Signal Cavity Fighter contains Pro-Fluoride Complex and active Micro-Calcium helps protect your teeth against tooth decay and the effects of acid attacks. The formula helps repair Tiny invisible holes caused food acid attacks and provides cavity Protection and Long Term fortification. Long Lasting Action: The Caries Signal Protection formula contains Fluoride that protects your teeth even between brushings. Clinically proven efficacy. FDI recognizes that brushing twice a day with fluoride toothpaste like Signal Protection Caries helps maintain good dental health.