Polyherbal Formulations: A Comprehensive Review of Trending Synergistic Combinations

Polyherbalism, the practice of combining multiple medicinal plants, represents a cornerstone of traditional medical systems worldwide, including Ayurveda, Traditional Chinese Medicine (TCM), and Kampo. This paradigm is predicated on the concept of synergy, where the therapeutic outcome of the combination is greater than the sum of the effects of its individual constituents. Driven by the resurgence of interest in natural products and the limitations of single-target, single-drug therapies for complex diseases, scientifically validated polyherbal formulations are gaining significant traction in global integrative medicine. This review systematically examines trending polyherbal formulations from major traditional systems and contemporary research. We analyse their historical context, phytochemical complexity, and proposed mechanisms of action, focusing on synergistic pharmacological interactions. A critical evaluation of preclinical and clinical evidence for their efficacy in managing prevalent conditions such as metabolic syndrome, neurodegenerative disorders, hepatotoxicity, inflammation, and immune dysregulation is presented. Furthermore, the review addresses key challenges in standardization, quality control, pharmacokinetic herb-herb interactions, and regulatory harmonization. By bridging traditional wisdom with modern scientific rigor, this article highlights the potential of polyherbal formulations as viable strategies for developing novel, multicomponent therapeutics for multifactorial diseases and underscores priorities for future research.