I wouldn't worry about it, look what Atkins has done for my hair.
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j/k

I've found I have a reduced appetite as well. Before dieting it was no big deal for me to eat two Big Macs and a super-size fry for lunch and then still have a couple of those frozen Chicken Cordon Blues for dinner.

Alas that seems like so long ago even though it was only December. Now-a-days I feel full or even over-full just from drinking my water. (Which I never drank before.)

The key I have found for me is to make sure I eat breakfast. I never used to and now that's a way for me to get a good third of my calories in for the day.

Today I had a double Moch Danish. Tasty, yet not overfilling (until I dumped my water on it.)