5. Cod Liver Oil
Cod liver oil is another traditional food that is seeing renewed popularity. Although it was seldom a culinary favorite and was given to schoolchildren to boost immunity, today people are embracing cod liver oil along with other oily fish.
This oil is rich in Omega 3 fatty acids which are associated with heart health and also contain Vitamin D. A tablespoon of cod liver oil provides 280% of the daily requirement of Vitamin A. You can take this oil by the tablespoon or through capsules.
Fish oils also have a beneficial impact on brain functioning.