The antioxidant potential of plant
products and pure compounds can be evaluated using numerous
assays. The first step in these examinations is the screening of
the potential activity by different in vitro tests. Each of those is
based on one feature of the antioxidant activity, such as the
ability of scavenging free radicals, the inhibition of lipid
peroxidation, the chelating of transition metal ions (TMI), etc.
However, in order to get relevant data, a single method for
testing antioxidant activities of plant products is not recommended
due to their complex composition (29). Therefore, the
antioxidant activity of the tested essential oils of rosemary and
sage has been evaluated in a series of in vitro tests.