Provided herein is technology relating to lipid compositions containing bioactive fatty acids and particularly, but not exclusively, to compositions and methods related to the production and use of juniperonic acid alone or in combination with other bioactive fatty acids and lipids including, but not limited to, eicosapentaenoic acid, docosahexaenoic acid, sciadonic acid, conjugated linoleic acid, non-β-oxidizable fatty acid analogues such as tetradecylthioacetic acid, fish oil, olive oil, and pine nut oil.