Examples of products that contain carrageenan are dog food, chocolate, toothpaste and baby food. Alginate comes from brown algae and is used to make water-based products thicker or creamier. Ranch dressing, heartburn relief medicine and hand creams all can contain alginate.
*Carrageenans or carrageenins are a family of linear sulfated polysaccharides that are extracted from red edible seaweeds. They are widely used in the food industry, for their gelling, thickening, and stabilizing properties. (Wiki)