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Fasting / 5:2 diet

Talk about intermittent fasting and 5:2, including what’s worked for others. Mumsnet hasn't checked the qualifications of anyone posting here. You may wish to speak to a medical professional before starting any diet.

The 5:2 Thread number 20! Officially a score.

971 replies

GreenEggsAndNichts · 20/05/2013 08:27

The continuing thread for those of us following either the 5:2 diet or the alternate-day fasting diet.

The 5:2 diet was featured on Horizon in August 2012, and essentially requires you to fast for 2 non-consecutive days per week. The other 5 days, you can eat what you like, or approximately your TDEE (see explanation below). Alternate-day fasting is just how it sounds; you fast every other day. By "fasting", we mean that we keep our calorie consumption very low, around 500 calories on average for a woman, 600 for a man, on those days.

You'll find on these threads we use a number of acronyms. If you're new to the threads, or Mumsnet in general, they might not make much sense.

WOE/WOL = Way Of Eating/Way Of Life. We use this term instead of "diet" as many of us see this as something to do in the long term.

MFP = My Fitness Pal, a website many use for keeping track of the number of calories they're eating.

TDEE = Total Daily Energy Expenditure, quantifies the number of calories you burn in a day. This measure is best estimated by scaling your Basal Metabolic Rate to your level of activity. TDEE is critical in tailoring your nutrition plan to desired fitness goals. Here is a link to a calculator to help you figure out how many calories you should be eating in a day.

ADF = Alternate-day Fasting, as it says on the tin, fasting every other day rather than 5:2.

Michael Mosley has a website to accompany his new book on the subject. Please go check them out, as he's the whole reason most of us are here!

I know a number of people lurk on this thread, as this is currently quite popular. Please just jump in and post if you're new- you'll find a lot of support here.

Here is a list of links to get you started with this way of eating. Please let us know if you find a new article or some other information online:

First things first, here are links to some of our previous threads: most recent one before that another one!

Another thread which breadandwine has started is a good resource for some of the links and tips that get lost in these big threads. In addition to sharing links, we try to condense some of our top tips for fasting there. Keep in mind, we all do this differently, so these are just tips, not rules. This might be a good place to catch up with us if you're feeling a bit lost!

frenchfancy has a recipe thread over here, please post any low-calorie recipes there so they don't get lost in these bigger threads!

If you've been at this a while and are moving on to maintaining your goal weight, there is a thread here to discuss that.

Here is the link to the BBC article regarding Michael Mosley's findings, which was featured on Horizon.

There's a link to the aforementioned Horizon programme here.

A blog post here gives some of the scientific explanation for why this way of eating helps you to not only lose weight, but improve your all-around health.

A Telegraph article which comments on the diet and gives a brief overview by Dr Mosley himself, very informative if you're just starting. (I highly recommend this for an overview)

A study discussed here gives commentary specifically addressing the effect of this diet on obese people (both men and women), with regard to both health and weight loss. ("After 8 weeks of treatment, participants had an average 12.5 lbs reduction in body weight and a 4 cm decrease in waist circumference. Total fat mass declined by about 12 lbs while lean body mass remained relatively constant.) it also mentions "Plasma adiponectin, a protein hormone that is elevated in obesity and associated with heart disease, dropped by 30%. As did LDL cholesterol (25%) and triglycerides (32%).")

Something to consider if you are currently your ideal BMI: this appears to suggest the benefits for women at a lower BMI might not be seeing the same health benefits that are found on men at their ideal BMI.

A BIG THANK YOU to all who have been contributing, btw. Most of us are learning this way of eating as we go along. All of the links above have been posted by others in our previous threads, and they've been very helpful. Sorry if I haven't given credit where it's due, but it was just enough of a job getting all the links re-copied and back into one post.

Come join us, and tell us about your experiences with this diet!

OP posts:
BetsyBell · 21/05/2013 09:24

emily I tried to remember to eat enough at breakfast so I didn't feel the need for a second breakfast with my leisurely cup of coffee - that second breakfast is never the healthiest option (toast, lashings of butter, marmalade...)

In the end I didn't eat very much (post fast so get full very quickly) but here I am reminding myself there's nothing until lunch. Normally I'd save my breakfast for after the school run, tomorrow I will - I don't get time for lunch on Wednesdays so it'll be a tasty brunch.

Hello daisy, that's absolutely normal - you may find you have a few weird side effects for the first couple of weeks but it all settles down once your body gets used to it. I do find I need a light fruit-based breakfast after a fast, anything too carby makes me feel bloated. I used to get dizzy after breaking my fast, especially if there was toast involved. Well done on a successful fast day :)

BetsyBell · 21/05/2013 09:29

makinganotherlist I don't know anything about the lemonade diet but if it keeps your intake under 500 calories then that's fine for 5:2. If you plan to do that long term then you probably need to make sure you're taking vitamin supplements on fast days.

The eating element on a fast day isn't an essential part of IF but makes it 'doable' for most people. I couldn't maintain this way of eating if I couldn't eat the small allowance but as it is I plan to do it in some form forever.

CrystalDeCanter · 21/05/2013 09:34

Morning everyone.

I'd like to join in please Grin.

I need to do something to lose this stone that seems to cling on tenaciously. I think 5:2 may be the answer. I've read through the website and will buy the book but aiming to fast Weds and Mondays. Am a bit scared that I'll collapse on fasting days (no reason why I should - just bad about dealing with hunger).

BetsyBell · 21/05/2013 09:37

crystal In 20 threads I haven't read about anyone collapsing! Keep hydrated and you'll be fine. Better than that, you'll learn to deal with hunger and not be scared of it anymore.

You might find you need 2 days between fasts to start with - I'm often hungriest on that second day which makes fasting seriously hard.

ELR · 21/05/2013 09:39

Morning all, I am back to my low from a week ago this morning so pleased with that 10st1.75 nearly in the 9's!!
Well I had my bigger breakfast 479 calories. 2 slices Vogel toast with butter and marmite. Half a banana, 4 strawberries some natural yogurt and 20g rude health granola and a cup of tea. I had the toast then took DH to station then had the yogurt and fruit so slight break inbetween of about 10minutes but needed it otherwise I wouldn't have been able to eat it.
betsy tomorrow I will have my breakfast after the school run like you as will be having a later lunch and a later dinner due to kids after school activities ect.
No snacking no snacking no snacking!!

Emilythornesbff · 21/05/2013 09:41

betsy toast and marmalade is heavenly. But best avoided as a "second breakfast" Grin you're right.

Whitecat · 21/05/2013 09:42

crystal it does seem daunting to start and it is hard to wrap your head around voluntarily doing without food but that is only because we have been conditioned all our lives that we need food and that we will go into starvation mode at the drop of a hat.

All the people successfully following this WOE are proof positive that you won't have to take to your bed on a fast day and that we can all still function perfectly well with a grumbling belly.

Take the plunge. Honestly, it's easy.

monster54 · 21/05/2013 09:47

Just a quick Q any of you ladies that are in the 9's and 8's super slim. Are you finding you having to exercise a lot along with the 5:2? I'm trying 4:3 for the next couple of weeks to try and get it moving again...

Exercise might be my next attempt...although I never stick to anything so reluctant to even try!!

PearlyGrey · 21/05/2013 09:48

Hi everyone Smile
Out of interest does anyone know how much they lost in the first week? According to my scales I've lost 2.1kg (so about 4 and a half pounds?!) which seems a lot. I've done a lot of exercise and been trying hard outside of fast days but even so that seems excessive and our scales are a bit dodgy. Does that sounds really OTT? Have a feeling I need to brave the horrible public scales at the gym...

NoForkNKnife · 21/05/2013 09:48

In sorry, I haven't caught up in the thread yet. So please don't think I'm ignoring any big news.

I had an awful day yesterday. It was FD, and I was doing fine. I had my 500cals for evening meal, and within an hour I was throwing up. I couldn't keep anything down at all, not even water. Trying to feed a newborn and throwing up in a bowl at the same time was not fun! My mum had to come and rescue me.
I think it wasn't a bug, but rather ketoacidosis. My blood suar was dangerously (should have been at hospital) high. And while the fasting hadn't caused it, I think it may have made it worse Sad.

DH did all the child are overnight and I feel almost normal this morning. Thoroughly enjoyed the toast this morning Grin.

It was just a freak incident (hasn't happened to me in over 21 years of being type 1) but it's worried me. Going to eat normally for a couple of days and put FD off until at least Thursday.

I'll go and read the thread now!

IDismyname · 21/05/2013 09:49

Thanks Greeneggs for the new thread.

I haven't posted here for a while, but tend to come and catch up on everyones news on my FDs just to keep up my motivation.

I'm losing VERY slowly, but have taken up Pilates as well as doing my usual 2x dance classes a week. The pilates is def. making a change to my tummy area.

Someone further up the thread remarked how slowly they were losing weight compared to everyone else - I think I'm averaging 1/2 pound a week for 2 FDs - however - I do feel so much better and less sluggish eating this way.

I also have a Father with dementia, and so the thought of maybe diminishing my chances of getting it, propels me along, too.

Can I also join the NO SNACKING CLUB? I need a kickup the 'whatsit' between 5 and 7pm every night...

NoForkNKnife · 21/05/2013 09:49

Oh, and I've lost the weekend weight and then some! Hope it doesn't all pile back on.

BetsyBell · 21/05/2013 09:50

ELR Same weight as me this morning! I'm pretty sure I'm not going to see the 9s again this week unless I get my running shoes on, not feeling very inspired since the sun buggered off again. Tomorrow would be a good day if I'm having a late breakfast though...

Remembered I was meant to be doing the squats challenge this morning after an 'accidental' 3 day break.

ELR · 21/05/2013 09:54

nofork sorry to hear you've been unwell. I'm not 100% sure but I think it says in the book that if you have type 1 diabetes tat 5:2 is not suitable for you. If you are breast feeding too maybe you should up the calories and spread them out a little instead of in one meal. Hope you feel better soon.

CrystalDeCanter · 21/05/2013 09:56

How long have you been doing it Whitecat? I know it's stupid but I'm honestly so used to stuffing myself the second I feel a twinge of hunger I can quite comprehend actually being voluntarily hungry.

ELR · 21/05/2013 09:56

betsy I've had a three day break from squats too I kind of remembered but brushed it out if my mind really quickly as soon ad i thought of it!!
I am going to do them right this minute!

Daisy17 · 21/05/2013 09:58

Thanks, Betsy, that's good to know, I think a lighter fruity breakfast would have suited me better, yes. Will try that next time. Feeling so enthusiastic about this, like many I'm trying to lose that extra stone and wobbly middle that never went after birth - my son is already 2!

CrystalDeCanter · 21/05/2013 09:59

Daisy that's what I need to lose and my youngest is 5 (almost 6) Blush

BetsyBell · 21/05/2013 10:00

((((NoFork)))) That's sounds horrible, hope you're feeling better now. It honestly sounds like the diabetes, BF and fasting are not a good combo. You should really consider stopping the fasting until your baby is older. You need to look after yourself x

Daisy17 · 21/05/2013 10:00

Crystal do try it - I had exactly the same worries as you and I found it way easier than I thought - even managed to survive a trip to the dentist with a toddler in tow at 5pm!

Daisy17 · 21/05/2013 10:01

Ah, but he's my ONLY, Crystal.....

EagleRiderDirk · 21/05/2013 10:03

peachy I lost 5lb in the first week and have continued to drop about 4-5lbs a week. Though I am still in the obese category!

BetsyBell · 21/05/2013 10:06

blue2 I'll be here around 4 re. snacking so you can just scroll up and read my no snacking post at 5 Wink Grin

GreenEggsAndNichts · 21/05/2013 10:15

NoFork you are fasting and you a diabetic?

Is that advised? Have you spoken to your GP?

OP posts:
NoWayNoHow · 21/05/2013 10:17

Hi all.

Can I join? I'm doing my first fast day today, and will do the 2nd on Thursday.

I'm 5'4" and 10st4.5lbs, so just within the healthy BMI range, but I've always felt more comfortable the other side of 10st and closer to 9st7lbs if possible. I've always done WW and found it to be very successful for me, but since having my gallbladder removed my digestion seems to operate completely differently (and I've also developed a wheat intolerance!) and my weight loss has slowed dramatically - net loss this year is only 4lbs which is pretty pathetic.

So, I'm hoping trying something new will help, but I've learned such good eating techniques with WW that I'm certainly going to try to stick to the same kind of healthy eating during the week and just let weekends be my down time.

I've started today with some gluten free toast with boiled egg, and am going to drink my way through gallons of decaf coffee and Rooibos tea until dinner tonight which will be grilled chicken breast with greek salad (lettuce, cherry tomatoes, cucumber, feta). Whole day (including milk with drinks) comes in at 487cals so fingers crossed I can stick to it.

I've been reading on the thread about snacking, and it does seem to make sense to avoid it on fast days if possible as (a) it's extending the time between eating, and (b) you're not using up valuable cals which could be put towards slightly more substantial breakfasts/dinner.

Any other tips/tricks would be greatly appreciated! I've already had a nose at the recipe thread which looks AMAZING!