contamination of dietary supplements is extremely rare, it is helpful
to be aware of possible causes so that outbreaks are prevented.
can occur anywhere in the production cycle. Pesticide residues and
heavy metal pollutants can be introduced to botanicals by growers,
or they can seep in from a neighbor's field or the groundwater.
Soil can be contaminated from previous uses. Bacteria, which have
filled every conceivable ecological niche, can infiltrate crops.
can be contaminated by the chemical processes used to extract them
from rocks and ores. Raw materials might be stored in places that
previously held chemicals or other undesirable substances. The manufacturing
process itself could expose a product to whatever herbs or other
materials were previously run through a particular machine.
establish and follow procedures for ensuring that contaminants do
not enter the plant in the form of raw materials and are not introduced
during processing. Practices such as testing of materials, regular
cleaning of machinery, and tracking of materials by lot number are
used to ensure purity. Standardized good manufacturing practices
(GMPs) also include guidelines for ensuring cleanliness.
exemplary safety record of dietary supplement products shows that
manufacturers have done an excellent job of ensuring that dietary
supplements remain uncontaminated.