No presente trabalho são apresentados elementos introdutórios à compreensão do estresse oxidativo, como conceitos relativos a radicais livres (RL), espécies reativas de oxigênio (ERO), antioxidantes, possibilidades de biomarcadores e algumas doenças em que o

Traditional phytotherapic products (TPP) use is nowadays common in society. As they are known to be natural products, there is an assumption that the effects are exclusively beneficial and the potential harmful effects are disregarded. As well as adulterations with synthetic drugs capable of masking adverse effects or acting synergistically with biologically active compounds, potentiating their effects, considered by law as fraud. The aim of the present study was to evaluate common TPP and its compliance with the current law regarding labeling, average weight and research on synthetic adulterants using comparative thin layer chromatography. Twenty PTFs were evaluated, of which all failed the labeling assessment, one contained average weight consistent with legislation and there was no evidence of adulteration by increment of synthetic drugs in any of them. Evaluating the quality of a product ensuring its compliance with the legislation is crucial for the reliability of consumers and the credibility of producers.