What Makes PRN Different? Superior Formulations PRN omega-3 products contain a concentrated amount of both EPA and DHA. At PRN, our omega-3 products are in a cleaned triglyceride form. Many other brands of omega-3 products are low quality, unpurified, or are sold in a synthetic, ethyl ester form. This form, which is more difficult to absorb, can leave a fishy odor or after-taste. It could take up to 40 capsules to equal the same benefits found in just four capsules of PRN’s products.