Which foods are rich in Omega-7?

Omega-7 fatty acids are found in certain fish – salmon, anchovy, and oils such as olive oil, macadamia oil, and sea buckthorn oil (1).

(1) Yang B, Kallio HP. Fatty acid composition of lipids in sea buckthorn (Hippophaë rhamnoides L.) berries of different origins. J Agric Food Chem. 2001 Apr;49(4):1939-47.