Marijuana use can lead to the development of problem use, known as a ‘marijuana use disorder’, which takes the form of addiction in severe cases. ...... data suggest that 30 % of those who use marijuana may have some degree of marijuana use disorder..... People who begin using marijuana before the age of 18 are 4 to 7 times more likely to develop a marijuana use disorder than adults.
Marijuana use disorders are often associated with dependence—in which a person feels withdrawal symptoms when not taking the drug..... People who use marijuana frequently often report irritability, mood and sleep difficulties, decreased appetite, cravings, restlessness, and/or various forms of physical discomfort that peak within the first week after quitting and last up to 2 weeks... Marijuana dependence occurs when the brain adapts to large amounts of the drug by reducing production of and sensitivity to its own endocannabinoid neurotransmitters.
https://www.drugabuse.gov/publications/research-reports/marijuana/marijuana-addictive
Dr. J. Wesley Boyd, writing for Psychology Today, explains that marijuana is known to be addictive because regular users who stop using this drug experience withdrawal. However, in most cases, the withdrawal is mild compared to other drugs, which falsely leads some users and the public to doubt marijuana’s addictiveness. Dr. Boyd notes that many marijuana users will not display signs of psychological addiction, but some will.For illustrative purposes, Dr. Boyd discusses one patient’s case. The individual, in his late 20s and a construction worker, compulsively smoked marijuana before work and in all the hours after work leading up to his bedtime. Although this individual wanted to stop, he had grown so psychologically addicted to smoking marijuana – it was his main relationship and his only recreational interest – that he was unable to stop without getting professional treatment.
Denial of the extent of the marijuana use may occur as a way to protect the ongoing use. Individuals who are psychologically addicted to marijuana will not want anyone to interfere in the consumption.....
https://americanaddictioncenters.org/marijuana-rehab/is-it-addictive/
Okay. You like the NIH when they say something that confirms your preconceived notions. How about when they say something with which you disagree?
Personally, I don’t trust the NIH at all.
Here is a recent example of some of the crap the NIH is funding:
https://grants.nih.gov/grants/guide/pa-files/PA-17-478.html