This review of the oral signs and symptoms in patients with COVID-19 includes 40 studies (33 cross-sectional and 7 case reports). The findings show a significant association with taste disorders but little in relation to other oral disorders. As this is planned to be a living review it will be interesting to see if further evidence emerges.
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10 RCTs were included in this update of a Cochrane review of interventions for the management of patients with taste disturbances. VEry low quality evidence suggest that zinc supplementation my be beneficial but further high quality research is needed.
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Taste disorders can have a impact of health and quality of life. This new Cochrane review identified 9 trials (566 participants) and found some evidence that zinc supplements could improve taste perception in people with idiopathic taste disorders. However the evidence is not of high quality.
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