A new study suggests that vitamin C and zinc don’t help fight off COVID-19, even when they’re taken at high doses.

What’s going on?

The study — published in mid-February in JAMA Network Open — found that vitamin C and zinc don't lessen or fight off COVID-19 symptoms.

  • This study was the first randomized clinical trial that tested the two supplements against COVID-19, according to CNN.
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Researchers reviewed 214 adults with confirmed COVID-19 infections, per Medical Xpress. They monitored how people responded to 10 days of zinc gluconate (50 milligrams/mg), 10 days of vitamin C (8,000 mg), both or usual care.

  • The study’s findings were that the two supplements did not benefit people who were isolating with COVID-19.
  • Researchers stopped the study early because “the findings were so unimpressive,” according to CNN.
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“Unfortunately, these two supplements failed to live up to their hype,” wrote two of the study’s authors, Dr. Erin Michos of John Hopkins and Houston Methodist’s Dr. Miguel Cainzos-Achirica.

Other vaccines

Back in September, a new study from the University of Chicago suggested that a lack of vitamin D could create more severe coronavirus cases, which I wrote about for the Deseret News.

  • The study found that an untreated vitamin D deficiency could increase a patient’s likelihood of testing positive for COVID-19 by 77%, per Yahoo News.
  • “In this single-center, retrospective cohort study, likely deficient vitamin D status was associated with increased COVID-19 risk, a finding that suggests that randomized trials may be needed to determine whether vitamin D affects COVID-19 risk,” the study said, as I wrote about for the Deseret News.