Chalmers Dale uses propolis collected from Australia, which is certified to be free from lead and heavy metals. The fact that propolis comes from tree and plant sources collected by the bees, makes it extremely important that there's no contamination from either pesticides, or heavy metals. These pesticides or heavy metals, once included in the propolis, are often difficult to remove and there's no known process that can purify propolis without removing certain important components of propolis, making it less effective.
The propolis extract that Chalmers Dale uses has been purified using a unique process of cryogenic filtration. The extract is subjected to extremely low temperatures, where impurities can be crystallised and filtered out. The result is an extract that is pure in nature, possessing all the attributes of Propolis without the impurities.
