Determination of metals in medicinal plants highly consumed in Brazil

In this work, samples of the medicinal plants: Boldo (Peumus boldus), Castanha da Índia (Aesculus hippocastanum), Chá Verde (Camelia sinensis), Erva Cidreira (Melissa officinalis), Espinheira Santa (Maytenus ilicifolia), Guaraná (Paullinia cupana), Maracujá (Passiflora sp.), Mulungu (Erythrina velutina), Sene (Cassia angustifolia) and Valeriana (Valeriana officinalis) were evaluated BY using the Neutron Activation Analysis technique (NAA- k0) in order to determine the levels of metals and other chemical contaminants. The results showed the presence of non essential elements to the human body. The diversity of chemical impurities found even at low concentration levels, considering the potential for chronic toxicity of these elements, reinforces the need to improve the implementation of good practices by growers and traders, and the hypothesis of lack of quality control in plant products

Phytotherapy: an introduction to its history, use and application

There has been a great advance in the pharmacognosy field, which has increased the use of medicinal plants by health professionals and practitioners of folk medicine. This systematic review explored the history and the present day application of phytotherapeutic medicines. We searched the databases Cochrane Library, Embase, Lilacs, PubMed, Scielo and a specialized bibliography. We concluded that there are many therapeutic potentialities in the use of phytotherapeutic medicines and medicinal plants. We also concluded that despite the increasing number of publications in the field each year, there is still a lack of reviews and meta-analyses that could promote a better integration of the knowledge produced. In addition, research about pharmacological interactions and multidisciplinary studies may promote a quicker and safer process from the workbench up to the clinical trials.Diante do avanço que vem ocorrendo na área da farmacognosia, decorrente do aumento do uso de plantas medicinais na medicina popular e por profissionais da saúde, este trabalho apresenta uma revisão sistemática sobre a história dos fitoterápicos e sobre sua aplicação na atualidade. Foram realizadas buscas nas bases de dados Cochrane Library, Embase, Lilacs, PubMed, Scielo e em bibliografia especializada. Concluiu-se que, apesar da quantidade de estudos publicados crescer a cada ano, há ainda escassez de revisões e meta-análises que promovam melhor integração do conhecimento produzido. Pesquisas contemplando interações farmacológicas e trabalhos multidisciplinares podem acelerar os estudos em bases mais seguras, desde a bancada até os ensaios clínicos.Centro Universitário de Belo Horizonte Faculdade de MedicinaUniversidade Estadual Paulista Júlio de Mesquita Filho Faculdade de CiênciasUniversidade Federal de São João del Rei Departamento de Química, Biotecnologia e Engenharia de BioprocessosUniversidade Estadual Paulista Júlio de Mesquita Filho Faculdade de Ciência