Materials Professionals Recommend
Implant-Grade Titanium
Titanium that meets ASTM F136 or ISO 5832-3 standards is widely recommended by piercing professionals, including those affiliated with the Association of Professional Piercers, for both new and healed piercings. It is prized for being nickel-free and biocompatible, meaning it's manufactured to standards originally developed for surgical implants.
Certified Surgical Steel (ASTM F138 / ISO 5832-1)
Surgical steel that meets recognized implant-grade certifications can be a safe option for many wearers, though it typically contains trace nickel, which can still trigger reactions in individuals with nickel sensitivity. Buyers should look specifically for ASTM F138 or ISO 5832-1 certification rather than generic "surgical steel" labeling, which is not a regulated term in the U.S.
Solid Gold (14k or Higher)
Solid 14k or higher gold is considered safe for healed piercings by many professionals, provided it's genuinely solid rather than gold-plated. Gold-plated or gold-filled jewelry is generally discouraged for new or healing piercings, since plating can wear away and expose base metals underneath, some of which may contain nickel or other reactive alloys.