Strengthens Enamel, Prevents Cavities, Whitens Teeth. No Animal Testing, Artificial Flavors, Sweeteners or Dyes. Gluten Free, Vegan, Halal, Kosher, Animal Test-Free by PETA. Use: Helps protect against cavities. Fights cavities and strengthens enamel with naturally derived fluoride. Whitens teeth with naturally derived silica. Tom's of Maine has combined scientific know-how and naturally sourced and derived ingredients to make effective products since 1970. Beyond making effective products, Tom and Kate created Tom's of Maine to be a force for good and that still drives us today. They have big goals to help combat climate change and social inequities, which is why they donate to non-profit organizations that focus on climate change, health and well-being and disaster relief. Whitens teeth by removing surface stains.