We are very close friends with another couple. The other DH is 6'5" so he can carry a lot of weight. He lost a couple of stone a few years ago following a heart scare, using a calorie controlled diet 1800 cals per day.
He has regained most of that over the last 18 months and is now following a shake/soup diet plan of 800 calories a day for the next 6 weeks or so. I said to his wife when she told me that 800 cals seems ridiculously low for someone his size to follow for 6 weeks, I can't see how he'd have the energy to do anything. She said she is very worried about it but he won't talk about it and is going ahead. I said I'd ask for opinions on here.
Thoughts?