Kingfisher baking soda toothpaste 100mlingredients source function glycerin vegetable moisture retention sodium bicarbonate sodium carbonate gentle abrasive aqua purified water moistener calcium carbonate chalk gentle abrasive sodium lauroyl sarcosinate replaces sodium lauryl sulfate natural ore structuring agent cellulose gum plant fibre thickener mentha piperita peppermint fresh taste mentha viridis spearmint fresh taste limonene fennel fresh taste