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 – as of February 2023

Number of systematic reviews investigating the use of natural health products for the treatment of COVID: 163

Number of studies included in those reports: 3,494*

Number of participants included: 1,047,183*

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

Research papers from 24 countries.
Most common ones:

China – 48 (32.9%)
India – 18 (12.3%)
Iran – 12 (8.2%)
Brazil – 11 (7.5%)
Italy – 7 (4.8%)

Most common NHPs include:

Patent herbal formulas: 50 (19.03%)
Vitamin D: 34 (13.1%)
Vitamin C: 24 (9.3%)
Zinc: 12 (4.6%)
Probiotics: 10 (3.9%)
Ayurveda: 9 (3.5%)
Flavonoids: 9 (3.5%)
Turmeric: 9 (3.5%)

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