Unveiling the Therapeutic Potential of Gallic Acid: Mechanistic Insights into the Management of Pathogenesis: A Narrative Review

Gallic acid (GA) is a natural polyphenol abundantly found in a variety of fruits, including blackberries, apples, pineapples, strawberries, bananas, and grapes. With prominent anti-inflammatory and antioxidant properties, GA effectively mitigates inflammation and oxidative stress. Furthermore, it plays a significant role in modulating various cellular processes and biological activities, ultimately inhibiting the progression of pathogenesis. This review explores the multifaceted health benefits of GA, highlighting its role as antidiabetic, anti-obesity, anti-arthritis, hepatoprotective, cardioprotective, and neuroprotective effects. Additionally, its impact on the respiratory, digestive, and reproductive systems, along with its related pathogenesis, is described. Additionally, its role as an antimicrobial is defined primarily through mechanisms such as disruption of microbial cell membranes, inhibition of efflux pumps, and antibiofilm activity. Moreover, this review provides a novel, integrative analysis of GA by unifying its mechanistic roles across various pathogenesis. It further describes the role of GA in cancer management via the modulation of signaling pathways. In addition, it demonstrates the synergistic effects of GA when used in combination with other drugs/compounds and discusses nanoformulation approaches that improve its therapeutic efficacy. However, despite significant preclinical outcomes, the clinical application of GA is limited by a shortage of human trials, low bioavailability, and an inadequate understanding of its mechanisms of action and optimal dosage. To overcome these limitations, well-designed clinical trials, in vivo studies, and advanced nanoformulation approaches are required to enhance bioavailability, elucidate mechanisms of action, and increase knowledge of safety and long-term toxicity. Addressing these gaps will enable the full exploration of GA's benefits in disease prevention and management.