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PRN stands for Physician Recommended Nutriceuticals. The company was built around omega 3 formulations endorsed by physicians, and what it talks about most is the form the oil takes rather than the number on the front of the bottle.
Omega 3 supplements reach the shelf in three broad forms: unpurified native oil pressed straight from fish, ethyl ester oils that have been chemically processed, and re-esterified triglyceride oils. PRN uses the third. Every batch goes through third party testing for purity. That is the core of the brand's argument, and it is the reason to read the form on the label rather than only the milligrams.
Softgels or liquid is the first fork. Liquid suits people who would rather not swallow several capsules, and it is the only format stocked for children. After that, buy on supply length rather than count, since a 270 and a 90 are the same product bought at different intervals. If an eye care professional has raised omega 3 with you, take the label to that conversation before you change anything you are already taking.
