Marijuana use during adolescence has been linked to a range of negative effects on growth and development. While the impact of marijuana on growth is a subject of debate, there is evidence to suggest that heavy, chronic use can lead to shorter stature in boys. A study published in the Journal of Clinical Endocrinology and Metabolism found that boys who smoked marijuana before and during puberty were on average 4.6 inches shorter by the time they were 20. The researchers concluded that cannabis use was associated with a decrease in height of about 0.7 inches in males and 0.6 inches in females.
However, the relationship between marijuana use and height is not fully understood. A systematic review of literature published in 2018 found that no available research met their eligibility criteria for examining the effects of cannabis on pubertal growth. The authors noted a "significant gap in existing literature regarding the effects of cannabis use on puberty" and highlighted the need for better quality studies to support the conclusion.
It is important to note that the impact of marijuana on growth is likely influenced by a variety of factors, such as the amount of marijuana used, frequency of use, and the adolescent's overall health. In addition to height, other aspects of growth, such as weight and body mass index (BMI), may also be affected by marijuana use.
There is also evidence to suggest that heavy, chronic marijuana use during adolescence can impact brain development and cognitive function. Rats exposed to THC before birth, after birth, or during adolescence demonstrate problems with specific learning and memory tasks later in life. A study published in the Journal of Neuroscience found that exposure to THC can alter neural circuitry and behavior in mice, leading to addictive-like behaviors. Additionally, studies have shown that chronic exposure to THC can affect mood and emotional development in adolescence, increasing the risk of depression, anxiety, and suicide ideation.
While some studies have found an association between marijuana use and shorter stature, other research has failed to find a causal relationship. Other factors, such as nutrition and genetics, may also play a role in determining a child's height.
In conclusion, the impact of marijuana on growth is a complex issue influenced by numerous factors. While studies have provided some evidence to suggest that marijuana use during adolescence can lead to shorter stature and cognitive impairments, more research is needed to fully understand the long-term effects of marijuana on growth and development. In the meantime, it is important forparents and caregivers to monitor their children's use of marijuana and seek advice from healthcare professionals if concerns arise.
