A new documentary premiering in the United Kingdom reveals the first-ever analysis of Adolf Hitler's DNA, uncovering that he had Kallmann syndrome, a genetic disorder linked to incomplete puberty and a higher likelihood of micro-penis. The research also found genetic markers associated with autism, schizophrenia, and bipolar disorder, though experts caution that genetics alone cannot explain behavior or diagnose these conditions. Notably, the study debunks longstanding rumors about Hitler's Jewish ancestry, confirming that his genetic background is exclusively Austrian German. The findings are based on DNA extracted from bloodstained fabric recovered after Hitler's death, matched to known relatives for verification.