I really didn't believe that dubious science in Trust Me I'm a Doctor regarding artificial sweetners.
Whitewave my DH was prediabetic and we've been following a low carb diet for almost a year now. I follow it too though my blood glucose has always been normal and my weight is fine too but I think it only fair that I'm not asking him to do it alone.
His latest tests showed everything within the normal range and this includes a drop in cholesterol levels even though he's eating more fats (not huge amounts but still more than previously). He's lost two stone and is walking at least 10,000 a day because he feels so much better - loads more energy.
This isn't Atkins. We simply cut out sugary things like fruit juice and limit ourselves to one piece of fruit a day, but plenty of vegetables, especially brassicas, onions, leeks, mushrooms, salads etc and we do eat some carb-rich ones such as peas, sweet potatoes, peppers, carrots, parsnips, tomatoes, beetroot, etc but in moderate amounts. Nuts and cheese are our snacks of preference and we like our red wine.
Bread, potatoes, pasta, rice, and the like are virtually out of our diet. Pasta replaced with spiralised butternut squash, courgette, beetroot, sweet potato.
Fish and meat and meat substitutes, eggs, are all acceptable.
It's really no hardship. So good luck with your efforts on behalf of your DH. And to google the research by Dr Unwin on this - a GP who's been successfully trying out this approach on his patients with great results.