I will be honest with you, the fact that you are trying to help is great, but we have a lot of highly educated fitness experts in the field, myself being one of them, and we can see the problems in the diet advice, but we can also see why it worked.
For example, if you are eating low carb, you NEED fat, and so for example, 2 egg whites, will give you zero energy (ok, gluconeogensis, I know I know, but thats like 10g of protein) , and you will start burning off lean muscle, and your metabolism will slip. If you are eating 15 grams of carbs per day, you are going to have a negative glycogen intake, and so doing any kind of intense cardio, will burn muscle right off of you, heart rate should be limited to 120bpm, honestly. Also, that was about 14 lbs of water in the first week, trust me. Dave Palumbo has a fantastic low carb diet with good advice on how to use it.
It is great that you lost weight though, and I can see why, but don't give fitness advice if you have no education in the field. Like how many people have you personally trained? What certificates or degrees do you have? How long have you maintained a six pack? How many fitness competitions have you won? Things like that. I am not trying to attack you, but come on, you could screw someone up having them running and eating just egg whites and a piece of toast all day.
Cool?