Pot is becoming more potent, a new study suggests.
In the study, the researchers looked at more than 38,600 samples [5] of illegal marijuana seized by the U.S. Drug Enforcement Administration over 20 years. They found that the level of THC, or tetrahydrocannabinol— marijuana's main psychoactive ingredient — in the marijuana samples rose from about 4 percent in 1995 to about 12 percent in 2014.
Conversely, the level of CBD, or cannabidiol — an ingredient sometimes touted for its potential health benefits [6] — fell from about 0.28 percent in 2001 to less than 0.15 percent in 2014.
But smoking marijuana with high doses of THC may involve a higher risk of negative health effects, such as psychosis [7] orpanic [5] attacks [5], he said.
"Great article- clearly based on the previous posted comments  marijuana severely impairs a person's ability to understand and process information. Their anecdotal evidence continues to validate scientific statistics. " -No2Pot