question about fasting

Starvation mode is a myth.

To fast, I would plan the fast and not go over or under. Read up on Intermittent Fasting. I have done the 16/8 variation in the past - very easy to follow.

"oh well I've already blown it so why not have more."
Nothing wrong with social occasions but this approach is dangerous so you need to stop it, really. It's like if you get a burst tyre on your car, you then think "screw it I might as well slash the other 3 tyres".

Or you drop your phone and get a chip in the corner so you take a hammer to it.

I am new to MFP, been with the program for 10 days. I guess I am not quiet as disciplined as I though I could be because I exceeded my calories by 2170 on Saturday. It was a social occasion followed by a "oh well I've already blown it so why not have more." The next day I fasted as long as I could then had some soup so my calorie intake was 220. When I completed my entry for the day a popup from MFP said something to the effect that that few calories could put me in starvation mode. I understand that if i were to continue eating that way that that could happen.
So, my question is would fasting(semi) one day a week cause me to go in starvation mode?

Instead of one day a week I would just do a solid fast for 3 days to 1 week. The main benefit behind a fast is to clean out your system. Did you know most people, especially those that are overweight, can have on average about 20 lbs of toxic sludge built up in their intestines? If you start off with a solid fast then you'll clean out your system and it will be primed for a nonstop healthy diet. You wouldn't have to fast 1 day a week. And after this initial fast you wouldn't have to for a long time (most people usually do a yearly fast). But you need to ease into it. The first day cut out meats, dairy, cheese and only do veggies, grains, fruit, juice and water. The second day cut out grains and veggies. The third day cut out fruit and you'll just be on juice and water ONLY. then on day 6 bring back veggies and grains and fruit. Day 7 bring back meats, dairy and cheese. And then you're good to go. Also while you're fasting make sure you drink at least 1-2 gallons of water a day and if you need to, you can take a fiber supplement to fight hunger oains.. And when you workout don't slack up just because you're fasting. Stick with the same workout length and intensity to keep that muscle building. Although you might lose a little muscle during the fast it won't take you but a month or two to get it back which is no big deal. I hope this helps!!

I'm attempting a 16/8 fast myself but honestly that is a much more natural eating habit for me I'm not a morning eater I'd rather have a cup of coffee and stare zombie like at the screen for a few hours if the option is presented, the option not being available doesn't change my view on morning eating it just removes the coffee from the equation.

I am new to MFP, been with the program for 10 days. I guess I am not quiet as disciplined as I though I could be because I exceeded my calories by 2170 on Saturday. It was a social occasion followed by a "oh well I've already blown it so why not have more." The next day I fasted as long as I could then had some soup so my calorie intake was 220. When I completed my entry for the day a popup from MFP said something to the effect that that few calories could put me in starvation mode. I understand that if i were to continue eating that way that that could happen.
So, my question is would fasting(semi) one day a week cause me to go in starvation mode?

Instead of one day a week I would just do a solid fast for 3 days to 1 week. The main benefit behind a fast is to clean out your system. Did you know most people, especially those that are overweight, can have on average about 20 lbs of toxic sludge built up in their intestines? If you start off with a solid fast then you'll clean out your system and it will be primed for a nonstop healthy diet. You wouldn't have to fast 1 day a week. And after this initial fast you wouldn't have to for a long time (most people usually do a yearly fast). But you need to ease into it. The first day cut out meats, dairy, cheese and only do veggies, grains, fruit, juice and water. The second day cut out grains and veggies. The third day cut out fruit and you'll just be on juice and water ONLY. then on day 6 bring back veggies and grains and fruit. Day 7 bring back meats, dairy and cheese. And then you're good to go. Also while you're fasting make sure you drink at least 1-2 gallons of water a day and if you need to, you can take a fiber supplement to fight hunger oains.. And when you workout don't slack up just because you're fasting. Stick with the same workout length and intensity to keep that muscle building. Although you might lose a little muscle during the fast it won't take you but a month or two to get it back which is no big deal. I hope this helps!!

Your body does not build toxins or have toxic sludge; if you did, you would be hospitalized for an infection of your system. Fasting will not improve that by any means either. Fasting is just another technique to help create a deficit and fit into ones lifestyle over a period of time. It's highly effective for those who do not like breakfast or those who want to eat more calories on the weekend.

OP, there are many programs that include fasting for periods of time. This will allow you to spread out calories over a weeks period of time to help mitigate some of the binges/splurging.

No, you won't go into starvation mode. Starvation doesn't make you gain weight, anyway. People who starve have many physical problems, but weight gain isn't one of them. It isn't a healthy thing, though. That isn't the sort of lifestyle change you really want to make.

The toxic stuff in your intestines is supposed to be there. That's why it's held in a tube, separated from the rest of you. Your body knows what it is doing there and requires no help from you. The only cleansing your digestive system needs is a good to other brushing and washing the *kitten*. It can do the rest. If it can't, you need a doctor, not a fast or a cleanse.