I have heard that the main reason why diet drinks, like a diet soda, can be bad on a diet, is that it can spike insulin levels and then your body expects sugar that it does not get. I have taken to the habit of only occasionally having diet drinks with meals, so that any increase in insulin is actually met with food in my system. My question is whether or not this is a good/workable strategy, or whether a diet soda is a diet soda no matter when you drink it and is therefore always a bad idea. Thank you for your time.

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?

Is it possible to lose all body fat? Should you eliminate all fat from your diet?

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?

Is wheatgrass as good as it's claimed to be? I have headaches when I drink it. Why is that??? Thank you very much.

I have noticed that whenever I eat certain sugary foods — especially chocolates and hard candies — I break out into a cold sweat and feel extremely uncomfortable for about half an hour. I have no problem, however, with pure cane sugar (when I drink coffee or tea, for example). Is this a normal adrenaline reaction to sugar, or a certain type of sugar?

1) What about avocados? I know they don't contain any cholesterol, but they are high in fat so I have avoided them. Now, however, I am reading that the kind of fat they do contain may be useful in lowering cholesterol. Do you have any further information on this?

2) I love avocados and have heard that the different varieties have different health benefits and some are less fattening than others. Please can you tell me about different varieties and which are best.

I know it's necessary to have a certain amount of fat in your diet, but occasionally I hear about "good fat" and "bad fat." What is the difference? Is that the same as saturated/unsaturated? What foods have "good fat"? Can I tell by looking at the nutrition label on a food product which kind of fat I'm eating?

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.

Why do people find fatty or sugary foods comforting? I mean, what is it in these types of foods that causes the body / mind to see this type of food as comforting or pleasurable? Surely from the point of view of the body, it prefers foods that are high in nutrients — so why do people who turn to food for comfort always turn to fatty or sugary foods that don't offer the body anything? just wondering??? and I hope that made sense because I'm sorry it's quite badly worded!

Is chocolate bad for you?

Why is margarine better than butter when margarine is just oil that is hydrogenated, which means that extra hydrogen atoms are added to oil (liquid) to make it firm? If oil is hydrogenated into butter, there would be no difference between butter and margarine because they would both be saturated fats with single bonds and the same number of hydrogen atoms. Is margarine really better than butter?

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

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?

Does banana have fat like avocados or olives? If so, what kind of fat does a banana have? Thanks.

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