Our Green Lipped Mussel Extract is sourced from the New Zealand Green Lipped Mussel that is found in the clean, clear waters off New Zealand. Each ZipVit tablet contains an extract of the highest quality, whilst maintaining our legendary value for money.Active ConstituentsEach Green Lipped Mussel contains high levels of glycosaminoglycan.Are there any side effects or interactions ?At the time of writing there were no well known side effects or drug interactions however, this product is not recommended for shellfish allergy sufferers. (size S)