Wow!! I've not eaten butter for *decades*. I've almost cut out bread, potatoes, pasta. My bread is home made brown flour, husband hasn't acquired a taste for brown rice or pasta so I only eat potato a couple of times a seek, rice and pasta maybe a couple of times a month, home made museli maybe once or twice a week, but that would've been porridge made with water till now (but will be reverting again now we've lost the heat). I lose about half a pound a year on this diet, in fact I'm now only a stone heavier than I was 33 years having been as much as 11st at my heaviest (very pleased women today are allowed to 'eat for two' in pregnancy', took me 20 years to get back to where I am now). Have used olive oil spreads since butter was labelled 'bad', long before T2 arrived in my life. Does it work? Well, it does if you wwnt eeight loss by the gram, but not in measurable amounts, no. But way back as an an active young mum with no car (still no car) walking what felt like hours a week and I lost no weight whether I ate salad all summer or casseroles and roasts all winter and still lost no weight nor put it on, I'm not sure what works. Husband would love to eat butter, he doesn't like cream, and he refuses low fst cheese, but he has been obese since a small boy as has his brother and one sister. Their dad was obese post war but his war position suggests as a young man he must've been standard weight, though broad. Husband has shed 20kg in 18 months, more to go, that's on how we eat post gis diagnosis. Only something like amounts of milk and cheese is individual. Main meals are cooked as shared. Its working for him. And he definitely needed to shift his weight: he has since aged *nine*!! No, I didn't know him then but we were at identical school types with some mutual friends (in hindsight), our diets were pretty much the same for the 1950s/60s.