A 2013 study showed that the ingestion of hardaliye had an antioxidant effect in adults.
Hardaliye's nutritional value comes from the grapes as well as the fermentation process. Health benefits of hardaliye can be attributed to etheric oils from the mustard seeds.
↑Amoutzopoulos, Birdem; Löker, Gül B; Samur, Gülhan; Çevikkalp, Senem A; Yaman, Mustafa; Köse, Timur; Pelvan, Ebru (November 2013). "Effects of a traditional fermented grape-based drink 'hardaliye' on antioxidant status of healthy adults: a randomized controlled clinical trial". Journal of the Science of Food and Agriculture. 93 (14): 3604–3610. Bibcode:2013JSFA...93.3604A. doi:10.1002/jsfa.6158. PMID23553618.