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This study evaluated the phytochemical and nutrient composition of four selected vegetables consumed in Nigeria, namely, bush mallow (ahihara), garden egg leaf (okpokwa), African spinach (inine), and bush okro (ewedu). They were analyzed for proximate, minerals, vitamins and phytochemical contents. Proximate values maintained the following ranges: moisture 6.73% to 91.22%, protein 7.05% to 32.12%, crude fiber 2.75% to 6.36%, ether extract 3.15% to 6.81%, ash content 2.81% to 6.81% and carbohydrate 48.75% to 72.62%, while energy value ranged from 340.54kcal to 363.07kcal. The vitamin content for these vegetables ranged as follows: vitamin A 0.13.mg/100g to 370.64mg/100g, thiamin (vit B₁) 3.12mg/100g to 7.45mg/100g, riboflavin (vit B₂) 0.08mg/100g to 3.96mg/100g, vitamin B₃ (niacin) 0.17mg/100g to 1.91mg/100g, and vitamin C 39.84mg/100g to 98.75mg/100g. The mineral content, namely, calcium ranged from 45.61mg/100g to 430.69mg/100g, magnesium 11.05mg/100g to 198.14mg/100g, potassium 49.82mg/100g to 708.28mg/100g, sodium 2.36mg/100g to 22.98mg/100g. Also the phytochemical content of the vegetables for phytate ranged from 0.47mg/100g to 3.04 mg/100g, tannin from 0.10 mg/100g to 1.01 mg/100g, saponin from 0.16 mg/100g to 2.56 mg/100g and oxalate from 0.63 mg/100g to 0.72 mg/100g. Result obtained from these vegetables show that they can contribute qualitatively to the nutritional need of the Nigerian population, especially among the rural dweller where vegetables are major food source.
The centuries-old experience of folk medicine, nutritional traditions, and the results of numerous research studies show that plants of the genus Plantago can be used for medicinal, cosmetic, dietetic, and ritual purposes. In the phytochemical composition of Plantago, there is an abundance of biologically active substances (among others, glycosides, flavonoids, polysaccharides, and vitamins) exhibiting beneficial effects and, simultaneously, there is a low content of compounds that may exert a toxic effect. Scientific research has confirmed that Plantago plants have antioxidative, apoptosis-inhibiting, protective, healing-enhancing, spasmolytic, anthelmintic, and antimicrobial properties; they inhibit the development of some tumours, reduce the level of lipids in blood and inhibit tissue glycation. In phytotherapy, leaves, stems, and/or seeds of different plantain species are used. Plantago leaves and seeds are also used to manufacture creams, lotions, and face masks. Different parts of these plants (fresh plant material, extracts, or isolated substances) are also used in human and animal nutrition. Plantain leaves can be eaten like lettuce or added to salads, fried in pastry, used to prepare a tea, juice, or wine. Its seeds are added to cakes, bread, breakfast cereals, ice cream, and drinks, or they are cooked like groats. Animals fed with plantain can live longer and are healthier, while meat derived from such animals is tastier and healthier to humans. Plantago seeds are readily eaten by cage birds. Plantain pollen, produced in large amounts (up to 20,000 pollen grains per 1 stamen of P. lancolata), can cause allergies in sensitive people. Due to a long flowering period of plants of the genus Plantago, the effect of the allergenic factor persists for many weeks. In Poland days with the maximum concentration of airborne plantain pollen most often occur in July.
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