The therapeutic effect of each preparation is conditioned by its absorption (intestinal or pulmonary) and by the specific metabolites produced within the human body. Important is the difference between oral and inhalation preparations. In fact, inhaled cannabinoids and terpenes arrive via the lungs directly into the blood stream, whereas the absorption of ingested compounds is significantly conditioned by the condition of the intestine and liver. These factors, which affect the absorption and metabolism of cannabis, may result in different effects on the body, even when using the same type of cannabis.