Testing a Vitamin B-Complex Supplement to Prevent Optic Disc Edema and Support Eye and Vascular Health During Long Space Missions

What this Trial Is About

Researchers are evaluating a daily nutraceutical supplement containing bioactive B vitamins to reduce optic disc edema in astronauts during long-duration space missions. This study focuses on optimizing the one-carbon metabolic pathway to improve enzyme function, enhance blood vessel health, strengthen eye tissue elasticity, and reduce retinal thickness changes. The investigation aims to better understand causes of optic disc edema and the effects of this nutritional countermeasure compared to astronauts who did not use supplements. Participants will take a vitamin B-complex supplement before, during, and after a 6 to 12 month spaceflight on the International Space Station. This supplement includes 5-methyltetrahydrofolate, riboflavin 5 phosphate, pyridoxal phosphate, and methylcobalamin. Blood samples are collected multiple times before, during, and after flight to assess vitamin levels, biochemistry, and genetic markers. Eye scans using optical coherence tomography and blood flow measurements will monitor ocular and vascular health. Throughout the study, participants will undergo various tests including blood draws, skin scans for advanced glycation end products, and fingertip temperature assessments to evaluate vascular function. Dietary intake, exercise logs, and medication use will be reviewed. The main outcome is measuring optic disc edema over six months, along with secondary measures of endothelial function, vitamin statuses, oxidative stress markers, and other biochemical indicators. The study lasts throughout the flight and follow-up periods to monitor ongoing effects.

B-Complex: A Nutraceutical SANS Countermeasure