Authors Guidelines

The manuscript should be formatted to include the following,









Manuscript Submission:

The authors are requested to prepare their manuscripts as per the instructions/specifications given below. It should be noted that the review process and acceptance of manuscript depend on the quality, significance, and relevance of the work presented in the manuscript. Adhering to instruction to authors as presented below will hasten the peer and editorial review process. Therefore, authors are strongly encouraged to read these instructions carefully before preparing/submitting their manuscript for publication. A statement by the corresponding author confirming that the manuscript has not been submitted to any other journal for publication is required in the forwarding letter for submission of an article.

Authors should note that submission of a manuscript to TNPR journal for publication implies that the same work has not been previously published nor under consideration for publication elsewhere. Authors, in their cover note to the editor, have to clearly state whether the manuscript shall be considered as a Research Paper, Case Report, Short Communication or as Letter to the editor. Review Articles within the stipulated scope of the journal is also acceptable for publication.

Authors publishing results from in vivo experiments involving animals or humans should clearly indicate, by including a statement to this effect,  in the Materials and Methods section, whether due permission for the conduct of such experiments was obtained, from the relevant institutional ethics committee.

Manuscript categories

  • Full length research articles

  • Review articles

  • Short communications

  • Letters

Manuscript should be submitted online at journal website (  or sent by email to:  Electronic submission should also include a covering letter. The covering letter should include a certificate that “The submission has not been previously published nor is it before another journal for consideration; or an explanation has been provided in Comments to the Editor”.

Publication Language

Language of publication is only English. British English spelling and punctuation is preferred.

 Peer Review

All submitted papers are reviewed by invited reviewer(s), the Editor-in-chief or members of editorial board. Reviewer’s comments and/or reviewed MS will be sent to corresponding author as email attachment for response and/or correction. Final decision regarding publication of paper will be made by the Editor-in-chief as soon as possible.

Manuscript Preparation

The preferred format of all manuscripts is MS Word. Figures, images (in JPEG, TIFF or SFC format), illustrations and tables should be inserted in the manuscript immediately they are mentioned. Manuscripts must be typed, double-spaced on A4 (8.5″ × 11″) paper size with 1 inch margins and should be arranged in the following order: Title, Abstract, Keywords, Introduction, Experimental (or Materials and Methods), Results, Discussion (or Results and Discussion), Conclusion, Acknowledgement (if any), References.

Title Page

It should have Title, Name(s) of author(s) and their affiliations i.e. postal address, phone no., corresponding author’s email address(es). The title must be as brief as possible, comprehensive and descriptive. Each author must provide their full name (surname first followed by name initials e.g. Akah PA, Akunne TC …) followed by their address in normal face lower case. The Corresponding Author of the manuscript must be marked with an asterisk, with his/her phone numbers and e-mail address at the bottom left corner of the title page. If any of the co-authors are from different organizations, their addresses too should be mentioned and indicated using numbers after their names.


The abstract should be non-structured and should start on a new page after the title page and should present the reason for the study, the methodology, the main findings, and principal conclusions and should not be more than 300 words. All the three categories, Review Articles, Research papers and Short Communications should have an Abstract.


Keywords (3-6) are to be provided by the authors separated by a ‘coma”.


The introduction section should represent the scope, objective and novelty of the research work. This should start on a new page and should clearly indicate the objective(s) of the study. It should provide an adequate background, avoiding a detailed literature survey or a summary of the results.

 Materials and Methods

This section should contain information about the materials and the methods adopted to carry out the research work like animals, chemicals and animal ethical committee permission, software used, and procedures followed etc. Chemical compounds should be named according to IUPAC or Chemical Abstracts. The units and dimensions should be expressed according to the metric system and SI units. It should include concise details on the methodology adopted, enough to repeat the experiment. Extracts and/or fractions tested for in-vitro or in vivo biological activities should be chemically defined, at least by means of the results of preliminary phytochemical screening. Complete formulation details of all crude drug mixtures and extracts should be mentioned. The plant name should be fully mentioned when cited first, and the authors are asked to add the details regarding its identification, voucher herbarium specimen number and name of the herbarium institution where it has been deposited.

Abbreviations should be preceded by words for which they stand at the first appearance in the manuscript. The statistical method and the level of significance chosen should be clearly stated.


All results presented in tabular or graphical form shall be described in this section. Figures (photographs, drawings, diagrams and charts) should be clear, easily legible and cited consecutively using Arabic numerals in the text (Figure 1, Figure 2…etc.). Legends should contain sufficient detail to permit figure interpretation without reference to the text. Tables must be concise and cited consecutively using Arabic numerals in the text (Table 1, Table 2…etc.). Each table should be typed on a separate sheet. The title of the table should clearly indicate the nature of the contents and enough detail should be included in the footnote to facilitate interpretation without reference to the text. Use horizontal rules only. All Tables and figures must have a title and a legend to make them self-explanatory and they should be numbered. Identify statistical significance using superscripts (* and **) following the data (*P < 0.05, **P < 0.01).

Discussion and Conclusion

Discussion and conclusions should contain a critical review of the results of the study with the support of relevant literature. It can end with brief conclusions.


It should contain the information regarding any research grant support or the assistance of colleagues.

Conflict of Interest:

Authors should dedicate a section to report any possible conflict of interest in the execution and reporting of the studies. Where no conflict of interest exists, authors should state so explicitly in the section.


References should be organised in alphabetical order. All papers cited in the text should be given in parentheses using the (author surname, year) format and in chronological order e.g. (Nworu et al, 2008; Akah et al., 2010) except when the authors are mentioned, e.g., “….according to the study of Nworu and Akah (2015)”. Use complete name of the journal for non-indexed journals. Information from manuscripts submitted but not accepted should be cited in the text as “unpublished works” with written permission from the source. Avoid citing a “personal communication” unless it provides essential information not available from apublic source, in which case the name of the person and date of communication should be cited in parentheses in the text.

The complete reference list should be provided at the end of the text according to the format and examples as shown hereunder:

Journals: Journals: Author (last name) AB (initials), Author BB (year). Title of Article, Journal name,  volume: page numbers.

Nworu CS, Akah PA, Okoye FBC, Esimone CO (2010). Aqueous extract of Phyllanthus niruri (Euphorbiaceae) enhances the phenotypic and functional maturation of bone marrow-derived dendritic cells and their antigen presentation function. Immunopharmacology and Immunotoxicology  32(3): 393-401.

Akah PA, Osigwe CC, Nworu CS (2010). Reversal ofCoumarin-induced toxicity by the extracts and fractions of Ageratum conyzoides. Asian Journal of Medical Sciences  2(3): 121-126.

Books: Author AB, Author BB, Author CC, Title of Book, Ed, vol, Publisher, City, year, page numbers.

Nworu CS, Akah PA (2015). Study Guide and Self Evaluation in Pharmacology- Multiple Choice Revision Questions with Answers. Great AP Express Publishers Ltd, Nsukka, Nigeria. ISBN 9783647199,  pp. 1-267

Contribution in a book:

Nworu CS, Akah PA. (2019) Experimental Design and Research Methodology; In: A Handbook of Techniques in Experimental Pharmacology, Ozolua RI and Bafor EE (Eds). Mindex Publishing Company Ltd, Benin, Nigeria, pp. 11-30

Note: If more than one references by the same author(s) published in the same year are cited in the manuscript, the references should be arranged chronologically using alphabets e.g.  a, b, c

The editorial board reserves the right to condense or make necessary changes in the length of manuscript.

Article Processing Charges

Trends in Natural Products Research is a peer-reviewed, open access journal and is supported by Natural Products Research Group in Department of Pharmacology and Toxicology, UNN,  as well as article processing charges paid by authors and contributors to the journal. There are no printing, subscription or membership charges for any author. For every accepted manuscript, the author(s) will pay a nominal cost of 120 USD (United States Dollars) irrespective of the number of pages. Authors within Nigeria will have to pay a nominal manuscript processing fee of twenty thousand naira (N 20,000.00) only for an accepted manuscript irrespective of the number of pages. This nominal cost represents sustainability cost of manuscript processing, maintenance of published works in secured databases, website maintenance and upgrading, and to meet various overhead expenses.

Galley Proof

Proofs will be sent to the corresponding author as PDF file. To avoid delay in publication, only necessary changes should be made, and proofs should be returned promptly within 48 hours of receipt by email.


Authors can download PDF file of their published paper from journals website.


Abstracting and Indexing

TNPR is currently been considered for abstracting and indexing by various major international organizations.

Frequency of Publication

For now, each volume of TNPR will be published in three issues per year. There are plans to increase the frequency in due course. Evaluation of submitted manuscript will be rapid, within 14 days of initial submission.



Authors submitting a manuscript do so on the understanding that if the manuscript is accepted for publication, copyright in the article, including the right to reproduce the article in all forms and media, shall be assigned exclusively to TNPR. If copyright material is involved, the author(s) work must obtain permission from the copyright owner. Authors are responsible for obtaining permissions to reprint previously published figures, tables, and other material.  The work should not be published elsewhere in any form without the written permission of the TNPR and no part of this publication may be reproduced, translated or transmitted in any form or by any means (electronic, mechanical or otherwise) without permission from the TNPR.


Human experiments should be performed only in accordance with the ethical standards provided by the responsible committee of the institution and in accordance with the Declaration of Helsinki (as revised in Edinburgh 2000), available at All investigations on human subjects must include a statement that the subject gave an informed consent. Patient anonymity should be preserved. Photographs need to be cropped sufficiently to prevent human subjects being recognized (or an eye bar should be used). Animal experiments should be in accordance to the guidelines for the care and use of laboratory animals provided by the institution at which the research was carried out.


All authors should have participated sufficiently in the work to take public responsibility for the content.

Inquiries may be directed to:

The Managing Editor,
Trends in Natural Products Research,
C/o Natural Products Research Group,
Department of Pharmacology and Toxicology, University of Nigeria, Nsukka
Nsukka 410001, Enugu State, NIGERIA