Avoid physical exertion
during the 2 hours prior to a crop and try to be calm
, because stress alters the concentration of some parameters. You should also avoid coffee and alcohol
within 4 hours prior to harvesting.
There are some analyses that require advance preparation, see the Package Insert for Harvests
, or the Lab to learn about the care to take before you make them, as well as the appropriate way to collect the sample.
The collection of some samples such as urine, feces must be carried out in suitable containers, so as to have the certainty that these containers were not subjected to any specific treatment or additives, which could alter the results of analyses.