Dr. Andrew Weber, a pulmonologist and critical-care specialist with Northwell Health, has been administering 1,500 milligrams of intravenous vitamin C to his COVID-19 patients in intensive care.

The patients are then given the dosage three or four more times throughout the day, Weber told the New York Post.

To put it into perspective, each dose is more than 16 times the daily recommended dietary allowance of vitamin C. According to the National Institutes of Health, adult men should receive 90 milligrams, while adult women are advised to get 75 milligrams.

Weber disclosed the regimen was enacted based on reports of promising results after the experimental treatments were used on coronavirus patients in Shanghai, China.

"The patients who received vitamin C did significantly better than those who did not get vitamin C," Weber said. "It helps a tremendous amount, but it is not highlighted because it's not a sexy drug."