# DNA in shared cigarette?

**URL:** <https://boards.straightdope.com/t/dna-in-shared-cigarette/604050>\
**Category:** Factual Questions\
**Created:** [November 25, 2011, 4:07pm UTC](https://boards.straightdope.com/t/dna-in-shared-cigarette/604050 "2011-11-25T16:07:54Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![sasprilla](https://avatars.discourse-cdn.com/v4/letter/s/3e96dc/32.png) [@sasprilla](https://boards.straightdope.com/u/sasprilla)\
**Post date:** [November 25, 2011, 4:07pm UTC](https://boards.straightdope.com/t/dna-in-shared-cigarette/604050/1 "2011-11-25T16:07:54Z")

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If two people smoke the same cigarette, can the DNA of one or both be found or does the combination mess up the DNA altogether? If so, is it possible that the combined DNAs would match another person’s?

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**Author:** ![DCnDC](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/dcndc/32/2842_2.png) [@DCnDC](https://boards.straightdope.com/u/DCnDC)\
**Post date:** [November 25, 2011, 4:22pm UTC](https://boards.straightdope.com/t/dna-in-shared-cigarette/604050/2 "2011-11-25T16:22:02Z")

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Both sets of DNA would be found, wholly separate.