A Review on: Nootropics as Cognitive Enhancers: Pharmacological Mechanisms and Therapeutic Potential of Ocimum Tenuiflorum L

Ocimum tenuiflorum L. (Holy basil or Tulsi) is a prominent medicinal plant extensively used in traditional systems of medicine for the management of inflammatory, infectious, metabolic, and stress-related disorders. Contemporary pharmacological investigations have validated many of these traditional applications and revealed a wide spectrum of biological activities attributable to its rich phytochemical composition, including flavonoids, phenolic acids, terpenoids, sterols, and triterpenoids. This review critically synthesizes preclinical evidence on the therapeutic potential of O. tenuiflorum, highlighting its anticancer and chemo preventive effects mediated through antioxidant reinforcement, induction of phase II detoxifying enzymes, immune modulation, and regulation of apoptosis and cell proliferation. The plant also exhibits significant cardioprotective and antihypertensive activities via peripheral vasodilation, prostaglandin modulation, and protection against ischemic myocardial injury. Neuropharmacological studies demonstrate central nervous system depressant, anticonvulsant, antistress, and antidepressant-like effects, while antipyretic and immunomodulatory properties further support its role in inflammatory and infectious conditions. Additionally, O. tenuiflorum shows reversible antifertility effects in male experimental models through disruption of spermatogenesis and hormonal regulation. Collectively, the multitargeted pharmacological actions of Ocimum tenuiflorum underscore its potential as a complementary therapeutic agent in integrative medicine, although further research focusing on standardization, pharmacokinetics, and clinical validation is required to translate these findings into clinical practice.