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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 25- One year on from Dr Mosley's Horizon ep!

962 replies

GreenEggsAndNichts · 05/08/2013 16:28

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.

NFD = Non fast day

NSV = Non scale victory

Michael Mosley has a website to accompany his 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:

All our previous threads can be found by browsing through our very own fasting section of the site.

Another thread which breadandwine has started is a good resource for some of the tips and links 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. 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.

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

OP posts:
yecartmannew · 19/08/2013 09:11

Hi everyone

Not too bad a week last week although I did find fasting harder as I had eaten so much the week before.

Out for a meal for SIL's birthday tonight (Monday is usually a FD) so will fast tomorrow. It will probably be a bit harder (always is after a crappy dinner the night before) but hey-ho.

yecartmannew · 19/08/2013 09:16

Oh, forgot to mention

The one side effect I do get that doesn't seem to be going away is nausea on FD's.

I do 0 calorie (except for about 6 teas or coffees with a splash of ss milk) for 36 to 40 hours (dinner the night before to either breakfast or lunch the day after) and do get waves of nausea several times during the fast.

They dissapear quite quickly, and I havn't actually vomited, but they don't seem to be lessening as I had hoped.

According to some of the hard core fasting sites (40 day fasts etc) it is a sign that the liver is clearing out all the toxins. I am choosing to believe they are right Wink

Gilbertus · 19/08/2013 09:33

Fd today. First since last monday. Hoping it will curb death wish eating that I seem to have had this weekend. Just finished TOM which lasted 7 days (usually 3) so thinking weird hormonal stuff going on which affected appetite. Tea and lo cal squash all day until 5 is the plan.

MelanieCheeks · 19/08/2013 10:52

FD here too. Must drink less alcohol the night before FDs.

Actually, I get through FDs with very little difficulty these days (she says, tempting fate), but I really need to show more restraint on the other 5 days.

I've got a bag of too-big clothes to leave at the charity shop during my lunch hour, some absorbing work to keep me busy, and a zumba class this evening. Not sure about dinner, but possibly something based on a tin of tuna.

MrsFlorrick · 19/08/2013 10:55

Thanks everyone. You have made me feel less Blush

Sadly I did gain a lot of weight just by having one bad day. 3 lbs 1 oz to be exact. (Weeps).

So back up to 170lbs this morning exactly.

So Angry at myself. At this rate I will always be fat.

Not broken my fast yet but will in 10mins or so. I am having 4 rashers of grilled bacon with oven toasted (no oil) cherry tomatoes and chestnut mushrooms. 202 cals total.

Also discovered light soya milk. 22cals per 100 ml so I can have my homemade nspresso latte with only 22 cals rather than 70. Given I drink 2 or 3 a day over a week that will save me over 1000 cals!!! That's a whole days worth of food almost. Yikes. Perhaps coffee is making me fat??

postmanpatscat · 19/08/2013 11:29

koko milk is nice and also lower in cals than real milk.

MrsFlorrick · 19/08/2013 11:39

Postmanpatscat. Thank you. I will have a look at that one on my next shop.

Breadandwine · 19/08/2013 11:47

MrsF once you get into the routine of regular fasting, any indulgent weekend's weight gain is very quickly lost. I've put on 5lbs over a weekend - and lost it all after a second fast on the Wednesday.

It's all akin to what our ancestors used to do - feast and famine, etc.

So please don't be disheartened! 5:2 works!

Imflabulous · 19/08/2013 11:59

Im hoping to start this today, but was wondering if i fast from 12pm today untill 12pm tomorrow would that work? Even tho i have eaten today?

The idea being have breakfast or brunch of the fast day start at lunchtime, dinner at about 7pm and no breakfast next day and fast ends in time for lunch.

Tortoiseonthehalfshell · 19/08/2013 12:02

MrsF, yesterday (eating day), before dinner, I was 62.5kg. After dinner I was 64kg. Today (FD) before dinner I was 62.5kg again. Tomorrow morning I will be 62kg.

It is perfectly possible to put on, and lose, 3lb over a day!

MrsFlorrick · 19/08/2013 12:04

Breadandwine. Thank you. Thanks

I know it works. I have only done one proper (sort of) fast day at 660cals. Otherwise I have just done 16:8 and a couple of days at 1000 cals during a week.

However I am upset at undoing so much good work in 1 measly day. And it was mostly crappy food I don't even particularly like. Even more upsetting!!

If it was a heap of quality chocolate then I wouldn't mind as much Grin

Tortoiseonthehalfshell · 19/08/2013 12:04

I'mflabulous - no, sorry. A fast day is really closer to 36 hours than 24. You eat dinner as normal on Monday (or any given day), then eat only 500 calories between waking and sleeping on Tuesday, then breakfast as normal on Wednesday.

Imflabulous · 19/08/2013 12:09

Ah ok, well i will start tomorrow then, thank you.

also what is 16:8? I have been reading through loads of these threads on the 5:2 and this keeps coming up and not see an explanation altho prob missed it!

EagleRiderDirk · 19/08/2013 12:11

Imflabuous What tortoise said really. If you wanted an equivalent you would need to start fasting at 12pm Monday then not eat until gone midnight on (what will then be) Wednesday.

Though I have seen a q&a with MM where he suggests the 24hr fast as an alternative, but with the large caveat that the weight loss will be very slow not least because you won't have the same level of calorie restriction and the health benefits will be less.

EagleRiderDirk · 19/08/2013 12:12

16:8 is a different form of IF - where you fast for 16hrs and only eat within an 8hr window.

Imflabulous · 19/08/2013 12:14

Thank you for explaining.

classifiedinformation · 19/08/2013 12:14

I am on my first ever fast day and have decided to split my 500 calories between breakfast and dinner until I am more used to fasting. I Have read that having the whole 500 cal in one meal is best, but I'm not sure I'm ready for that yet!

I am having my first struggle watching my DS eat his lunch. My stomach is starting to grumble at me, I've had a cup of tea (with skimmed milk) which did help a bit. How do you deal with the hunger pangs when you first start?

classifiedinformation · 19/08/2013 12:25

I read that you can eat at whatever meal time is best for you, not just the evening meal. I know that in the book I read (sorry can't remember which one) the author found it easier to just eat breakfast and nothing else until the next day.

I know that me eating twice isn't ideal, but the book did say needs must until you are used to fasting if needs be. Is that ok....worried after reading the replies to I'mflabulous. Although my friend splits her calories into two meals and she has lost lots of weight.

EagleRiderDirk · 19/08/2013 12:42

classified it doesn't really matter how or when you eat your 500 calories, but the label 'fast day' is what is misleading. Its really a limitation to 500 calories within 36hrs. You eat normally day 1, go to sleep, have 500 calories day 2, go to sleep, eat normally day 3. Having a breakfast day 1, then using up 500 calories up until lunch on day 2, then having lunch doesn't have the same effect. however there are health benefits to fasting 16hrs plus which a lot us combine. My OH splits currently, and he eats his day 'backwards' in that he has a large brekkie, a small lunch then a cupasoup for dinner and he doesn't ever really get a 16hr window but is still losing. I am one of those fast for 24 hrs and eat your calories in one hit people, because that's what I find easiest.

classifiedinformation · 19/08/2013 13:14

So in reality you should really only have food for dinner on your fast days? My problem is I tend to get nauseous if I don't eat at least something for breakfast.

I am going to have to toughen up. Does having breakfast today mean I should not eat until tomorrow dinner? I'm not sure I understand exactly, because it does matter when you eat your 500 cals otherwise you don't get the 36 hours.

When I say I had breakfast it was under 200 calories and I intend to have salad leaves and a small portion of tuna for dinner, after which I will be going out for my daily swim and then eating normally tomorrow. Iam confused, think I must be a bit stupid lol.

yecartmannew · 19/08/2013 15:07

Hi classified

Don't worry, you are not stupid, however the only "rule" of 5:2 is simple:

Between your last meal (ususally tea/dinner) the day before the fast, and your first meal (usually breakfast) the day after the fast you eat and drink no more than 500 calories (if you are a woman)

Some people split the 500 calories into 3 or 2 meals (breakfast, lunch, dinner or lunch, dinner) and some people save them all for one meal (it doesnt matter which one but most people seem to prefer dinner.

If you are only interested in the weight loss aspect you can split them however you like.

If you want to maximise the potential health benefits then it seems the longer the period with no calories the better, this can either be before the first fast day meal (so better to forego breakfast and possibly lunch) or after (so better to forego possibly lunch and dinner).

Once you get the hang of the basic idea you can tweak it however you want.

southeastdweller · 19/08/2013 16:34

Not in the right frame of mind to fast today so will fast tomorrow instead. Felt grumpy and stupidly sorry for myself all day due to lack of funds and no holiday this year?boo bloody hoo. Hopefully a gym session now will sort me out, as well as pay day this week and the bank holiday weekend coming up.

How's everyone else doing?

EagleRiderDirk · 19/08/2013 16:44

yay, totally bargainous trip out. popped into a charity shop and found a lovely feeling pair of jeans for £4. brand was one I didn't recognise so I googled it and discovered these jeans retail new at £130+. not a bad days work!

classified if you feel you need to split your 500 cals then do so. like yecartman says, if you're interested in the health benefits then try to get a longer period of no food in. I know a couple of people who eat all their 500 at breakfast and then go through to breakfast the next day as that suits them far better. it as really as simple as you want it to be Grin

classifiedinformation · 19/08/2013 17:13

Would anaemia make you feel worse on a fast day?

changeforthebetter · 19/08/2013 17:54

Second fast day - a day out at a kids' attraction with copious amounts of buns, cake and local ice cream Hmm

However,just before leaving I decided to fish out the digital scales - 11stShock That has bucked up my motivation.

Have had 5 tsps of hummus and need to plan food for tonightbuta bit light-headed.