Conclusion
smell loss, anosmia
DYSFUNCTION
In the present study, the assessment of olfactory dysfunction based on smell test and VAS scores demonstrated no significant differences between the group that received alpha-lipoic acid associated to olfactory training and the group which received olfactory training with placebo pills. Although at the end of the intervention, anosmia was reported 2% in the intervention group versus 7.8% in the comparison group, no significant differences were found between groups. On the other hand, the change of smell test and VAS scores were significantly higher after the treatment in both groups. This reinforces the importance of olfactory training to recover smell loss due to COVID-19, especially the long-term ones. At last, we recommend further randomized clinical trials to reproduce these results.