was wird beim check-up ab 50 gemacht — what are common causes?

The provided context does not cover the standard check-up for people over 50. In Germany, such a check-up typically includes blood pressure, cholesterol, and blood glucose measurements, cancer screenings (e.g., colonoscopy from age 50, skin cancer screening), vaccination review, and lifestyle counseling. Common causes of health issues in this age group are cardiovascular disease, type 2 diabetes, osteoarthritis, and metabolic disorders. MyBody-X tests (DNA, microbiome) are lifestyle screening tools, not medical diagnostics. They cannot replace a physician-led check-up. If you have symptoms or risk factors, consult a doctor.