The effect of Nutrition Bio-shield Superfood (NBS) on disease severity and laboratory biomarkers in patients with COVID-19: a randomized clinical trial.

Background. Nutrition Bio-shield Superfood (NBS) is an organic and viable herbal supplement that could improve the function of the immune system. The present study aims to determine the effect of NBS on disease severity and laboratory biomarkers in patients with COVID-19. Methods. This current study was a randomized, comparative, parallel two-arm and single-blind clinical trial study performed in Tehran, Iran. In total, 70 patients with COVID-19 were included in the present study and assigned to two groups including (1) intervention group (n = 35) and (2) control group (n = 35). All patients included in the intervention group received 4.5 gr daily rate of NBS superfood, three times the daily rate of 1.5 gr for 14 days. In contrast, patients included in the control group received a placebo three times a day for 14 days. The measurement of laboratory parameters including CRP, ESR, D-Dimer, LDH, CPK, SGOT, SGPT, ALP, FBG,...