The FDA lists several risks from tattoos on its website: Infection, Allergies, Scarring, Granulomas, and MRI complications. However, tattoo inks are regulated as cosmetics in this country, which means that there is no federal agency that reviews, or approves, tattoo inks. A study in Lancet revealed titanium, barium, aluminum, and copper are predominantly used as colorants in tattoos, and there is little scientific information about the lifetime internal exposure to these ingredients.