United Kingdom
The UK lacks mandatory infection-control certification for tattooists. In one report, 18% of people with recent tattoos or piercings experienced negative effects like burning or swelling .
The UK Health Security Agency released a Toolkit in March 2025 promoting safer procedures, but training remains voluntary .
United States
The US also lacks uniform federal regulation of tattoo inks. Ingredients need not be disclosed when sold to professionals, only in retail cosmetics . Some states enforce blood-donation deferrals after tattoos unless done in regulated studios .
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