This study quantifies the titanium content in common food products, estimates human exposure to dietary titanium dioxide (TiO₂), and discusses the environmental impact of nanoscale TiO₂. Foods with the highest TiO₂ content included candies, sweets, and chewing gums. Personal care products like toothpaste and select sunscreens contained 1-10% titanium by weight. While many products had low titanium levels, their widespread use and disposal into wastewater treatment plants (WWTPs) warrant attention. Food-grade TiO₂ (E171) is commonly used in foods and has a significant annual usage, making it a key focus for environmental testing. The study found that approximately 36% of E171 particles are less than 100 nm in size and readily disperse in water. However, filtration of water-soluble products showed less than 5% of titanium passing through 0.45 or 0.7 μm pores. Two white paints contained 110 μg Ti/mg, while three sealants contained less titanium. Human exposure analysis indicated that children have higher exposure due to higher TiO₂ content in sweets. A Monte Carlo analysis estimated a typical adult exposure of 1 mg Ti/kg body weight/day. The study highlights the need for focused testing on E171 rather than P25, which is used in lower quantities and less likely to enter the environment. The research underscores the importance of understanding the fate and transport of TiO₂ in the environment, particularly from food-grade materials.This study quantifies the titanium content in common food products, estimates human exposure to dietary titanium dioxide (TiO₂), and discusses the environmental impact of nanoscale TiO₂. Foods with the highest TiO₂ content included candies, sweets, and chewing gums. Personal care products like toothpaste and select sunscreens contained 1-10% titanium by weight. While many products had low titanium levels, their widespread use and disposal into wastewater treatment plants (WWTPs) warrant attention. Food-grade TiO₂ (E171) is commonly used in foods and has a significant annual usage, making it a key focus for environmental testing. The study found that approximately 36% of E171 particles are less than 100 nm in size and readily disperse in water. However, filtration of water-soluble products showed less than 5% of titanium passing through 0.45 or 0.7 μm pores. Two white paints contained 110 μg Ti/mg, while three sealants contained less titanium. Human exposure analysis indicated that children have higher exposure due to higher TiO₂ content in sweets. A Monte Carlo analysis estimated a typical adult exposure of 1 mg Ti/kg body weight/day. The study highlights the need for focused testing on E171 rather than P25, which is used in lower quantities and less likely to enter the environment. The research underscores the importance of understanding the fate and transport of TiO₂ in the environment, particularly from food-grade materials.