Skip to main content

The NHS blogs on Intermittent Fasting

Interesting to see the NHS Choices blog  - which helpfully examines those science stories that hit the headlines in the light of the science - look at intermittent fasting.



It is pretty sceptical about some of the purported health benefits.

Comments

Anonymous said…
"It should be stressed that our assessment of the evidence was confined to entering a number of keywords into Google Scholar and then looking at a small number of studies which we felt would be useful to explore further.

We did not carry out a systematic review (though arguably, it would be useful for researchers to do so)."

Weak.
Unknown said…
I'd be interested whether 24h fast once a week can create solid deficit compared to twice a week...Brad Pilon says he fasts every 3 to 5 days.

It'd be also interesting to find if 2x24 approximately equals daily 16/8 or 1x24 equals 2-3x 16/8.
Unknown said…
Once a week could mean less stress and less overcompensation. It's also much easier to plan as with two days it's better to spread them out (2 fed days in between) and if you want 24h period after training and the training itself in the fed state, it doesn't give you that many options.
Henry said…
I'm not a huge proponent of IF, but I'd like to point out that the article isn't discussing true fasting. A 500 calorie day isn't a fast - you're still putting food in your body!
Anonymous said…
Since Jan 2011 I have been low carb. During that time I have refined it to higher fat less protein. All of this saw me lose 45 pounds. Then about 7 months ago I was stalled at 205 down from 250. Started eating once a day at dinner and the last ten pounds dropped off. I started IF thinking that I would lose the weight then start start eating normally again. But it is so easy that I now IF five days a week and on the weekends I eat normally. I haven't had any blood work done in about 2 years and probably need to go and have it done for giggles.
Unknown said…
You don't mean 5 straight days of fast, do you?
Anonymous said…
Yes I eat one meal a day 5 days a week...it isn't really that hard if you eat a high fat diet, moderate protein low carb diet.

DFoltz said…
>NHS choices had a lousy, skeptical, writeup.

NHSC, while perhaps the best of the "mainstream media" (if you can call it that) always has a lousy report. They tend to examine a study in isolation, as if no other studies on the subject existed, and are dismissive of anything with a sample size of less than a couple thousand, regardless of the p-value.
By their standards, this is a pretty positive review.

I'm actually surprised how much evidence they pulled together for this one!

> 500 calories isn't a fast
Well, no, but there's evidence suggesting that even alternate-day restriction is quite helpful.

Of course, I personally find compliance more difficult than with complete abstention... and that's with smart food choices. If anyone actually tries to do IF with a bowl of cornflakes in the morning, they will in fact be miserable all day, as NHSC warns.
Anonymous said…
One who pays heed to the wind will never sow And one who watches the clouds will never reap In the morning so your seed and at night do not let your hands be idle For you do not know which of the two will be successful or weather both alike will turn out well
Unknown said…
I think it possibly does more good than bad, but it's far from what they say!

Popular posts from this blog

Dry January

I mentioned a few weeks ago that I was taking part in "Dry January".  I didn't make a big song and dance about it, but I decided to go for a calendar month or so with no alcohol.  A few people have asked me about my experience, so here are a few points. Why take a break from drinking? Alcohol is an interesting topic.  As a drug it is widely accepted in society, central to so much of our socialising and leisure.  There seem to be lots of health benefits - so we are told - yet there are also a lot of problems in terms of health, relationships and lifestyle that come from drinking. Over a few years I'd begun to become aware and then concerned that I was drinking too much and too regularly.  I am in a busy and stressful job and sometimes a glass of wine after work to relax is really helpful.  But over time, one glass became two.  Two glasses became ....I might as well finish the bottle.  A habit got established....and was starting to get too e...

So where have I been?

You will have noticed that this blog has been quiet for a while....  There are a few reasons for that, reasons that I thought I'd list here: WORK -  my day job has been incredibly busy and stressful this year. Working 10-14 hour days the last thing on my mind when I got home was putting something on here.  FACEBOOK/TWITTER - I suppose I've been using other channels to do some of what I used to do here. Quick fire posts pointing to interesting studies or news etc tend to get posted to Twitter (@chrishighcock) or to the Facebook Hillfit group http://www.facebook.com/groups/263083947097000/  REASSESSMENT - I've found myself less comfortable with some of the positions I've taken in the past. Sometimes I'm embarrassed by some of the things I've promoted. I'm not Paleo or low carb. I think Tabata and intervals are misunderstood and misapplied. I cannot really claim to be HIT.   I find myselfunable  honestly to post things on here and pretend that I am some sort o...

Taking up space for a brief update

I've a couple of posts in draft that I will get up soon -  an update / reflection on Dry January and some thoughts on the scheduling benefits of short workouts if your life is busy.  Before that though, I am pointing to something else. However, I wanted to highlight something that is coming this weekend that I've been involved in.   Amber Rogers (Gokaleo and author of Taking Up Space ) has been pulling together a bundle of books from various authors with a common theme, one that I've been pushing here recently.   Keep it simple, avoid the hype, be patient, be consistent and flee the gurus.   I've talked before about how we get obsessed with pushing for more and more, when enough is OK.  I've given my view that so much of the health and fitness internet world is more like a gnostic religion than something that will benefit your life. There are other voices out there saying similar things and I'll be pointing to a bundle of books later this week ...