Elevated Morning Cortisol Linked to Frequent Cannabis Use in Young Adults
Recent research from Oregon State University indicates that regular cannabis users exhibit higher cortisol levels immediately upon waking. The study suggests frequent use may disrupt the biological systems responsible for regulating daily stress responses.
Key takeaways
- Frequent cannabis users show higher baseline cortisol levels immediately upon waking compared to non-users.
- The study suggests a link between regular use and changes in the body's neuroendocrine stress response system.
- Cannabis usage rates among young adults have nearly doubled over the last 15 years, with 10% using it at least 20 times monthly.
- Elevated morning cortisol may serve as a future neurobiological marker for identifying problematic cannabis use patterns.
What Happened
A study led by Anita Cservenka at Oregon State University found that individuals who use cannabis frequently start their day with significantly higher levels of cortisol compared to non-users. Published in the journal Cannabis, the research examined the Hypothalamic Pituitary Adrenal (HPA) axis, which manages the body's neuroendocrine response to stress. While the standard morning increase in cortisol—known as the Cortisol Awakening Response (CAR)—remained similar between both groups, those who used cannabis frequently showed elevated hormone levels at the moment of waking.
Background
Cortisol, often termed the stress hormone, is produced by the adrenal glands to manage metabolism, blood sugar, and blood pressure. While essential for short-term stress management, chronically high levels are linked to increased risks of heart disease, depression, and anxiety. The study arrives as cannabis use among young adults aged 19 to 30 has surged; currently, 29% report usage within the last 30 days, a figure that has nearly doubled over 15 years. Furthermore, over 10% of this demographic now uses cannabis 20 or more times per month.
Why It Matters
The research identifies waking cortisol levels as a potential neurobiological marker for problematic cannabis consumption. Although many individuals use cannabis to alleviate stress, the findings suggest that frequent use could interfere with the body's natural regulatory systems. The discrepancy between these results and previous studies—which reported a blunted morning cortisol rise—indicates that the biological interaction between cannabis and the HPA axis is complex and may be influenced by specific sample characteristics or analytical methods.
Key Facts
- Frequent cannabis users exhibit higher cortisol levels at the point of waking than non-users.
- The study focused on the Cortisol Awakening Response (CAR), measured 30 minutes after waking.
- Usage among adults aged 19–30 has risen to 29% in the last 30 days, double the rate from 15 years ago.
- More than 10% of young adults use cannabis at least 20 times a month.
- The research was conducted by Oregon State University and published in the journal Cannabis.
What Happens Next
The researchers emphasize that these findings do not yet establish a direct cause-and-effect relationship. Future studies will need to track the same groups of individuals over longer periods to determine if frequent cannabis use drives the cortisol elevation or if elevated cortisol levels influence the frequency of use. Further investigation is required to reconcile why this study found elevated baseline levels while others observed a blunting of the morning hormone surge.
Sources reviewed
Project Chintan independently synthesized and analyzed information cross-checked across the sources listed above.
