INTRODUCTIONPlants have been utilized worldwide to cure several diseases since time immemorial and as per World Health Organization, about 80% of individuals globally still use them (Tugume and Nyakoojo, 2019). The herbal-based medicine could be a novel approach to the replacement of synthetic drugs like aspirin, orlistat, ibuprofen, and others due to their adverse effect of the later on human health (Jagessar, 2020;Maqbool et al., 2019). Plant-based medications are safe, and efficacious owing to the presence of diverse phytoconstituents (Tugume and Nyakoojo, 2019; WHO, 2013). In this context, Allium fistulosum L. can be utilized as a useful herbal drug candidate to treat various human diseases. Allium fistulosum commonly known as Welsh onion, is a member of the family Amaryllidaceae. It is grown in Asia, including Korea, Japan, China, and Vietnam (Lee et al., 2018).Allium fistulosum is a commonly used vegetable crop in various Eastern countries including Japan, Korea, and China (Sung et al., 2018). Western countries have used Welsh onion as traditional medicine against flu, abdominal pain, constipation, headache, arthritis, gastrointestinal disorders, parasitic infestations, cardiac diseases (Sung et al., 2018), colon diseases (Chang et al., 2016), as well as against hypercholesterolemia (Bhat and Nagandram, 2001). In traditional Chinese medicine, Welsh onion is recommended against renal deficiency, dizziness, and cold (Lai et al., 2010), and is also used for the common cold in Japan (Bhat and Nagandram, 2001). Further, plant parts like flowers, leaves, stems, and roots have been used to lower blood pressure, treat cancer, inhibit bacterial strains, and resist viruses, also stem and roots are used as antipyretic and also against the common cold in China (Zhai et al., 2015). The bulbs are used to enhance vision in China (Longe, 2005). Subsequently, the plant is used as an immunity booster in Japan (Ueda et al., 2012). Interestingly, A. fistulosum congee (A. fistulosum and Oryza sativa mixture) was found effective in treating numerous COVID-19 patients at an