How many calories does it take to lose one pound?

I have heard that if you exercise/work out in the morning before you eat breakfast that it will cause your metabolism to increase throughout the day, helping you to burn calories. Is this true?

I'm a college student and also a bodybuilder. I've become aware of very high protein intake amongst bodybuilders at my gym. I'm skeptical as to consuming as much protein (around 225 grams) a day like the bodybuilders at my gym do. Do bodybuilders need more protein? And if so, how much more?

I once read an article stating the soy products (espcially soy milk) can lead to impotence within males if taken to a high degree. I go through random bouts in my life where I cut out cow milk completely and drink just soy milk for long periods of time (not because I'm lactose intolerant but for argued health benefits). I'm just wondering whether drinking strictly soy milk every day (at least 3 10-oz. glasses for me) is overkill.

I was anorexic for three years and I have been in recovery for two. At the moment, I am doing well. I have a healthy weight, I eat a balanced diet, I work out regularly though not excessively, and I feel good. However, I haven't had my period in about three years now. I had been told it would come back once I reached a healthy weight, but so far, no deal, even though I've been at this weight for over a year now.

Before I became anorexic, I did get my period regularly. I am 23 years old. I am taking a calcium supplement daily to prevent osteoporosis, but I would feel more comfortable if I did get my period again. What is going on? How worried should I be? Should I go see a doctor? What can I do about this?

Is it really true that fasting can help purge the body of toxins? Is fasting safe? I find all kinds of contradictory information about this on the web.

Thanks for your help.

Is it true that taking those Emergen-C packets or any other vitamin supplements can effect the effectiveness of your birth control pill?

Is it bad for you to drink hard water? Can the calcium in hard water be absorbed by your body and would this be good for you, like the calcium in milk?

Does altitude affect calorie-burning? That is, if I do the exact same workout twice — once in New York City and once in Colorado — will I burn more calories at the high altitude? What things DO affect how many calories you burn in a workout?

I have a problem with food. I hate it and never know what I want to eat. Sometimes I'll be famished to the point of shaking, and I'll just lie there thinking about what to put into my body, sometimes for hours. I know I should eat something, and I really am hungry, but at the same time, nothing appeals to me. Is this a form of anorexia? Or could it be a symptom of stress, depression, etc.? I would really appreciate it if you could help me.

I've heard of body suits that increase sweating during exercise. Then I heard that Saran wrap had the same effect. I want to shed pounds but first I wanted to know if wrapping plastic wrap around the stomach helps burn fat during exercise.

My boyfriend says that he doesn't enjoy oral sex with me because of the taste. He says it's too strong. I have had 2 pap smears in the last year and my doctors say everything is fine and tell me not to douche. I need to do something. This has caused a lot of problems in our sexual relationship. Can my diet or anything else help this problem?

I know antibiotics can lower the effectiveness of birth control, but can probiotics or prebiotics, such as a floral acidophilus FOS, also decrease effectiveness? I've been taking birth control pills for the past 10 years with no scares or baby bumps, and I don't want to wake up pregnant one day because I took a capsule that's supposed to be healthy! :)

Does cooking in a cast iron skillet supply any iron to your system? My husband and I have a disagreement.

Do "fat burners" really work? If so, why? If not, why not?

A friend of mine and I were disagreeing about this point and I thought maybe you could help. I have heard that it is not possible to both lose fat and build muscle mass simultaneously: ideally, a person should do cardiovascular exercise with dieting to lose extra body fat, and then start to focus on building up muscle mass. He says it's possible to both burn fat and build up muscle over the same period of time. Which is the case?

I was wondering if you could offer any advice as to how to keep from getting that miserable full feeling after eating a big holiday meal. Are there any food combinations it would be best to avoid to keep you from feeling so miserable?