quality of calories question

I think you'd have to eat less than 1200 calories for two to three weeks before you get to starvation mode.

Will the higher quality foods fill you up faster to the point you could get by on 1200 calories and not be hungry? I don't think you could do it without neglecting other nutrients, and I know I couldn't do it at all.

Sort of reminds me of a question that was on my son's cartoon today: "What weighs more, 10 pounds of bananas or 10 pounds of Ah's dirty socks?"

I think Courtney has it right- that calories are calories. You get too low, your body goes into starvation mode (regardless of the nutrients in the food).

But it's not really the same, because ofcourse sugars & fat calories everything through the roof with say candy bars or whatever you may choose to oppose the quality food it will get you for sure, in diabetes all nasty deseases as oppose to eating mostly vegetables & some fruits pure ofcourse. hahaha Sorry, but when they say 210 calories for a candy bar & all it's actually about twice that if not more considering all the loaded garbage in it probably 3-4 times that insane. Huh

Maybe I should clarify what I want to accomplish. I want to do a weeks worth of almost fasting (Juicing with only fruits and vegatables) and only eat solid foods like salads, oat bran cereal, yogurt. I want to do this mostly to cleanse out my system but also enjoy the benefit of jumpstarting my weight loss.
But I'm afraid to go to low and lose energy/muscle. My current net calorie goal is 2010 without exercise but I would be hard pressed to drink/eat that many calories using the above method.

I'm not a nutritionist, but I don't see a problem with it, remember yogurt can be high in calories, just two big spoonfulls from one of those tiny containers is like 100-200 calories so a little bowl would be up to equal the 2010, but I would try & limit it to 600 calories tops then get some bran & the like for the rest also bran is high in hardyness as we all know which is very good.

Starvation mode is about calories AND quality of food. And it can be mimicked even at normal calorie levels if the quality of calories is poor.

Pretend that you're eating 1500 calories a day, but almost no protein, and you're not eating complete proteins. Even though you're eating enough calories overall, your protein levels are so low that your body has to break down protein-containing tissue (skeletal muscle, organs, cardiac muscle) for amino acids to make other cellular proteins. That's a form of starvation. But you're still getting enough carbohydrates and fat to make ATP (energy).

Now if you're eating 800 calories a day and all complete proteins, the catabolism of tissue in the body might not be as great, but eventually you will run really low on body fat so you won't be able to spare the tissue, and once again you have tissue breakdown. You don't have enough energy to make sufficient ATP, so you're breaking down everything --fat and muscle.

Neither scenario is healthy. There is no 'jumpstarting' weight loss, and there is nothing to 'cleanse'. Have you urinated or had a bowel movement today? Then congrats, your body is cleansing just fine on its own.