As an Icelander raised on Lýsi (cod liver oil) I remember fishy burps all day long as a kid. I still take Lýsi every day but the burps are gone, it's probably a couple of decades now since they perfected purification of the oil to make it mostly taste/smell free. My kids still get lýsi every day to no complaints (and it's a part of the daily routine in Icelandic kindergartens).
When is the best time to give the code liver oil to a kid?
(Or maybe it does not matter) but I read multiple suggestions: in the morning after breakfast or at least 1-2 hours _before_ a meal or at least 1-2 hours _after_ a meal.
Can you please share when do you give this? ( I am assuming that you have a better tradition/understanding of this)
