Health supplements for allergic rhinitis: A mixed-methods systematic review
This 2020 mixed-methods systematic review assessed the efficacy and safety of various health supplements in managing allergic rhinitis. Analyzing 48 randomized controlled trials and 10 observational studies, the review found promising evidence for single supplements such as apple polyphenols, tomato extract, spirulina, chlorophyll c2, honey, conjugated linoleic acid, methylsulfonylmethane (MSM),