Although it is unconfirmed, there is concern that UV tattoo inks may contain carcinogenic compounds, which means there may be a potential cancer risk. Because
Everything You Need to Know About UV Tattoo Ink
Can You Tattoo Over a Removed Tattoo?
Are invisible ink tattoos a thing? Imagine getting one that only appears under UV Useless? Or fun? : r/TattooDesigns
Are UV Tattoos Safe?
Moms Nuclear UV Colors Sterile Tattoo Ink - Safe Reactivity Invisible Fallout
Are glow-in-the-dark tattoos safe? - Quora
Invisible tattoos and UV inks
Are glow-in-the-dark tattoos safe? - Quora
Removing New Tattoos & Colored Ink