<human>: Summarize the given text in a few sentences.

Hey lose it!  

Quick overview: age 23, 5'7", 177 down to 169 pounds.

I've been wanting to start a legit diet and have officially gotten the motivation and drive to do it!  I started on Thursday of last week and as of today I have lost 7 pounds.  I'm working on cutting fat to get a more lean physique.  I'm naturally pretty muscular and would really like to work on weight loss.  I'm concerned about my caloric intake though, I'm averaging about 700 calories daily.  My diet consists of coffee for breakfast, an apple for lunch, and a pulled pork lettuce wrap for dinner (with a few glasses of green tea through out the day)

From the posts I've read people are saying I should look out for 'starvation mode'.  Quite frankly I don't feel hungry usually and have been seeing great results (even had a cheat day on Saturday [chili dog w/ no bun and onion rings]). Every night before bed I've been going on a brisk 2 mile walk to meditate and burn off any excess calories before hitting the hay.

I'm in ketosis while dieting.  Any thing I should know or things that I could do to improve weight loss while retaining lean muscle?
<bot>: I've been eating a healthy 700 calories a day, feel great but am afraid of muscle deterioration based off what I've read.  I'm 5'7" 177 down to 169 since Thursday.