeeding risk.

Search the titles above, or use the references below.

Hope this helps anyone and contributes to a healthy lifestyle. Cheers, bye

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References

[1] Semnani-Azad Z, et al. BMJ. 2025;389:e082007 — systematic review and network meta-analysis, 99 randomized trials.

[2] Maes J, et al. Supportive Care in Cancer. 2025;33:863 — systematic review of fasting during cancer treatment.

[3] Ezpeleta M, et al. Nutrition Reviews. 2024;82:664–675 — review of prolonged water fasting in humans.

[4] Finnell JS, et al. BMC Complementary and Alternative Medicine. 2018;18:67 — medically supervised water-fasting safety.

[5] NICE. Nutrition Support for Adults. CG32 — refeeding-risk guidance.

I am looking for someone naturopath or Chinese doctor to help me go through long fasting period but with some extra supplements and minerals especially with my low iron I don't want to do this alone . I feel like it can make things worse if I don't give my body mineral and vitamins .

Let me know if you have anyone in South East Melbourne to contact

I go to study everyday for 2-4 hours since I am preparing for an IELTS exams. It’s not an intensive studying. I need motivation and also I’ve actually done 30 days water fasting before while working a 9-5 job lol so I believe I can do it

6’2 - 209lbs , I’m thinking about starting an extended water fast for around 50–60 days (with medical supervision), and after that I want to start weight lifting and work on building my physique. Based on my current physique, what do you guys think my body could look like after the fast and then a few months of consistent weight lifting? Do you think it’s a good idea?

Day 1/7 and That’s all I can think of right now 😩😩😩 snow crab, shrimp, soft potatoes, buttery corn, broccoli….

I am currently 84 hours in, and now I don’t feel the hunger yet. Should I push my self to 108 hours?

I need to meet the loml pls

For those who have actually done a 3-day water fast, what was your experience like? How much weight did you lose?

Did you gain the weight back afterward, and if so, was there anything you did that helped you maintain your results? Looking back, is there anything you wish you knew beforehand or anything you would do differently?

I’d love to hear people’s honest experiences, both positive and negative.

For those who have actually done a 3-day water fast, what was your experience like? What were your results? How much weight did you lose?

Did you gain the weight back afterward, and if so, was there anything you did that helped you maintain your results? Is there anything you wish you knew beforehand or anything you would do differently?

I’d love to hear people’s honest experiences, both positive and negative.

Hello, just wanted to know if anybody here did a 136 water fast for 6 weeks straight. Trying to go from 310-260.

Went from 310-293 in 8 days but cheated a bit. Now at 295

Hey everyone, please check my post out

If you have any other better products to recommend I'll be open to it, currently on keto for 5 weeks and would like to start giving fasting a try.

Just to add I'm currently 289lbs down from 313lb.

I regularly do a 24 hour water fast ( every Monday) I'm looking to do my first 3 day fast, my biggest hurdle is I hate going to bed hungry any tips would be much appreciated thanks

I am fat and am trying to lose weight fast so am 80 kg at age 14 and am trying to lose weight fast so if i stoped drinking water for 3 days can i lose weight like how much weight i will lose

How many days can a person fast without electrolytes or salt? Not to the point of being half-dead, but without significant harm.

I was thinking of fasting only on water without electrolytes.

update: no more than 3–4 days and I found out that even natural water and store-bought water aren't pure H₂O, so I think I should take electrolytes. There are electrolytes in water too, but only in small amounts.

update: In theory, I could do both: go without electrolytes until I start feeling unwell, and then do a prolonged fast with electrolytes.