Nutrition Supplement for Cystic Fibrosis

The goal of this study is to learn if one nutrition supplement formula works better than a different formula in adults with cystic fibrosis. The main question being addressed is: Will certain atypical versions of certain nutrients outperform typical versions of these nutrients? This will be determined by examining blood measures of nutrient levels and/or indications of nutrient function indicators pre- and post-intervention. Participants will take the supplements for 6 weeks with a blood draw before and after that time.

Inclusion Criteria: * Diagnosed with cystic fibrosis * Diagnosed with exocrine pancreatic insufficiency * 18 years old or older * Currently on modulator * Normal liver enzyme labs Exclusion Criteria: : * Non-English-speaking participants * Acute health crisis * Persistent elevation of liver enzymes \>6 months (E2) (ALT \>80 U/L) * History of liver abnormalities * If patients are currently taking Category A or Category B in the LiverTox categorization system * Recent vitamin D supplementation of 30 mcg/day or higher, vitamin E supplements of 200 IU/day or higher, or copper at 2 mg/day or higher * Any other concern by investigator that the subject is inappropriate for inclusion * Patients who is on a reduced dose of a CFTR modulator * Patients on azole antifungals (voriconazole, itraconazole, posaconzole, \>7 days of fluconazole, etc.). * Patients who binge drink EtOH - for men more than 2 drinks/day, for women more than 1 drink/ day * Patients that are on other medications that are sensitive CYP3A4 substrates - such as tacrolimus for example * Patients on sensitive CYP3A4 substrates including but not limited to tacrolimus, sirolimus, and cyclosporine