Preprint Article Version 1 This version is not peer-reviewed

Phytochemical Properties and Heavy Metal Contents of Commonly Consumed Alcoholic Beverages Flavoured with Herbal Extract in Nigeria

Version 1 : Received: 21 May 2018 / Approved: 23 May 2018 / Online: 23 May 2018 (05:15:55 CEST)

How to cite: Okareh, O.T.; Oyelakin, T.M.; Ariyo, O. Phytochemical Properties and Heavy Metal Contents of Commonly Consumed Alcoholic Beverages Flavoured with Herbal Extract in Nigeria. Preprints 2018, 2018050311 (doi: 10.20944/preprints201805.0311.v1). Okareh, O.T.; Oyelakin, T.M.; Ariyo, O. Phytochemical Properties and Heavy Metal Contents of Commonly Consumed Alcoholic Beverages Flavoured with Herbal Extract in Nigeria. Preprints 2018, 2018050311 (doi: 10.20944/preprints201805.0311.v1).

Abstract

There is proliferation of alcoholic beverages flavoured with herbal-extracts perceived to have medicinal values. Information on the phytochemical and heavy metal contents of these products is scarce. This study assessed the phytochemical properties and heavy metal contents of herbal-extract flavoured alcoholic beverages in major motor parks in Ibadan, Nigeria. The phytochemical properties of the beverages were determined in triplicate using standard methods while the heavy metal contents were assessed using atomic absorption spectrophotometry. Data were analyzed using descriptive statistics and means were compared using ANOVA at p<0.05. The pH range of the beverages was 3.28-6.57 and the alcohol content was 34.0-51.5%. Detected major phytochemicals and concentration ranges were phytic acid (0.72-2.37 mg/g), alkaloids (0.42-4.11 mg/g), flavonoids (0.22-3.64 mg rutin equivalents/g), total phenols (1.13-3.66 mg gallic acid equivalents/g), anthraquinones ((0.74-1.93 mg/g) and triterpenoids (0.74-1.93 mg/g). The phytochemical contents were within the acceptable limits while the heavy metals were: Pb (2.13-4.70 mg/L), Cd (0.06-0.07 mg/L), Co (0.12-0.23 mg/L), Zn (0.14-0.40 mg/L) and Fe (0.72-4.22 mg/L); all except Pb and Cd were within permissible limits. The herbal-extract flavoured alcoholic beverages contain beneficial phytochemicals and traces of heavy metals. Safety awareness of these products for improved consumers’ health would be of public health importance.

Subject Areas

phytochemical; heavy metals; flavoured alcoholic beverages; herbal extract

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