Polysorbate 80 is an artificial chemical that's used in shampoos, cosmetics and some foods as an emulsifier. It can also be added to fish oils to lesson 'fishy' reflux, and this certainly leaves a bad taste in our mouths. Because at Blackmores we prefer to use more natural ingredients, such as lemon and vanilla flavours, to keep our fish oils odourless. And it's our dedication to ensuring our products remain as naturally free from artifical chemicals as possible. Which means the only thing that's fishy about Blackmores Odourless Fish Oil is the goodness of the fish oil - without artificial flavours or chemicals such as polysorbate 80 - to help you be your best.