Abstract
"Convolvulus hystrix Vahl" is a plant that has been known to Ancient Egyptians and to Arabs and its root was used traditionally as a purgative. Our attention was directed to the root bark as we observed that the largest part of the plant is deeply impeded underground. The work plan involved testing experimental animals for the influence of aqueous root bark extract on carbohydrate, fat and protein metabolisms as reflected on the growth and relevant laboratory metabolic assessment parameters. Proximate analysis showed high percentages of moisture (85%) and total lipids (7.2%) and surprising amounts of elements such as barium, strontium, rhodium and tellurium (1.7 mg, 3.1 mg, 8 mg and 9.1 mg/g ash, respectively). Random serum glucose value showed a significant decrease in the treated female group (p < 0.05). Serum total proteins of treated female group were found to be increased significantly (p < 0.001), while it was found to be decreased in the relevant treated male group (p < 0.01), together with a significant decrease in blood urea nitrogen (p < 0.05), with a significant increase in the serum creatinine (p < 0.05). Concerning serum fat metabolic parameters, a significant decrease in the serum triglycerides and high-density lipoproteins (p < 0.01 and p < 0.01, respectively) were found. We concluded that the presence of huge amount of polyphenolics such as tannins is responsible for the overall results documented as growth retarding and antinutritional factors. The results were motivating and pointed out to the possible opening of vast areas of research in the field of natural products. We recommend a series of biochemical and pharmacological studies concerning different parts of the plant as well.