I've been on a low-carbon diet for about a year now (I'm 60 this year), lost 12 kilos, and have more energy plus I have a much more stable blood sugar level.
I still play floor-hockey and I feel better now after a game, both due to weight-loss and the blood sugar levels.
In effect I eat meat/fish/bird and have only low-carb vegetables with it, and an occasional glas of red wine.
The bad part is no beer, but I can live without the sugar content in many products.
Only on vacation I get my beer, and other things I miss.