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AIBU?

Share your dilemmas and get honest opinions from other Mumsnetters.

Intermittent Fasting is miserable

204 replies

Slowontheup · 21/01/2025 09:42

Why would you spend half your waking hours feeling dizzy and sick with zero energy.

opt out of breakfast, the best meal of the day.

or, opt for a life that couldn't include eating dinner in a restaurant.

I don't get it but every health thing says to do it. Does it actually work (I don't need to lose weight anyway just health driven)

how long until it's bearable?

OP posts:
Semiramide · 21/01/2025 15:26

The success of IF isn't solely determined by the length of the fasting window and the number of calories consumed.

Yes, if you fast you may consume fewer calories. But the composition of the calories matters a great deal.

Lots of vegetables/fibre, moderate amounts of protein, some healthy fats and dairy. No unhealthy additions such as UPF, sugar and alcohol.

Plus exercise, especially weights/resistance. That's it really.

Twatalert · 21/01/2025 15:27

Lilifer · 21/01/2025 15:22

I don't calorie count and I'm not obsessed with what I eat, on the contrary I used to obsess about what I ate because I found it hard to control my sugar intake. Doing 16:8 has got rid of my cravings, I eat what I want but I eat more mindfully and prefer protein rich foods, and just generally more health y food overall, just because you fast for a period every day does not automatically mean you are obsessing about or controlling your food intake, I just don't think about food until lunchtime rolls around, that's very freeing

Exactly my experience. When people on these weight loss injections talk about 'food noise' being gone.... this is exactly what happened to me with IF. Also, I realised a bit of hunger isn't so bad and I am not going to suddenly collapse. I used to panic as soon as I got hungry about what I am going to eat next, how much and what it would mean for my daily calorie intake. Now I realise the hunger doesn't really become very strong and often subsides again.

onwards2025 · 21/01/2025 15:29

I find it liberating, just goes to show how everyone is different.

I like the element of control and that it literally takes food off the table for me for a longer period, don't find it an issue to stick to at all.

16/8hrs here. I have a light lunch sometime 1-3pm and then dinner in evening.

TooManyChristmasCards · 21/01/2025 15:31

IChoseThisCyclone · 21/01/2025 15:09

OP, I don't get it either - fasting is not for me. I'm most baffled by people's reports of mental clarity while fasting as I have the opposite. I can't concentrate on work if my body isn't fuelled. I was in a rush at the weekend and didn't end up eating til nearly 2pm and honestly didn't feel safe to drive! It's no good for me.

I was on the low-carb threads here years ago and slowly the subject of fasting crept into them (it's all in separate topics now). All the talk of how long posters could go without food drove me off them, it became a thing to go for longer and longer with no food at all.

Well, I have a history of eating disorders. The posts on here about people going 24/36 + hours without food feel terrifying to me. It seems like so many women eat so very, very little and that surviving off a tiny amount of food is considered imperative for menopausal women, except then that extends to peri-menopausal women; the goal posts are forever shifting.

When I was growing up, trying to last without food for as long as possible was a danger sign; now it's become part of wellness culture and is supposed to be so healthy. I remind myself that I personally need to prioritise bone health and building muscle over depriving my body of food for long periods. I recognise my own history of disordered eating affects how I read the posts - and the way I'm drawn to them like a moth to a flame reminds me that however hard I work on recovery, I'll always be fascinated by threads like these, like pressing on a bruise. It is scary though to read Mumsnet sometimes; you come away thinking that an adult woman should eat a tiny number of calories and very infrequently.

Edited

At the same time, my mum in a way, but my grand-mother surely naturally didn't eat that much and that often.

We have a culture pushing snacks on children as soon as they are out of the bottle. People worry if their toddler doesn't have 3 snacks break between breakfast and lunch. It's too much, and too often but we get used to it.

There are day when I haven't eaten anything until 4 or 5pm. I go for a jog in the morning, but then rush in the shower, rush at work, don't even think about food frankly, and then I get hungry in the afternoon. Then I .. eat? Because I eat enough on average, I am not hungry and I function just as well. Most people in my office are the same, there's always someone shouting after 3pm, "forgot to it today, shit, I am starving, I am getting some food". Male or female.
It's not healthy, but no one is feeling deprived either.

Lilifer · 21/01/2025 15:36

"I used to panic as soon as I got hungry about what I am going to eat next, how much and what it would mean for my daily calorie intake. Now I realise the hunger doesn't really become very strong and often subsides again."

@Twatalert yes me too! The awful hunger pangs energy dips headaches and calorie counting is gone. I wish I had discovered this years ago, it takes all the effort out of weight control and I have a very sedentary office job so by rights I should have to eat a very small amount but I don't, I have a small lunch and a very substantial dinner, plus tea and a chocolate bar around 9pm and that's me done till 1.30pm or 2pm next day - even on days when I'm not at work and more active in the morning it's not a problem. Granted I'm not doing running or other heavy cardio excercise so maybe would be a bit harder if I was

Delatron · 21/01/2025 15:58

It’s not particularly healthy to go for a run in the morning, not eat before, then not refuel or eat anything after until 4/5pm.

You need to replenish energy stores and eat for muscles to repair/recover. It’s not something anybody in the health industry would recommend. Just because you feel ok doing it doesn’t mean it’s healthy.

IChoseThisCyclone · 21/01/2025 16:05

TooManyChristmasCards · 21/01/2025 15:31

At the same time, my mum in a way, but my grand-mother surely naturally didn't eat that much and that often.

We have a culture pushing snacks on children as soon as they are out of the bottle. People worry if their toddler doesn't have 3 snacks break between breakfast and lunch. It's too much, and too often but we get used to it.

There are day when I haven't eaten anything until 4 or 5pm. I go for a jog in the morning, but then rush in the shower, rush at work, don't even think about food frankly, and then I get hungry in the afternoon. Then I .. eat? Because I eat enough on average, I am not hungry and I function just as well. Most people in my office are the same, there's always someone shouting after 3pm, "forgot to it today, shit, I am starving, I am getting some food". Male or female.
It's not healthy, but no one is feeling deprived either.

My mother and grandmother didn't exist in a culture of eating 'naturally' and in accordance with the body's rhythms. They grew up in the oppressive diet culture that advised women to smoke a cigarette instead of eating or do the cabbage soup diet. There have been unhealthy and damaging restrictions placed on what and how women should eat and look for decades. How my grandmother ate, and was advised to eat, shouldn't be a template for anyone.

PeopleLikeColdplay · 21/01/2025 16:14

It really does have massive health benefits. I have an auto immune disease. I can literally see the difference in my inflammation levels if I do intermittent fasting, because the swelling is significantly better. When I eat too much in a day, I'll wake up the next day puffy and sore all over.

Pablova · 21/01/2025 16:19

It works for me, I’ve never had an appetite in the morning, I need a couple of hours of activity before I feel hungry.
My stomach feels very uncomfortable and bloated if I eat throughout the day.
An eating window of 8 to 10 hrs gives my digestion a chance to recover and I enjoy my next meal much more.

Pablova · 21/01/2025 16:27

anonymous98 · 21/01/2025 12:09

YANBU. Re-marketed eating disorder.

I get my recommended daily calories but
just eat them in a shorter time frame than spread across the day.
My dinner tonight will be carb and fat loaded and I’ll have a calorie loaded dessert too.
IF does not mean less calories.

Delatron · 21/01/2025 16:32

Pablova · 21/01/2025 16:27

I get my recommended daily calories but
just eat them in a shorter time frame than spread across the day.
My dinner tonight will be carb and fat loaded and I’ll have a calorie loaded dessert too.
IF does not mean less calories.

It’s just a different way of eating. I’ll have a healthy, protein packed breakfast to fuel my activity for the day. I’ll eat less for dinner and definitely won’t have a calorie loaded dessert.

MadameSzyszkoBohusz · 21/01/2025 16:34

It’s funny how different mindsets work, isn’t it? I feel healthier if I eat a good breakfast, I feel like I’m looking after my body if I start my day with some protein, plants and healthy fats, and maybe some slow-release carbs. I feel nourished and ready for the day.

Pablova · 21/01/2025 16:46

Delatron · 21/01/2025 16:32

It’s just a different way of eating. I’ll have a healthy, protein packed breakfast to fuel my activity for the day. I’ll eat less for dinner and definitely won’t have a calorie loaded dessert.

Yes I know, I was addressing the poster who said IF was an eating disorder. It’s not.

anonymous98 · 21/01/2025 16:54

It can be disordered.

Darker · 21/01/2025 16:57

I think the real villain in many diets is ultra-processed foods. Our bodies can cope with small amounts, but when we are grazing and/or eating on the go it’s often the snacky treats we reach for. The croissant at the train stay, the biscuit plate at work.

Aliflowers · 21/01/2025 17:06

Sharptonguedwoman · 21/01/2025 10:00

How is that enough calories for health though?

In my case I don’t eat breakfast. Light lunch is maybe 400 cals. Sandwich, soup and roll. I have a normal dinner. So steak & chips, lasagna, roast. This could be 800-1000 cals. Coffee and a snack. Boom 1600 calories which is what I aim for daily.

I’ve been doing it for the last few years. I’m rarely hungry before 12m and aim to eat lunch about 1/2pm then dinner and finish for the day by 8/9pm. I’m not so regimented about it that I can’t enjoy dinner with friends and I’ve never dizzy or sick because I didn’t eat breakfast

Wonderwall23 · 21/01/2025 17:11

It's not something I would want or need to do, and I too would feel ill if I skipped a meal. I'm very slim though and feel I need to eat regularly to function.

Having said this, I naturally do fast to a degree, just by personal preference (I would never deliberately fast). I generally have breakfast at 8am, have eaten all my lunch by 12pm and have dinner by 5pm. If I'm hungry later on I'll eat something but often I'm not so on those days I do actually pretty much have a 15 hour fast. I go to bed very early so I think that makes a difference.

Delatron · 21/01/2025 17:14

I don’t quite get the eating a massive dinner part (and then going to bed where you don’t burn the calories). Versus having a decent breakfast to fuel the day’s activities and then eating less in the evening.

Front loading the day makes more sense to me. Each to their own though.

Aliflowers · 21/01/2025 17:23

@Delatron im the opposite in that not eating breakfast suits me. I naturally (before IF was ever a thing) ate somewhat like this. I can’t stomach food before a certain time and am rarely hungry in the morning. Whereas in the evening I could eat the leg off a scabby horse. IF for me is following my body’s natural rhythm in a more structured way.

Semiramide · 21/01/2025 17:28

This is my typical IF day:

  • after my 60-75 minute workout, around 10.30, I have a 2 egg omelet plus some salad or leftover vegetables; or salad with tuna or feta or boiled eggs.
  • at some point in the afternoon I have an apple or some melon.
  • plus a boiled egg or a bit of cheese if I'm hungry.
  • dinner between 6 and 7.30 is usually fish or chicken with lots of vegetables; sometimes also a cup of lentils or quinoa.
As I'm quite old, I need fewer calories than when I was younger - roughly around 1400-1600. Though I don't actually count anymore.

2 or 3 times a week I may have a dessert, some chocolate or a glass (or 2) of wine. I'm never hungry and I don't feel deprived.

superplumb · 21/01/2025 17:34

I eat dinner early. 530 latest. Unless I'm going out. Then nothing until the following morning. It's so bad then having a late breakfast as opposed to skipping it altogether.

GoldVermillion · 21/01/2025 17:35

Mine is really achievable. I don't eat before lunch or after tea/supper/dinner. I have a cup of tea with a splash of milk instead of breakfast. I didn't get hungry, sick or dizzy.

If it's a special occasion - like a meal out- I just join in.

PeopleLikeColdplay · 21/01/2025 17:42

Aliflowers · 21/01/2025 17:23

@Delatron im the opposite in that not eating breakfast suits me. I naturally (before IF was ever a thing) ate somewhat like this. I can’t stomach food before a certain time and am rarely hungry in the morning. Whereas in the evening I could eat the leg off a scabby horse. IF for me is following my body’s natural rhythm in a more structured way.

Same for me. I can't face food when I've just woken up, but I would also eat a cankerous horse limb as a midnight snack.

TwistedWonder · 21/01/2025 17:50

I don’t eat breakfast
A latte at 11
Soup and a banana about 12.30
Dinner between 5-6
Light snack just before 7
Bed about midnight

Katypp · 21/01/2025 17:52

I do intermittent fasting but all I do is cut calories down to 800 twice a week and eat fairly normally the rest of the week. I don't bother with time windows and always have breakfast.
My fast day yesterday was a bagel thin, cheese spread and chopped tomato for breakfast, hm vegetable soup for lunch and hm chicken tagine with a little couscous for dinner. Bedtime was hot chocolate made with skimmed milk, dark chocolate flakes and a small blob of squirty cream.
Friday's fast day menu will be hm banana pancakes with cherries and Yoghurt for breakfast, spicy tomato and pepper soup for lunch and coconut and lentil curry with rice for dinner.
I enjoy it. I am a keen cook do relish the challenge of making foods fit into my allowance.