It was given by my Mum to us boys in the 50's. Dad was able, through his Union, to buy Halibut Liver Oil capsules very cheaply. At the age of 64, I still take them, plus some high dosage Vitamin C, and I only have maybe one cold a year now.
We were given the capsules as children, I always bit mine and called it 'my little drink'! On a Norwegian cruise earlier this year on the way back down there was a crossing the Arctic Circle ceremony where we were given a spoonful of cod liver oil and got to keep the spoon. OH had missed the start and thought it was a Norwegian liqueur, his face was so funny, it was all my fault, naturally, for not warning him.
Do you mean Osteoarthritis or Rheumatoid arthritis?
Cod Liver Oil for either is an urban myth, BUT Glucosamine is a better bet for Osteoarthritis, but in my opinion is a waste of time.
I remember the ads where the actors said that the oil 'lubricated their joints'. I'm not a doctor, but I don't see how how oil in a capsule can come out of your stomach and down to your knee and hip joints to lubricate them.
OH used to take Glucosamine, but now takes cod liver oil. I don't think either of them have helped him.