Probiotic yogurts can vary in effectiveness depending on the specific bacteria strains included in them. Some probiotic yogurts have been shown to have beneficial effects on certain conditions such as constipation and irritable bowel syndrome. However, not all probiotic yogurts have been extensively studied, so their effectiveness for other purposes is still uncertain. It is important to consult with a pharmacist to choose the most suitable probiotic product for your needs. When it comes to sugar content, flavored yogurts with probiotics may contain added sugars, but the amount of sugar in them is not necessarily higher than in regular flavored yogurts. Plain yogurt typically has the lowest sugar content among yogurt varieties.