Myocardial alterations resulting from feeding partially hydrogenated marine oils and peanut oil to rats

Myocardial alterations were observed in 5 groups of rats fed diets containing 20% fat for 16 weeks. The incidence was comparable to that from other studies and uniform at 6/20 in hearts from rats fed: partially hydrogenated herring oil to give dietary levels of either 16.7% or 4.6% 22∶1; partially hydrogenated redfish/flatfish oil to give 4.5% 22∶1 in the dietary fat; and peanut oil (of unknown origin) containing 0.1% 22∶1. The incidence was 9/20 in the hearts of rats fed an unrefined and unprocessed redfish oil at a dietary level of 16.0% 22∶1 in fatty acids.