Joe Friel's book..."Fast after 50"...arrived today. So far a very good read. Interestingly, there's a whole section on switching over to a diet with much less carbohydrate and more fat when you get into your 50's and beyond. It seems we get more sensitive to carbohydrates as we get older. It gave me encouragement to keep going with it. Joe Friel himself went on this sort of diet when he turned 50. He said he felt awful for 3 weeks but then transitioned over and felt terrific. I'll keep on.
A good review of the book by Andrew Read can be read here.