Canker sores are vexing and common. The reason they occur isn’t clear, but your toothpaste could be a factor. An ingredient often used to make toothpaste foamy, sodium lauryl sulfate (SLS), has been ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. Credit: Getty Images/Aonip Before we talk too much about homemade dog toothpaste, it’s probably ...