Should I have natural yoghurt with a fat meal or a carb meal?

If you have a fat meal you can have any kind of natural yoghurt – even full fat Greek yoghurt if you like it (or crème fraiche or fromage frais).

With a carb meal you would need to have (very) low fat natural yoghurt /crème fraiche/fromage frais. This is why you can have skimmed milk with cereal, a...