1) For as long as I can remember, I've had a fairly low appetite. I love food — cooking it, eating it, savoring it — but if it's not in front of me, I can easily forget about it. In high school, it wasn't uncommon for me to make it through a whole day without realizing I'd only had half a sandwich and a handful of M&Ms to eat. I'm living on my own and cooking my own meals now, but without predetermined family meal times, I'm struggling with portion control and meal planning. So many resources say that I should just "trust my body" when it comes to my diet, but my body won't tell me what it needs! Some days I feel like I'm packing too much food for lunch; other days, I completely forget about lunch altogether. How can I make sure I don't accidentally become a chronic under eater — or overcompensate and eat too much? When and how much should I be eating?

2) Lots of people worry about overeating. I have the opposite problem. I just don't get hungry. Some days I'll realize it's 10 pm and I haven't eaten anything in 24 hours, but I don't feel any need to have food. (At this point I'll usually make myself eat something).

I maintain a healthy weight, but I'm sure this habit of forgetting to eat isn't good. Do you have any advice for boosting appetite?

So I was in the store and I noticed a container of crumbled Gorgonzola cheese labeled "gluten-free." I thought all cheese was gluten-free. Do some cheese contain gluten or is this a marketing ploy?

My friend recently bought a water filter. It's purpose is to raise the tap water's pH-level to alkaline level. She claims that alkaline water is good for our bodies because it reduces the acid level in our bodies. Is it true that waters with high alkaline (pH) level are really healthy for the human body? She paid $1000 for this water filter. Is it worth it? Please let me know soon if it's actually good for me, I'm thinking of purchasing one.

Is chocolate bad for you?

A few years ago I became allergic to seafood and shellfish. I miss eating seafood. Are there alternatives or remedies?

I am a wrestler and have very great ambitions within the sport. I lift weights for five to six hours a day, making sure I perform every set to failure often including negatives as well. In addition to working each muscle group two times a week, I make sure to give each muscle group 48 to 72 hours of rest. Recently though, I have learned that training longer than an hour a day can have a catabolic (muscle breakdown) effect on your body. This was very concerning to me because muscle-wasting during my training seems truly counter-productive, but I am also aware that a decrease in training may lead to muscle atrophy and that also poses a deep concern. I have also learned that cardio and even sleep can have a catabolic effect. I will have to cut my training time eventually due to time restrictions during the season because of school day and team practices, including traveling time and homework. I am posing a couple of questions within this letter: 1) Can I reduce the volume of my routine to about an hour and still make gains that are comparable or better to those I experience with my five to six hour workouts and if so, how? 2) Is catabolism truly a legitimate matter to be concerned with?

I've been told that every two to three weeks, I need to change my weight training routine or else my body will become too accustomed to it and I will stop seeing results. Is it really necessary for me to change my entire routine, or do I only need to increase weight and/or repetitions?

I know how important it is to get plenty of fruits and vegetables in one's diet, but I've been finding it difficult ever since I moved out to do so. I live by myself, on a fixed income, and I can only grocery shop once a week. Whenever I buy fruits and vegetables, they end up going bad three or four days after I buy them, and I feel like I've wasted them. Do you have any advice on cheap, vitamin-rich fruits or vegetables that keep for a good long time? Thanks!

My friends and I disagree — can you settle the dispute? I feel a calorie is a calorie no matter what time of day that you eat it. They say that if you eat all of your calories early in the day, that it is less fattening, because you will be moving around burning off those calories. I say that if you eat 1800 calories a day, it doesn't matter if you eat them in five meals or ten meals, it is still 1800 calories. I believe that the idea of not eating anything after 7 p.m. helps you to lose weight because you cut out the high calorie, high fat foods that are often eaten late in the evening. They say that by not eating after 7 p.m., you lose weight because you're not moving to burn off those calories. Please settle the dispute. Thanks.

My husband and I are having a debate over the value of liposuction as a means to permanent fat removal. He has read that we are born with specific number of fat cells and therefore believes liposuction has the ability to reduce the number, resulting in permanent fat loss in the areas that are surgically treated. I differ in the belief that fat loss and its permanency depends on maintaining and correcting diet that is related to metabolism. I also maintain that there is no such thing as permanent fat loss from liposuction. Have you an answer to our debate?

When cooking and you have leftovers, should they be put in the refrigerator while hot? Or should you cool them first?

I have a weird problem that happened to me once when I was maybe 8 years old (I'm 20 now). I woke up one morning and all dairy products tasted horrible. They tasted as though they had gone bad. I'm not sure how long it lasted back then because I just stopped eating all dairy products for a couple of years — I was afraid they would taste bad, but it definitely lasted several months. When I started to have them again they tasted fine. It seems to have started again. What could possibly be the cause of this?

Hot yoga is becoming more popular every day but there is a lot of conflicting information regarding benefits versus injuries. Most of the information does not quote sources and is therefore is difficult to follow up on. It has unquestionably helped me become a more flexible person but there is a lot of information on the net regarding horrific injuries including slipped discs, muscle tears, neck injuries, emotional problems, and even strokes. Is there a research-based, or at least a factual breakdown on the health benefits of stretching at temperatures above body temperature versus the injury risk of exercising at temperatures above body temperature?

I was bulimic for about four or five months and went from 5'6.5" at 115 pounds to 95 pounds. I have not told anyone, and will not, so please don't ask me to, but I am back up to 110 to 112 pounds and pretty much graze throughout the day so I don't throw up. I mostly snack on white bread, fruit, potatoes, and cereal in large portions, but want to stop and eat a healthy, more balanced diet. The problem is, I am not sure what a healthy weight should be. Charts say I am too skinny, but I don't believe it because I know girls in the media are thinner than me and they seem fine. I want to be as small a weight as possible without being unhealthy. I skipped my period for three months but did get it in January. I have not lost any weight since then though, and I should have gotten my period about a week ago but didn't. I don't understand, it is so confusing, can you help me?

I'm an athlete, and about a year ago, I purchased one of those ab rollers. One time, I was going through the motions and I experienced an orgasm. Now, it happens about every time I use it. I thought it was extremely weird, but then read where women experience orgasms through lots of things. I was just wondering how it is possible for those feelings to happen just by working out my abs. Also, what are some other weird ways that women have had orgasms? Thanks so much.

If you freeze yogurt does it kill the active cultures, the good bacteria?

Despite medication, diet control, and exercise, I still have a ratio problem regarding HDL/LDL. What foods would you suggest to boost HDL, while reducing LDL?

I've been trying to diet for over two years. My goal is to lose about 25 pounds, but the most I've been able to get is 15, and I can hardly keep it off. I concentrate on eating very little and since exercise is so hard to keep up, I pretty much starve myself to death. I manage to maintain the weight for a month, and then I lose control again. I've been thinking about the various diet products in the market, such as diet teas, herbs, meal- substitution shakes, and other medical products. I'd like to know what kind of side-effects they have, and how effective they are. (Some boast a seven-day plan, but that seems hardly believable.) Also, I'd like to know how well-researched the information is on these products (i.e., are they long-term enough to cover all the side-effects?) As for aspartame, is it really harmless, or is it just not researched yet?

1) What's the deal with monosodium glutamate (MSG)? What exactly is it, and how bad is it for you really?

2) I have recently been told I have a strong intolerance to MSG. But I am having trouble in working out what it is in. Is there any chance you could give me a list of items of food in which MSG is present in? I would be extremely grateful for any help.