Yes, boogers contain DNA. Because they are made of dried nasal mucus, they capture air pollutants, dirt, dead skin cells, and germs. [1, 2, 3]
Because of this, boogers contain a mix of DNA from different sources:
- Your own DNA: From the dead skin cells and white blood cells that slough off into your mucus.
- Microbial DNA: From the natural bacteria, fungi, and viruses that make up your nasal microbiome.
- Environmental DNA: From trapped particles like pollen, dust, and animal dander. [2, 3, 4, 5, 6]
Scientists can easily extract enough human DNA from a booger to identify a person. While mucus itself is just a protein-and-water secretion with no DNA, the cells trapped inside it provide the genetic material. [2, 7]
AI can make mistakes, so double-check responses
[2] https://www.reddit.com/r/askscience/comments/15oyxha/im_wondering_if_there_is_dna_in_human_waste/