Feeling light-headed after FD yesterday. Is that normal?

[Bayliss1]

As the title says...had my first FD yesterday (stuck to 500 cals) and feel light-headed this morning. Is this normal??

Normal for having not eaten enough, yes.

Have you had a massive glass of water today?

Try that, light headedness is far more likely due to dehydration than lack of food after a 500 cals fast.

500 calories is less than a 2yr old's RDA, I don't know how any sensible adult think they can survive on it.

Yes, dehydration can make your feel like that, but my bet is on your ridiculous calorie intake, or lack thereof!

Wow, what a helpful comment different you're on a thread about the 5:2 diet in case you hadn't realised

Yes OP, pretty normal in the beginning. Your body will soon get used to it and the lightheaded-ness (?) in the mornings will subside.

The 5:2 fasting diet only restricts intake for 2 days a week, differentname.

It's being followed by many sensible adults, and
very successfully by my own results.

:)

Of course I had realised. Have you not realised that an adult cannot live on 500 calories a day? I don't think there is anything wrong with pointing this out. It is another fad & dangerous diet exploiting people who want to lose weight, when there are more sensible ways of doing so.

An adult body shouldn't get used to living on less calories than a baby needs, it is stupid. As is binge eating (as you can eat as much as you like on non fast days) then dropping down to a mere 500. It is a ridiculous way to treat your body!

Well of course, theleast because you are starving your body. I dare say that a lot people would find it works. Hardly teaching god eating habits though, is it?

*good

I was being sarcastic

Of course you're entitled to your opinion, but you can't really argue with hard evidence now can you

And actually, you can't eat as much as you like on non-fast days. So you've clearly not got much of an idea about this diet at all

I agree it could be dehydration or low sugar. The diet is designed to shock your metabolism but be aware of extremes and listen to your body. If it continues seek advice from a gp.

Different I would suggest you read the book. Fasting is primarily about health benefits and disease prevention. Weight loss comes second. No adult can survive on 500 calories a day every day but that is not what we are doing. The book is actually very compelling and written by serious academics on the subject who also recognise that people with eating problems should not do this.

It's just another way of dropping calories for weight loss.

If someone needs to lose weight, the 5:2 method is more sustainable than eating a few hundred calories under what someone's body needs 7 days a week, relentlessly, for months on end. Because only short bursts of willpower are needed, rather than constant, nagging, guilt-inducing willpower.

And non-fast days are not binges. You simply eat around your Total Daily Energy Expenditure. No more, no less.

Historically, I believe it was quite normal to have periods of not eating. And it is very useful for re-setting the fat, salt and sugar sensors in the body, which can become overloaded and addicted with our Western diet.

There is some evidence that fasting itself is beneficial. This is not at the level of being accepted scientific wisdom yet, but for some it is enough that they practise 6:1 for the health benefits, if they are at their ideal weight.

I'm not starving my body at all.

It was too fat, I was abusing it with too much food and now I'm teaching my eyes and brain what enough looks like.

Please read up on the science before making sweeping statements that are unfounded

1. You can't eat as much as you like, i.e. binge, on non-fast days. It doesn't work like that.

1. Why do some people have no problem with people restricting what they eat every day (i.e. a traditional diet) but have a huge problem when people don't particularly restrict what they eat most days, and only do so on two of the days? Overall it's roughly the same calorie intake.

1. Of course adults can't live on 500 calories a day. Nobody is suggesting anyone does this.

And if you think humans have historically always eaten three square meals a day (and a load of snacks in between), you're misguided.

Hi. I'm on week 5 and have had light headedness, dizzy and grump feeling today after fasting yesterday. I have eaten lots of healthy high cal foods today like peanut butter on low GI bread, oats n milk, fruits, nuts, pitas and hummus, avocado...
I dont know how much I've lost , I don't own scales, but clothes are considerably loose around waist, butts and legs.
Is it dehydration, low salts, low blood sugars? or too quick for me at mo.
Thoughts please, thanks

well what about yom kippur or ramadan
muslims fast for a month and dont die
jews fast for 2 days straight

Littlemisskiwi
come and join the big thread

you mention lots of snack type foods but no fluids.....
you need to be drinking at least three pints of water on a fast day