I honestly wouldn't say anything. I've learned people are going to do what they want to do no matter what you say. However if she asks for help.. or expresses curiosity on how to lose weight, then is a good time to add your two cents. That's MY two cents on the matter haha.

I wouldn't say anything, and if I was your friend, I wouldn't appreciate the advice (no matter how helpful) if I didn't ask for it. But ultimately, you know your friend better than we do, so do what you think is best.

i wouldn't say anything. most likely, she won't be able to stick to that diet for more than a few days...and even if she CAN (unlikely)- her body will start to tell her pretty soon that she needs to eat other foods. there are people who live off far less for a lot longer who do fine...so i don't think she'll necessarily be hurt by the diet.

i have one friend who did the master cleanse for a LONG time (over a month)- and then of course, gained it all back!!!

I guess I won't say anything about it then unless she asks me.

I'm on a vegetarian diet, but before I got into the balanced one with MRC, I did kind of just a regular fruit and veggie like this one and lost a lot in like a month. Then I just knew it wasn't something I was going to stick with so I went to get help with it. I would just let her figure it out on her own, unless she seems like she's not healthy when you're around her. I don't like unsolicited advice, I usually just roll my eyes and say "I've got it under control." Soo, yeah... I wouldn't say anything unless you see evidence that it poses a risk to her health. I struggle with this with my skinny best friend who's gained like 50 pounds in the last year eating fast food every day, do I give her diet advice when I see her upset over not being able to fit into her old jeans... or do I keep quiet? It's hard.

Depending on what kids of fruits and vegetables she's eating, and how much, she could actually be getting all the nutrition she needs. You can get protein and plant-based healthy fats from vegetables, and fruits and veggies are very filling. I'm not saying you're wrong to worry, but I wouldn't say anything unless she specifically asks or if she says anything about feeling ill because of her diet. What looks weird to you might look perfectly normal to others.

I would have never learned HOW to lose weight if I hadn't tried and failed on my own. Never listened to anyone saying "count calories" until I tried the pills and the fads. Came to my decision by trial and error. You may lose a friend if you stick your nose in...

sometimes people are contented with their weight so it's better for them to realize what makes them happy

if however it's something that bothers and affects other people then it's time to speak up