wie lang ist der darm — when to see a doctor?

The human intestine is about 5–7 meters long (small intestine 3–5 m, large intestine 1.5 m). The length alone is not a reason to see a doctor. When to see a doctor: persistent abdominal pain, blood in stool, unexplained weight loss, chronic diarrhea or constipation, or changes in bowel habits. These symptoms may indicate inflammatory bowel disease, infections, or other issues. Also seek medical advice if you have a family history of colorectal cancer or alarm symptoms like nocturnal diarrhea or fever. Intestinal length varies individually and has no direct clinical relevance for health. At-home tests (e.g., stool tests) can be complementary but do not replace a medical evaluation.