The nature of cassava toxicity; Determinants for cyanide exponsure; Methods for estimation of cyanide exposure; Analysis of cassava products; Analysis of cyanide exposure in humans; Diseases related to cyanide exponsure; Actue cyanide intoxication; Endemic goitre; Neurological disorders; Tropical diabetes; Congenital malformations; Cassava toxicity and food security programmes; Misconceptions.

Foreword; Workshop participants; Current utilization and future potential for cassava; Cassava as food: toxicity and technology; Cyanide toxicity and cassava research at the international institute of tropical agriculture ibadan; The cyanogenic character of cassava (Manihot esculenta); The genetics of cyanogenesis.

Cassava is the most important of the root crops in the tropics and ranks fourth after rice, sugarcane and maize as a source of calorie for human needs. Since its introduction into Africa in the 16th century, cassava has spread throughout sub-Saharan Africa to become one of the dominant starchy staples in the diet of the people. Cassava is a major staple for about half of the Nigerian population and nearly 50 million tonnes of fresh cassava is produced annually in the country. This quantity is enough to meet the calorie requirement of 50 million people at about 200 calories per day. Cassava is important not just as a subsistence or food security crop, but also as a main source of cash income for producing households. Its production and processing provide employment and income for the rural poor, especially women and children. This book discusses the environmental impact cassava may have; the functional and nutritional characterization of cassava flour; cassava bread; other food products developed from using cassava roots and its derivatives; and cassava varieties and their breeding status.

Updates for many countries have made it possible to estimate hunger in the world with greater accuracy this year. In particular, newly accessible data enabled the revision of the entire series of undernourishment estimates for China back to 2000, resulting in a substantial downward shift of the series of the number of undernourished in the world. Nevertheless, the revision confirms the trend reported in past editions: the number of people affected by hunger globally has been slowly on the rise since 2014. The report also shows that the burden of malnutrition in all its forms continues to be a challenge. There has been some progress for child stunting, low birthweight and exclusive breastfeeding, but at a pace that is still too slow. Childhood overweight is not improving and adult obesity is on the rise in all regions. The report complements the usual assessment of food security and nutrition with projections of what the world may look like in 2030, if trends of the last decade continue. Projections show that the world is not on track to achieve Zero Hunger by 2030 and, despite some progress, most indicators are also not on track to meet global nutrition targets. The food security and nutritional status of the most vulnerable population groups is likely to deteriorate further due to the health and socio economic impacts of the COVID-19 pandemic. The report puts a spotlight on diet quality as a critical link between food security and nutrition. Meeting SDG 2 targets will only be possible if people have enough food to eat and if what they are eating is nutritious and affordable. The report also introduces new analysis of the cost and affordability of healthy diets around the world, by region and in different development contexts. It presents valuations of the health and climate-change costs associated with current food consumption patterns, as well as the potential cost savings if food consumption patterns were to shift towards healthy diets that include sustainability considerations. The report then concludes with a discussion of the policies and strategies to transform food systems to ensure affordable healthy diets, as part of the required efforts to end both hunger and all forms of malnutrition.