In contrast to recent analyses of hemp based veterinary supplements done in USA, two of 29 products were above the limit human consumption with 2296 µg/mL of Pb and 2.104 µg/g of As and two others were in the limit of detection with 0.209 µg/g of Cd and 0.157 µg/g of Pb with the others under the limit of detection \cite{Wakshlag2020}.
Discovering the quantities of different biomaterials are useful for further calculations of the production process and costs.
The difference of the soil types in heavy metal accumulation is something to clarify for sustainable cultivation protocol for reduced amount of heavy metals in the biomass and most amount of biomass used.
The translocation of heavy metals directly into the inflorescence is unclear since previous studies are analysing the leaves with inflorescences or just leaves but not inflorescences as such. Outside one study \cite{Husain_2019}, in an interview of the author \cite{leafly} inflorescence is claimed not to accumulate heavy metals . Meanwhile it is known that heavy metal stress increases the phenolics content \cite{ahmad2015effective} and specificly cannabinoid content \cite{Husain_2019}. This could be clarified to further reduce the heavy metal content of the end products.