Daily Weed, Higher Stress? New Data Stuns

People who smoke or vape marijuana every day may be starting each morning with their bodies already primed for stress, before their feet even hit the floor.

Quick Take

Oregon State University researchers found frequent cannabis users wake up with higher levels of cortisol, the body’s main stress hormone, than people who rarely or never use it.
The rise in the body’s normal post-waking cortisol surge, called the cortisol awakening response, looked about the same between users and non-users.
A separate peer-reviewed study links this higher morning cortisol to cannabis-related problems, not just a random blip.
Researchers stress the finding shows a link, not proof that cannabis use causes the higher hormone levels.

What The Oregon State Study Actually Found

Researchers at Oregon State University tracked salivary cortisol in frequent cannabis users and a comparison group of non-users. Participants gave saliva samples right when they woke up, then again at set times afterward, to capture both their starting hormone level and how it changed in the following minutes.

The results showed frequent users had a higher cortisol reading the moment they woke up compared to non-users. But the jump in cortisol over the next 30 to 45 minutes, the body’s natural morning stress response, looked similar between the two groups. That distinction matters. It means the issue isn’t a bigger morning spike. It’s a higher starting line before the spike even happens.

One outlet summarizing the data reported the gap in numbers: frequent users averaged 12.4 nmol/L at waking versus 10.2 nmol/L for non-users, a difference researchers called statistically meaningful. Lead researcher Anita Cservenka was careful to note the study does not prove cannabis use causes the elevated cortisol, or that elevated cortisol drives people toward cannabis use. The data shows a pattern, not a cause.

Backing From Other Peer-Reviewed Research

The Oregon State findings don’t stand alone. A study published in the journal Cannabis measured diurnal cortisol in adults who use cannabis frequently and found the same pattern: higher cortisol at awakening in users compared to healthy controls, with no significant difference in the awakening response itself. That study went a step further, linking the elevated morning cortisol to cannabis-related consequences, meaning the hormone bump wasn’t just present, it tracked with real problems tied to use.

A review published in Frontiers in Psychology adds more weight, noting that a handful of earlier studies found elevated basal cortisol and adrenocorticotropic hormone levels in regular cannabis users. Another broader review found similar, if more limited, evidence that chronic cannabinoid exposure is tied to possibly elevated basal cortisol, and noted that in one study, these elevated levels persisted for as long as six months after someone stopped using.

Why The Broader Science Is Still Messy

Not every study points the same direction. Some research has found the opposite pattern, a blunted cortisol awakening response or a flattened stress rhythm throughout the day in chronic users, rather than a higher morning baseline. At least one study of high-risk youth found only a weak, non-significant link between cannabis frequency and cortisol. That inconsistency doesn’t erase the Oregon State finding, but it does mean nobody should treat this as a settled scientific fact yet.

There’s also a real question of what’s driving the effect. The current reporting doesn’t detail how researchers accounted for sleep habits, nicotine or alcohol use, body weight, or existing anxiety, all of which can independently move cortisol levels. Until the full study and its methods are published in detail, it’s hard to rule out other explanations hiding inside the data.

🚨 Cannabis may calm stress in the moment, but frequent use could leave your stress system switched on before the day even begins.

A new Oregon State University study found that frequent cannabis users had higher cortisol levels immediately after waking compared with non-users.… pic.twitter.com/h7u0XAgV8G

— Science Joy (@InsideOurBodies) August 9, 2026

What This Means For Frequent Users

None of this means casual or occasional cannabis use is triggering a hormonal crisis. The signal here is specific to frequent, heavy use, and it points to a higher resting stress-hormone level, not a broken stress system. Still, for the millions of Americans using cannabis daily as legalization spreads state by state, this is a useful reality check: something marketed as a stress reliever may be quietly nudging the body’s stress machinery in the opposite direction.

This deserves more scrutiny, not less, especially as more states loosen restrictions and cannabis edges into everyday routines like coffee or a nightcap. Bodies don’t lie about hormones even when marketing claims insist otherwise. Whether cortisol proves to be the smoking gun or just one clue in a bigger puzzle, it’s a signal worth taking seriously rather than shrugging off.