Conclusion
Garlic has been used as part of folk medicine for a long time. Research on the topic has confirmed its effectiveness.
References:
[1] https://www.ncbi.nlm.nih.gov/pubmed/11697022
[2] https://www.ncbi.nlm.nih.gov/pubmed/22280901
[3] https://www.ncbi.nlm.nih.gov/pubmed/25386977
[4] https://dentalimpressionsofankeny.com/2012/04/ankeny-foust-garlic-and-gum-disease/
[5] https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0112726
[6] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3901385/
[7] https://www.ncbi.nlm.nih.gov/pubmed/19060427
[8] https://www.ncbi.nlm.nih.gov/pubmed/16335787
[9] https://www.ncbi.nlm.nih.gov/pubmed/24035939
[10] https://pubmed.ncbi.nlm.nih.gov/23590705/
[11] https://pubmed.ncbi.nlm.nih.gov/19060427/
[12] https://www.ncbi.nlm.nih.gov/pubmed/11238795
[13] https://www.ncbi.nlm.nih.gov/pubmed/15881870
[14] https://www.ncbi.nlm.nih.gov/pubmed/17955479
[15] https://www.ncbi.nlm.nih.gov/pubmed/23713527
[16] https://www.ncbi.nlm.nih.gov/pubmed/21143861
[17] https://www.ncbi.nlm.nih.gov/pubmed/16619371
[18] https://www.ncbi.nlm.nih.gov/pubmed/23039014
[19] https://www.ncbi.nlm.nih.gov/pubmed/11238796
[20] https://pubmed.ncbi.nlm.nih.gov/16335787/
[21] https://www.jwatch.org/na47833/2018/11/02/does-eating-garlic-decrease-gastric-cancer-risk
[22] https://www.postandcourier.com/news/garlic-might-help-fight-deadly-brain-cancer/article_37c87287-a317-5c83-b500-b292e0a76599.html
[23] https://www.ncbi.nlm.nih.gov/pubmed/22151785