Nutritional Composition And Cyanogenic Content Of Gari Samples In Osun State

Project and Seminar Material for Food and Nutrition

Nutritional Composition And Cyanogenic Content Of Gari Samples In Osun State


Six samples of Cassava product (garri) were collected from different processing centres in Osun state and subjected to proximate and cyanogenic analysis to determine their nutritional composition and safety for human consumption. At the end of the analysis, the results is vary because of climate, weather, and nutrient of the soil. All the samples met the standard recommended by IITA 2005 and FSAN 2004. And thus safe for human consumption.

List of Tables

  • Consumption pattern by zone and cassava product
  • Daily consumption of cassava per capital
  • Frequency of cassava consumption
  • Daily processing capacity by scale of operation and product
  • Cassava demand estimates by president’s initiative
  • A conservative estimates of demand
  • Middle of the road, estimate of potential demand for cassava
  • The nutritional supplement provides by gari
  • Proximate analysis (%) and cyanogene content of gari sample

Table of Contents

Preliminary Page(s)

  • Tittle page
  • Dedication
  • Certification
  • Acknowledgement
  • Abstract
  • Table of content

Chapter One

  • 1.0 Introduction

Chapter Two

  • 2.0 Literature Review
  • 2.1 Cassava
  • 2.11 Composition of cassava
  • 2.12 Economic impact
  • 2.13 Uses
  • 2.14 Biofuel
  • 2.15 Animal feed
  • 2.16 Ethnomedicine
  • 2.17 Various ways ofn using starch industries
  • 2.18 Food use processing and toxicity
  • 2.19 Harvesting
  • 2.20 Post harvest handling and storage
  • 2.21 Pest
  • 2.22 Processing and utilization
  • 2.23 Future targets
  • 2.24 New initiative
  • 2.25 The way forward
  • 2.26 Gari
  • 2.26.1 Types of gari
  • 2.26.2 Variation
  • 2.26.3 Nutritional composition of gari
  • 2.3 Cyanogenic glucosides
  • 2.31 The compounds
  • 2.32 Sources
  • 2.33 Human health effects
  • 2.34 Neurological effect
  • 2.35 Estimates of dietary exposure
  • 2.36 Factor influencing risk
  • 2.37 Safety assessments
  • 2.38 Safety and regulation limits

Chapter Three

  • 3.1 Materials
  • 3.2 Method
  • 3.21 Proximate analysis and cyanogenic content of gari samples
  • 3.21.1 Determination of moisture
  • 3.21.2 Determination of ash
  • 3.31.3 Determination of crude fibre
  • 3.21.4 Determination of fat
  • 3.21.5 Determination of protein
  • 3.21.6 Determination of cyanogenic glucosides

Chapter Four

  • 4.1 proximate analysis (%) and cyanogenic content of gari sample
  • 4.2 Discussion

Chapter Five

  • 5.1 Conclusion
  • 5.2 Recommendation
  • Reference

Chapter One

1.0 Introduction

Cassava is an important source of food in Africa as an important source of raw materials for the industries. More than any other crop in Africa, cassava has assumed great importance in Africa Agriculture and food supply. The reasons for this are because of the following features which cassava posses.

  1. Cassava is highly adaptable to wild Agro-ecological conditions and gives relatively high yield on poor soil.
  2. Cassava has high drought tolerance and can survive the long dry season characteristics of many parts of Africa.
  3. Cassava has no fixed planting and harvesting time and its production require relatively low skill.
  4. Cassava is relatively tolerant to common pest, which devastate other crops easily.

In spite of the above advantages, cassava has some limitations which affects is utilization and militates against its marketing beyond its region of propagation. These limiting factors include the following;

  1. After harvesting, cassava deteriorates very fast than other roots and tuber i.e. it has poor post harvest keeping qualities.
  2. Cassava is bulky to transport and storage.
  3. Cassava, like some other crops e.g. sorghum contains some potentially toxic component, referred to as cyanogenic glucoside or linamarine
  4. Cassava has low protein content.

Because of the above limitations, there are some myths that are being propagated by enemies of cassava. Some of these myths are

That cassava is an inferior food crops. This is lie being propagated about cassava. The propagation of this myth support their carat with the fact that cassava consume it for its high energy content therefore because cassava is an important source of carbohydrate and energy it is wrong to claim that it is an inferior food.

Another myth is that it is a woman’s crop. The reason for this myth is the believed that only women are involve in the cultivation and processing of cassava. It is known today however that men and women, children and adult are involved in cultivation and processing of cassava.

That cassava is a dangerous and toxic crop. This is a lie too because cassava contains no toxin. Cassava only contains some cyanogenic glucosides e.g. linamarine which when hydrolyzed yield the toxic hydrogen cyanide.

It should be noted that there are other crops apart from cassava e.g. sorghum which contain cyanogenic glucoside and these other crops are not been labeled as dangerous crop. within the past 30years, however and mostly through the effort of IITA, cassava cultivars with low cyanogenic glucoside content have now been popularized.

Consequently, this project is designed to achieve the following aim and objectives.

  1. To collect samples of gari from Gari processing centres in Osun State.
  2. To evaluate the nutritional and cyanogenic contents of Gari samples collected.
  3. To compare the results of evaluation with the standard.

Chapter Five

5.0 Conclusion and Recommendation

5.1 Conclusion

Although the results of proximate analysis and Cyanogenic content of gari samples varied because of climate, weather and nutrient of the soil. The moisture content of all samples are higher than the limit recommended by the IITA,2005. improved processing method has been proposed as a suitable strategy to reduces moisture content and cyanide in cassava product. However, nutrients in all the gari samples analysed are in substantial quantities and Cyanogenic contents are generally lower and hence gari samples in Osun State are nutritious and lower in Cyanogenic glucosides.

5.2 Recommendation

Based on this work, Gari produced in Osun State is hereby recommended for all and sundry in Nigerian and abroad alike.

Nutritional Composition And Cyanogenic Content Of Gari Samples In Osun State

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Nutritional Composition And Cyanogenic Content Of Gari Samples In Osun State


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