Look for the ADA Seal of Acceptance on the packaging. The American Dental Association rigorously tests toothpaste before awarding their seal, so this ensures the toothpaste meets their safety and effectiveness standards.
Check for the abrasiveness rating, which measures the abrasive content. The lower the rating, the less abrasive and more gentle it is on your enamel. You should avoid toothpaste with high abrasive ratings. You can also ask your dentist which specific brands or formulas they recommend based on your dental needs.