Independent cannabis laboratories provide quality assurance to the medical and recreational cannabis market in the same manner that independent quality assurance labs nationwide help to guarantee the safety of foods, medicines, and manufactured goods. Cannabis testing labs receive samples from commercial growers, producers of concentrated extracts (oils), and makers of infused products. Depending on the state requirements for compliance and customer interest, these products are assayed for microbiological contaminants, cannabinoid concentrations, pesticide residues, residual solvents, and/or terpenes.