Simple things that often help
Taking fish oil with a meal rather than on an empty stomach is the first thing most people try, since food may reduce the repeat. Splitting a larger serving into smaller ones across the day can also help.
Some people keep the capsules cold in the fridge or freezer, which they find cuts down the fishy aftertaste.
If it still bothers you
Different product forms behave differently, so if burps persist, a pharmacist can point you toward alternatives that may sit better. Meanwhile, a reminder helps you take it with the right meal each day — Pillog lets you set the time, check it off from the notification, and see your month as a card, all on your phone with no account.
There is no need to force something that consistently disagrees with you; it is worth asking for options.