Are you talking about eating what you want for 5 days and then fasting for 2 days?
If thats the case, to me the two days sound like hell and I would think you would just "even" out for the week.
Ive also heard it put the opposite way, diet for 5 days, eat what you want for 2 days. That would be easier but if you went crazy on your two free days, again, you would just even out. Lose then regain.
Which way are you talking about? Or is it a completely different way?

From what I looked at on the web it states to eat moderately for 5 days and for a woman eat 500 calories for to days. Doesn't say eat all you want. Men eat 600 for two days. I can eat 500 calories for two day if I can have a little pizza or etc.

I read a little about this on wikipedia. IM sure different things work for different people but this doesnt sound like something that would work for me. I learned an important lesson in fasting. If i try to go a day without eating or eating that little 1. i feel faint and 2. i tend to overeat severly at the next time i eat.

I enjoy eating throughout the day. I loook forward to having a snack and cooking dinner for my family. I just try to change things about the way i prepare dinner. I.E. instead of breading my chicken or pork, i marinate or season and cook on my george foreman grill. Thats what i love about the alli diet, i eat with confidence knowing that I am making good choices. With alli you can pretty much eat anything (the recommend staying away from fatty cuts of meat such as hamburgers and sausage). I even do have 1 slice of pizza while on this diet. I dont have to worry about weighing food or counting calories. i eat breakfast, lunch, dinner and 2 small snacks a day.

If you think it will work for you, give it a try! Does it have a calorie limit on the 5 days of eating moderately?
Counting calories, and being mindful of what I put in my mouth seems to work best for me.
Good Luck in whatever you decide to do!!

I have been doing the 5:2 Diet for about three weeks. I know it says 500 cals. for a female, but I took the 600 cals. of a male because I am a large woman. The other 5 days I do NOT "go crazy", or I would just undo the work of 2 days at 600 cals.

First few times are the hardest. I felt weak and woozy first time on 600 cals. But I'm a retiree who can be at home and lie down for a few minutes if necessary.

One day I felt horribly hungry and as if my brain wasn't getting fuel. Felt disoriented. So I ate something and re-scheduled my 600 day. That time it was fine!

You only need to do the 500 or 600 calories on two days a week. You can schedule them for your convenience. If you fail, there's always tomorrow or the next day to do it right!

Important: the 2 days of Lo-Cal should not be consecutive. Don't try to do it 2 days in a row.

I am going to weigh myself at the end of the month. I don't expect a huge loss. I am 67 years of age and have thyroid issues. But I am hoping there will be a 5 lb. loss.

Thats great. Good Luck! Keep us posted!!

Livingwater I'm with ya two days a week doesn't seem that big of a deal cause when we are on the road there are alot of days I don't eat but one day anyway. I know it is not for all but it seems easy to me. I hope. I remember when i was young I use to fast every Monday thinking your body needed a break from all the junk. strange ha.....

I am so happy to see my dear friends Living Water, Snippy, and my new friend Jena here. I am feeling stronger already.

Hi, just checking in to let you know today is another semi-fast day (600 calories). I'm hanging in there! The word seems to be spreading about the 5:2 plan. "Whatever doesn't kill ya makes ya stronger." Everybody who is trying this, keep us posted!

Do you count calories on your 5 days or how do you do the 5 days?

To answer your question, yes, I still count calories on the other 5 days. Some people can actually eat 2,000 calories--but me, I have to limit to 1700. The other 2 days are 600 for me.

I think I will start with my version.. the 6:1 diet at first. And see how that goes.
Thanks everyone for all the info.