I hope you weren't saying that sarcastically. This young woman has worked very hard over the last three years to slim down to a very nice size, after being over 200 lbs. since her middle teens.
She didn't go on a diet, she changed her lifestyle. I have no doubt ten years from now, she'll be just as slim as she is now.
I wasn't, or not very much anyway. Like I said, I've been there and done that. I understand the hard work part, believe me.
I've been overweight since early grade school, I'm 52 now, with the exception of several losing & gaining episodes. At least 8 cycles of the yo-yo, often, about every other time, rising higher than the previous high weight
So no, I wasn't being sarcastic, but just saying that reaching your weight goal is only the first, and usually easiest step. Each failure makes the next attempt that much harder too, so encourage her, so she never has that first failure. I truly wish her well.