Botanical food supplements may be derived from secondary
food sources (e.g., soy extracts containing isoflavones, tomato
extracts rich in lycopene) or derived directly from herbs and
spices (e.g. garlic oil, rosemary extracts, green tea extracts). The
nature (species, part of the plant used), their preparation and
conditions of use (length of time, periodicity of use) determine
their impact on safety. For example, some PFS may be intended
to be used only for short periods, e.g. for weight control or
stimulation of t