Business dealing with marijuana is rapidly developing by states that have recently legalized the plant which is not only the product for smoking. Food that is made of cannabis is in great demand. Mechanisms of perception of psychoactive and other substances in cannabis are quite different if it is eaten or smoked. The fact is that in the process of digestion your liver communicates with tetrahydrocannabinol, and at the output there is another compound which is lighter and it penetrates faster through the blood-brain barrier. Therefore food that is prepared of cannabis may compete with the traditional way of its using. The impact is more powerful and long. When smoking, active substances do not pass through your stomach and liver, they are adjudged directly into the bloodstream through the lungs. The smoker “gets high” faster, but the action is shorter and less intense. The strangest thing is that when smoking your circulatory system absorbs about 60% of psychoactive substances, and in oral use it is maximum of 10-20%. But as the liver “modifies” normal tetrahydrocannabinol, anyway the food prepared of cannabis is stronger. The effect can last for a few hours!