Swiss law provides for a maximum level model for vitamins and minerals in foods that is focused on protecting health and is based on current scientific knowledge. The model uses tolerable upper intake levels (ULs) for individual nutrients and considers the different intakes of each nutrient: via the normal daily diet (basic intake), via fortified (“enriched”) foods and food supplements, or via foods for athletes. For these different food categories, nutrients are divided into four groups, ranging from non-critical substances to critical substances with maximum levels, to substances for which maximum levels and warning labels are required.