A 2013 study showed that the ingestion of hardaliye had an antioxidant effect in adults.[3]
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.[4]
^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.