Human is subjected from his surrounding to various hepatotoxins, which aggravates his liver. nowadays, natural polyphenols have attracted great interest in health improvement, especially liver health. the present research, therefore, assessed the hepatotherapeutic potency of the isolated polyphenols (VVF1) from seedless (pulp and skin) black Vitis vinifera (VV) against CCl 4 -induced hepatotoxicity in vitro and in vivo. Further, VVF1 was fractionated into resveratrol-enriched (VVF2) and phenolics-enriched (VVF3) fractions to study (in vitro) the possible synergism of their coexistence. The highest content of phenolics in VVF1 displayed in vitro synergistic antioxidant and anti-hepatotoxic activities comparing to VVF2, VVF3, and silymarin (SM, reference drug). More importantly, it exhibited multiple in vivo regulatory functions via diminishing oxidative stress and inflammation, which in turn decreased necroptosis and pro-fibrotic mediators (mixed lineage kinase domain-like protein (MLKL), collagen type I alpha 1 chain (COL1A1), and transforming growth factor (TGF)-β1). In addition to these novel findings, VVF1 had higher anti-hepatotoxic potency than that of SM in most of the studied parameters. The histopathological analysis confirmed the improving role of VVF1 in the serious hepatic damage induced by ccl 4 . Thus, the synergistic functions of VVF1 polyphenols could be a promising new anti-hepatotoxic agent for targeting both necroptotic and profibrotic mediators.The liver is the largest organ of the body and the main defense organ against environmental and metabolic toxins. Administration of certain medicinal, chemical, or industrial agents can induce hepatotoxicity. Due to the conversion of these hepatotoxins into reactive metabolites by the hepatic cytochrome P450 (CYP) metabolizing enzymes 1 . Carbon tetrachloride (CCl 4 ) is a well-known hepatotoxin that caused liver cell damage by inducing hepatic oxidative stress, inflammation, and necroptosis 2,3 . Necroptosis is a pathophysiological process called programmed necrosis and combines the features of both necrosis and apoptosis-dependent inflammatory cell death. Hence, it is a highly regulated process involving specific molecules (e.g., pro-necroptotic mixed lineage kinase domain-like protein (MLKL) and at the same time associated with a membrane integrity defect 4 . All of these damage effects lead to hepatic steatosis, fibrosis, cirrhosis, and may develop into hepatocellular carcinoma if the hepatotoxin persist 2,3 .Medicinal plants have crucial roles in health care and improving multiple human disorders. Grape (Vitis vinifera, VV) is one of the medicinal plants used in folk medicine and belongs to the Vitaceae family with a woody climbing vine and large leaves 5 . It can grow all over the world "non-climacteric fruit" and is considered to be the most broadly planted fruit crop and the most consumed fruits worldwide. The VV is rich in sugars, organic open Scientific RepoRtS | (2020) 10:2452 | https://doi.org/10.1038/s41598-020-59489-z www.nature.com/scienti...