This was a 2 x 2 factorial design, as you can see here. Patients were randomized to usual care or to one of the three treatment arms in a roughly equal fashion.
But when you stratify by treatment, the time to 50% symptom reduction was basically the same across the board: about 5.5 to 6.5 days, depending.
No individual symptom resolved quicker with zinc, vitamin C, or the combo. Basically, the population looked like we’ve come to expect: a few days of fever, with lingering cough and fatigue.
Hospitalization rate didn’t significantly differ, though it was slightly higher in the supplement groups. And there were thankfully only three deaths — one in the vitamin C group and two in the combo group.