Can LCT help with Blutzucker?

The question of whether the LCT gene (lactase persistence) can help with blood sugar is not clearly supported by evidence. LCT determines whether lactose (milk sugar) can be digested after infancy. In lactose intolerance, lactose causes digestive discomfort but not direct blood sugar spikes. Some studies suggest dairy products may promote insulin secretion due to their protein content – independent of LCT genotype. However, robust RCTs linking LCT variants to fasting glucose or HbA1c are lacking. The evidence is therefore 'unclear'. Consumers should understand that a DNA test for LCT primarily indicates lactose tolerance, not diabetes risk. For blood sugar control, established factors like carbohydrate intake, exercise, and medication are decisive.