There is sugar in yoghurt: lactose. It's about 1/10 as sweet as sucrose (table sugar) so you might not be aware it's there. If the yoghurt is low fat then it ha

There is sugar in yoghurt: lactose. It's about 1/10 as sweet as sucrose (table sugar) so you might not be aware it's there. If the yoghurt is low fat then it has proportionally more sugar. There are no "low carb" yoghurts. Sweet yoghurt is definitely not an American thing. Up until the last 10-15 years it was quite hard to find unsweetened yoghurt in either the UK or much of Europe. In France it was particularly hard as they seemed to prefer sweetened set yoghurt. In Spain that's still the default as of quite recently.