Abstract
Kola and kola-containing beverages are among the most consumed products globally for their stimulatory and energy-boosting potentials. The precise impact of kola nut consumption on various biological indices of consumers remains debatable, necessitated by the fact that the phytochemical compositions of kola nuts are dependent on a range of factors. This study investigated the impacts of a 28-day administration of a methanolic extract of C. acuminata on the body weight and serum cholesterol indices of adult male albino rats (Wistar strain). The quantitative photochemical compositions and lethal dose (LD50) of the extract were determined using standard bioassay procedures. Rats were randomized into four experimental groups that received various concentrations of the extract: 0, 100, 150, and 200 mg/kg. Results show an LD50 of 3101.37 mg/kg for the extract, whereas flavonoids and tannins were the most abundant phytochemicals. In addition, extract administration caused a dose-dependent reduction in body weight, while significant elevations in total serum cholesterol levels were recorded in rats that received 100 and 150 mg/kg of the extract. These suggest that kola nut consumption may negatively impact on body weight and cholesterol metabolism.
References
REFERENCES
Adesida, F. A., Oluyole, K. A., Agulanna, F. T., Oladokun, Y. O. M., Adelusi A. A., Agboola, L.O., Ogunwolu, Q. A., Ujunwa, E. I. and Mustopha, F. B. (2021). Economic evaluation of kola-nut processing and marketing in South-West, Nigeria. Moor J. Agri. Res. 22: 149 -158.
Ajiboye, A. and Afolayan, O. (2009). The impact of transportation on agricultural production in a developing country: a case of kola nut production in Nigeria. Int. J. Agric. Econ. Rural Dev. 2: 49-57.
Asogwa, C. N., Onyeka, C. C., Odii, E. C., Ekeh, F. N., Ikele, C. B., Mgbenka, B. O. and Eyo, J. E. (2014). haematological and cortisol dynamics in albino rats stimulated by intake of methanolic extract of Cola acuminata. World J. Med. Sci. 10(4): 384-391.
Beattie, G. B. (1970). Soft drinks flavours. Their history and characteristics. I. Cola or 'Kola' flavours. The Flavour Industry, pp. 390-394.
Birner, J. (1969). Determination of total steroid bases in Solanum species. J. Pharm. Sci. 58(2): 258-259.
Brunner, J. H. (1984). Direct spectrophotometric determination of saponin. Anal. Chem. 42: 1752-1754.
Dawra, R. K., Makkar, H. P. S. and Singh, B. (1988). Protein-binding capacity of microquantities of tannins. Anal. Biochem. 170: 50-53.
DeBenedictis, J. N., de Kok, T. M. and van Breda, S. G. (2023). Impact of processing method and storage time on phytochemical concentrations in an antioxidant-rich food mixture. Antioxid. 12: 1252.
Erinfolami, A., Eegunranti, A., Ogunsemi, O., Oguntuase, A., Akinbode, A. and Erinfolami, G. (2011). Prevalence and associated risk factors of kola nut chewing among secondary school students in Osogbo, Nigeria. Mental Illness, 3: e6.
Ewenighi, C., Dimkpa, U., Onoh, L., Onoh, G., Ezeugwu, U. and Dibia, J. (2016). Chronic kola nut consumption and its effect on uric acid level and lipid profile. J. Mol. Pathophysiol. 5(2): 23-27.
Haque, M. R. and Bradbury, J. H. (2001). Total cyanide determination of plants and foods using the picrate and acid hydrolysis methods. Food Chem. 77:107-114.
Heppelm, L. A., Porterfield, V. T. and Peake, E. G. (1947). The lipotropic activity of caffeine, theobromine and theophylline. Arch. Biochem. Biophys. 15: 439-443.
Igbinovia, E. N. S., Ugwu, A. C., Nwaopara, A. O., Otamere, H. O. and Adisa, W. A. (2009). The effects of Cola acuminata on arterial blood pressure. Pak. J. Nutr. 8(2): 148-150.
Ikegwuonu, F. I., Aire, T. A. and Ogwuegbu, S. O. (1981). Effects of kola-nut extract administration on the liver, kidney, brain, testis and some serum constituents of the rat. J Appl. Toxicol. 1(6): 292-294.
Jacob, D. E., Nelson, I. U. and Izah, S. C. (2023). Cola acuminata: phytochemical constituents, nutritional characteristics, scientific validated pharmacological properties, ethnomedicinal uses, safety considerations, and commercial values. Herbal Medicine Phytochemistry. Springer Nature Switzerland AG, pp 141–179.
Kapcum, C. and Uriyapongson, J. (2018). Effects of storage conditions on phytochemical and stability of purple corn cob extract powder. Food Sci. Technol. Campinas. 38(1): 301-305.
Kishi, K., Ochiai, K., Ohta, Y., Uemura, Y., Kanatani, K., Nakajima, K. and Nakamura, M. (2002). Highly sensitive cholesterol assay with enzymatic cycling applied to measurement of remnant lipoprotein-cholesterol in serum. Clin. Chem. 48(5): 737-741.
Lorke, D. (1983). A new approach to practical acute toxicity testing. Arch. Toxicol. 54(4): 275-287.
Łukowski, A., Jagiełło, R., Robakowski, P., Adamczyk, D. and Karolewski, P. (2022). Adaptation of a simple method to determine the total terpenoid content in needles of coniferous trees. Plant Sci. 314: 111090.
Machado, M., Antunes, W. D., Tamy, A. L. M., Azevedo, P. G., Barreto, J. G. and Hackney, A. C. (2009). J. Exerc. Sci. Fit. 7(2): 91-97.
Obidike, I. R., Aka, L. O. and Ezema, W. S. (2011). Effects of caffeine extract from kola nut on body weight, hematology, sperm reserve and serum enzyme activities in albino rats. Comp. Clin. Pathol. 20: 625-630.
Ogutuga, D. B. A. (1975). Chemical composition and potential commercial uses of kola nut, Cola nitida, Vent. (Schott and Endlicher). Ghana J. Agric. Sci. 8: 121-125.
Osaro, I. E., Chinedu, I. and Yakubu, O. E. (2024). Proximate and phytochemical constituents of ethanolic extract of seeds of Cola acuminata and Cola nitida. AJSTEA. 2(2): 129-144.
Purseglove, J. W. (1997). Tropical crops cotyledons. Longman.
Purseglove, J.W. Tropical Crop Di-cotyledons, John Wiley & Sons Inc, New York, 1968.
Quarcoo, T. (1969) Development of kola and its future in Nigeria. Proceedings of the Agricultural Society of Nigeria, Volumes 6.
Quarcoo, T. (1973). A handbook on kola. CRIN, Ibadan, Nigeria, 90pp.
Salahdeen, H. M. and Alada, A. R. A. (2009). Effects of caffeine and ethanolic extract of kolanut on glucose uptake in the canine hindlimb at rest and during contraction. Nig. J. Physiol. Sci. 24(1):33-45.
Tedeschi, P., Brugnoli, F., Merighi, S., Grassilli, S., Nigro, M., Catani, M., Gessi, S., Bertagnolo, V., Travagli, A., Caboni, M. F. and Cavazzini, A. (2023). The effect of different storage conditions on phytochemical composition, shelf-life, and bioactive compounds of voghiera garlic PDO. Antioxid.12(2): 499.
Touati, N., Tarazona-Díaz, M. P., Aguayo, E. and Louaileche, H. (2014). Effect of storage time and temperature on the physicochemical and sensory characteristics of commercial apricot jam. Food Chem., 145: 23-27.
Umoren, E. B., Osim, E. E. and Udoh, P. B. (2009). The comparative effects of chronic consumption of kola nut (Cola nitida) and caffeine diets on locomotor behaviour and body weights in mice. Nig. J. Physiol. Sci. 24(1): 73-78.
Uwabunkeonye, O. C., Ezeabara, C. A., Horoiheoma, C., Denis, U. C. and Aziagba, B. O. (2015). Comparative phytochemical and proximate compositions of Cola acuminata (P. Beauv.) Schott and Cola nitida (Vent) Schott and Endl. Plant. 3(3): 26-29.
Zhishen, J., Mengcheng, T. and Jianming, W. (1999). The determination of flavonoid contents in mulberry and their scavenging effects on superoxide radicals. Food Chem. 64(4): 555-559.

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