Pro-Sys OTC Potassium Nitrate Sensitive Toothpaste (SLS) 4oz Relieves Tooth Sensitivity – Formulated with 5% potassium nitrate to help soothe nerve endings and reduce pain from hot, cold, sweet, or acidic foods. Cavity Protection – Contains fluoride to strengthen enamel and help prevent cavities while providing gentle care. Daily Use Formula – Safe and effective for everyday brushing as part of your oral hygiene routine. Freshens Breath with Every Brush: Delivers a clean, refreshing mint flavor for a fresh-mouth feel after each use.