Sorry I don't know. I don't think anyone knows. If you have a history of sensitivity, you should refrain from using the gel caps. if you still want to take fish oi, then get the ones that comes in a bottle instead. A good fish oil is very pure and will not freeze when put in the freezer. ( not frigerator). After you open the bottle, put it in the freezer. Do not use styroform cup or plastic spoon as good and pure fish oil will melt it.