S. torvum (Solanum torvum) and S. nigrum (Solanum nigrum) are native to tropical and subtropical nations including Japan, Brazil, Mexico and Ghana. S. torvum and S. nigrum locally referred to Ekwanho nsusua and nsusua respectively are rich in minerals and vitamins. Apart from being used in the preparation of stews and soups, they also have medicinal properties. Such properties include antioxidant, antiviral, antimicrobial, antihypertensive, antiplatelet aggregation and cardiovascular protection. There is limited information on the bioaccessibility of phytochemicals present in S. torvum and S. nigrum. In addition, there is limited use of these Solanum species in the human diet. This study therefore characterized S. torvum and S. nigrum and assessed their bioavailability and utilization in functional foods. Specifically the proximate composition, minerals, heavy metals, total phenols and antioxidant activity of the berries and leaves of the two Solanum species were investigated. Furthermore, the aqueous extracts of S. torvum and S. nigrum were evaluated for safety and anti-diabetic activity. Herbal tea products were developed from S. nigrum. In addition spice powder from S. torvum and S. nigrum has been developed. Consumer acceptability tests, anti-nutrients profile and antioxidant prolife were conducted on the products. Through this study, it was discovered that both Solanum species contained crude fibre, crude protein and crude fat in addition to Na, Mn, K, Zn and Fe at varying concentrations. Iron was more abundant in the leaves as compared to the berries. Potassium was the most abundant mineral in the berries whilst iron formed the highest component of minerals in the leaves for both species. In this study, Fe, Mn and Zn in S. torvum fruits were determined to be 16.49 mg/kg, 10.42 mg/kg and 1.58 mg/kg. The current study found that the aqueous and ethanolic extract of S. torvum and S. nigrum demonstrated promising in vitro antioxidant activity. The three major fatty acid esters identified in Solanum nigrum leaves (SNL), Solanum torvum berries (STF) and Solanum nigrum berries (SNF) were methyl stearate, Docosanoic acid methyl ester and Eicosanoic acid methyl ester. Other biologically active compounds identified included squalene and palmitic acid which was found in Solanum nigrum leaves and Solanum torvum leaves (STL) while methyl palmitoleate and palmitic acid methyl ester were fatty acid esters identified in Solanum nigrum berries. Palmitic acid (98.38%, RT: 8.13 min) a fatty acid was found in the leaves of S. torvum. Methyl stearate (99.68 %, RT: 9.86 min), Docosanoic acid, methyl ester (99.56%, RT: 15.04 min), and Eicosanoic acid methyl ester (99.78 %, RT: 12.35 min) were some fatty acid esters identified in STL. Other compounds identified included squalene. However, Sitosterol (94.93 %, RT: 26.82 min), a phytosterol was found in the (Solanum nigrum boiled fruits) SNB. Results demonstrated that irrespective of the dosage, all extracts led to a reduction in rat body weight. Notably, the body weight of the normal control group significantly increased on days 14, 21, and 28 compared to day 7. The glucose inhibitory effect of the 500 mg/kg extract wasn't significant compared to the 100 mg/kg dose after 120 minutes. Results from the safety test showed that the two plants are safe on the liver, kidneys, spleen, heart and blood. Boiled extract of S. nigrum at 1000 mg showed an anti-diabetic effect similar to a standard anti-hyperglycaemic drug, Glibenclamide (10 mg/kg). The anti-hyperglycaemic activity of S. torvum and S. nigrum extract may be due to the presence of several bioactive anti-diabetic factors. Both Solanum nigrum and Solanum torvum spices were found to possess catechins (0.255 to 0.756 mg/g), saponins, flavonoids, oxalates, phytates and tannins. The antioxidant activity of the various herbal tea samples ranged from 66.37±0.24 to 78.53±0.18 µg/mL GAE as determined by the DPPH free radical assay. The Solanum nigrum fermented herbal tea had superior antioxidant properties in comparison to the Solanum nigrum unfermented herbal tea. Solanum nigrum unripe unfermented herbal tea exhibited the highest average score for overall acceptability with exceptional sensory characteristics. The collective findings of this study underscore the therapeutic potential of S. torvum and S. nigrum. The developed herbal tea and spice products promise health benefits and present novel culinary resources for contemporary diets.