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Dr. Chip
Dr. Chip, Doctor (MD)
Category: Health
Satisfied Customers: 27454
Experience:  Over 20 yrs of Family Practice
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how lond does dna stay in your saliva once its left the bo

Customer Question

how lond does dna stay in your saliva once its left the body
Submitted: 5 years ago.
Category: Health
Expert:  Dr. Nomi replied 5 years ago.
Hi,
DNA can survive for many years in saliva since it has left the body.
Regards
Customer: replied 5 years ago.
Relist: Inaccurate answer.
Customer: replied 5 years ago.
so if i drank from a bottle of water my dna would be on it years later? i read that it only lasts 4 to 14 days unless stored correctly?
Expert:  Dr. Chip replied 5 years ago.
Hi--are you asking how long a sample of your DNA might be detectable and analyzable from a glass if the glass were untouched for a long time?
Customer: replied 5 years ago.

kind of yes, but its a plastic water bottle. is it not correct that after 14 days the sample on the bottle would be of no use?

Expert:  Dr. Chip replied 5 years ago.
Not of no use--that would depend on where the bottle had been. If it were properly gathered and stored (the bottle) then the sample could be analyzed several years later. If the bottle were left out in the heat or cold or the environment, then the DNA could have been degraded.
Customer: replied 5 years ago.
i see so if it were left in a warm or cold room it would degrade,does this happen quick? perhaps thats where i read about the 14 days
Expert:  Dr. Chip replied 5 years ago.
It would be variable, depending on the environment. The basic point is the the analysis could always be tried and there would always be a chance that the DNA was intact still.
Dr. Chip, Doctor (MD)
Category: Health
Satisfied Customers: 27454
Experience: Over 20 yrs of Family Practice
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