Hi doctors, can you tell me what is it in asparagus or in some people that cause odorous urine?

Asparagus smell: Asparagus (a) contains a sulphurous compound called mercaptan (m). As digestive system breaks down m, by-products are released that cause the strange smell. It's quick and your urine can develop the distinctive smell within 15 to 30 minutes of eating a. Not everyone suffers this your genetic makeup. Some people appear to have the gene for the enzyme that breaks down m into its pungent parts.