As we strive for better health, it's crucial to monitor not only what we ingest but also what comes into contact with our bodies, and that includes tattoo ink

While tattoos boast a millennia-long history, there's still considerable room for improvement in understanding the composition of tattoo ink.

For more, KCBS Radio's Dan Mitchison spoke with John Swierk, Assistant Professor at the Department of Chemistry at Binghamton University.