I am a vegetarian and frequently feel like it takes a long time to "wake up" in the morning and some days I feel like I never quite get there. I can't help but think this may be diet related. I went to a doctor for a test for anemia which was negative and I always try to get a good nights' sleep (six to eight hours). In the past I have tried to gain weight and failed miserably. I remain a little underweight but get a good deal of exercise each day. Any ideas?

Is carbohydrate transformed into fat in the body?

1) What are your thoughts regarding the use of Splenda as a sugar substitute? I have heard that the body is not able to metabolize this and that it is excreted through the urine. Do you have any current research on Splenda and the side effects? I realize it is a relatively new product. Thank you!

2) I searched the archives and found no information on Splenda or sucralose. Lately, it seems like Splenda is gaining popularity in the crowded sugar-substitute category. It seems too good to be true — measures cup for cup like sugar, you can bake with it and mix it into drinks, and it is made from sugar so it really tastes like sugar. My two questions are... is this a safe product, or are there some disadvantages with the product? And secondly, if it is very safe and versatile, why aren't more companies using it now?

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?

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.