The goal of this living map of evidence is to act as a resource, attesting to the abundance and nature of the published peer-reviewed evidence being synthesized on natural health products for the treatment of COVID in the form of research reports that have used a systematic (and reproducible) strategy.

Statistical Overview

Numbers of research reports investigating the use of natural health products for the treatment of COVID: 79

Number of studies included in those reports: 2,286*

Number of participants included: 310,484*

*Note: numbers were not included in a number of the papers.








Research papers from 23 countries.
Most common ones:

China – 33 (41.8%)
Brazil – 5 (6.3%)
India – 5 (6.3%)
Italy – 5 (6.3%)
Korea – 4 (5.1%)
Australia – 4 (5.1%)







Most common NHPs include:

Patent herbal formulas: 38 (48.1%)
Vitamin D: 19 (24.1%)
Vitamin C: 18 (22.8%)
Zinc: 10 (12.7%)
Flavonoids: 9 (11.4%)
Vitamin E: 7 (8.9%)
Polyphenols: 7 (8.9%)
Turmeric: 7 (8.9%)

Search terms: systematic review, COVID, COVID-19, SARS-CoV-2, “Severe acute respiratory syndrome coronavirus 2″, “viral respiratory tract infections”, “naturopathic treatment”, “Traditional Chinese medicine”, nutraceutical, “natural product” botanical, herb, “herbal medicine”, “medicinal herbs”, “medicinal plants”, vitamin, mineral