A: This is a question that actually comes up a lot! Low fat milk and cheese generally do not have extra sugar. One specific brand of full fat milk has 4.5g of sugar per 100ml and the low fat has 4.6g per 100ml. This means that you are only losing out on the added fat. Yoghurt however can contain lots of extra sugar. I found one low fat yoghurt with no added sugar and that’s Glenisk low fat yoghurts. However, other low fat products, not dairy, generally do contain a lot of sugar. Anything with less than 5g of sugar per 100g is considered to be low in sugar.