Vernonia amygdalina Delile (Asteraceae): An Overview of the Phytochemical Constituents, Nutritional Characteristics, and Ethnomedicinal Values for Sustainability

This chapter focuses on the ethnomedicinal values of bitter leaf (Vernonia amygdalina Delile (Asteraceae)) as well as the nutritional and phytochemical properties of the plant. The chapter discusses ongoing pharmacognostic and clinical research works on the plant as well as herbal products containing bitter leaf or its active ingredients, toxicity and safety considerations, and commercial values. V. amygdalina is a tropical perennial plant native to West Africa. The plant is widely valued for its culinary, medicinal, and nutritional uses and has a distinctive bitter taste. Its bitter taste, once moderated, adds a unique flavor profile to traditional dishes and soups. Bitter leaf is often exchanged as a symbol of hospitality and goodwill during traditional events in West Africa. In traditional African medicine, bitter leaf has a long history of use for its health benefits. It is used as a remedy for various ailments including malaria, fever, gastrointestinal issues, pain relief, immune system boosting, antimicrobial and anti-parasitic properties, nervous system regulation, cardiovascular health maintenance, digestive aid, fever reduction, diabetes management, stomachache, and others. These health benefits are linked to the phytochemical constituents of the plant. Prominent phytochemicals in bitter leaf include vernodalin, vernolepin, vernonioside, vernomygdin, and others. Further research to ensure the conservation of the plant and the sustainability of practices associated with it is paramount.