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Research Roundup

Weekly synthesis of new peer-reviewed studies.

The Largest Study on Cannabis and Mental Health Found No Evidence It Works for Depression, Anxiety, or PTSD

The Lancet Psychiatry meta-analysis is the most comprehensive to date — and its findings challenge the claims driving a $40 billion medical cannabis market.

The medical cannabis industry has built much of its consumer-facing argument on three claims: that cannabis products treat anxiety, that they relieve depression, and that they help with PTSD. These cl

Jun 124 minRead

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02Research RoundupJun 11

No Safe Level: What the Suppressed Federal Alcohol Study Actually Found

The government-commissioned alcohol study, published June 9 in JSAD, found no safe level of drinking. Here is what it actually showed — and what the methodology means for clinical practice.

03Research RoundupMay 22

CDC 2025 Overdose Data: 69,973 Deaths, Down 14% — The Numbers Behind the Headline and the Outliers That Demand Attention

CDC NCHS released 2025 provisional overdose death counts on May 13: 69,973 deaths, down 13.9% — the biggest single-year decline in the modern crisis era. But state-level variation tells a more complicated story.