The present study was aimed to evaluate the anti-obesity property of Tamarindus indica seed extract (TSE) on high fat-fed obese rats. TSE was prepared by cold maceration method and qualitative phytochemical studies had been carried out. In vitro cell viability assay (MTT assay) was and oil red staining for evaluating the lipid accumulation in cells was carried out using 3T3-L1 cells, and leptin levels was evaluated by ELISA. In-vivo Obesity was induced in experimental rats by administration of a high-fat diet for 04 weeks. The anti-obesity effect was screened by oral administration of TSE at two different dose levels i.e., 250 and 500mg/kg b. Wt. Along with a high-fat diet for a period of 04 weeks. The anti-obesity activity is estimated in terms of body weight gain, serum triglycerides (TG), Total cholesterol (TC). In -vitro studies revealed that the TSE has no cytotoxic effect, Administration of a high-fat diet for 04 weeks significantly increased the body weight, serum triglycerides, cholesterol. Upon treatment with TSE, a significant dose-dependent alteration in body weight, triglycerides, cholesterol levels were observed, inferring the anti-obesity property of Tamarindus seed extract.

Diabetes mellitus is a chronic metabolic disorder characterized by hyperglycemia arising from deregulation in insulin secretion, insulin action, or both. The current synthetic drugs have dose-dependent side effects which confined their uses. The phytochemicals are the natural compounds that have better therapeutic efficacy and interacts synergistically with oral hypoglycemic drugs. The addition of phytochemicals with OHDs may reduce the dose of synthetic drugs as well as their side effects and toxicity. A detailed outline about such combinations like Ferulic acid & THZ/Metformin, Ellagic acid & Pioglitazone (THZ), Chlorogenic acid & THZ/Metformin, Caffeic acid & THZ/Metformin, eugenol acid & THZ/Metformin, cinnamic acid & THZ/Metformin, p- coumaric acid & THZ/Metformin, Arecoline &Vanillic acid with the THZ/ Metformin have been illustrated. This review has also discussed the synergy and mechanism of phytochemical with the OHDs to combat hyperglycemia and other risk associated with it. A comprehensive review was conducted to pile up the information about polyphenols & synthetic drug combinations used for the treatment of diabetes mellitus, which has been carried out in-vitro or in-vivo and may contribute to identifying novel strategies in the treatment of T2D condition. This review shows the importance of the responsible bioactive agents present in medicinal plants in the drive to demonstrate their antidiabetic effects.