#312 - Is Moderate Drinking Actually Healthy? | Dr. Tim Naimi & Mike Haney

Alcohol has spent the last 40 years bouncing between two health narratives: a little is good for your heart, or any amount is dangerous. The science doesn’t really support either slogan.

Dr. Tim Naimi has spent decades studying the health effects of alcohol and, just as importantly, why the research is so difficult to interpret. His read of the evidence is less dramatic but more useful: there’s no good reason to start drinking for your health, very low intake may carry little measurable added risk, and risk rises as consumption does. Understanding why earlier studies made moderate drinking look protective helps explain a lot of the whiplashing headlines.

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What We Cover:

Why alcohol is a Group 1 carcinogen causally linked to at least seven cancers
Whether small amounts of alcohol really protect your heart
Why researchers still don’t have a definitive randomized trial of drinking and long-term health
How the “sick quitter” problem, selection bias, and confounding made moderate drinkers look healthier
Why two major recent reviews of alcohol and health produced such different headlines
How the risk changes with dose, including Naimi’s estimate of a 1 in 25 lifetime risk of an alcohol-caused death at 14 drinks per week
Why alcohol consumption is falling, and whether GLP-1 drugs could be contributing

🎙️ About the Guest:

Dr. Tim Naimi is a physician and alcohol epidemiologist who directs the Canadian Institute for Substance Use Research at the University of Victoria, where he is a professor in the Division of Medical Sciences.

📍What Dr. Tim Naimi & Mike Haney discussed:

00:45 — Why the science on alcohol is so confusing
05:48 — How alcohol damages DNA and raises cancer risk
09:43 — Is alcohol actually good for your heart?
14:22 — Why we still don't have a definitive randomized trial
20:30 — The "sick quitter" problem
24:56 — Selection bias and the problem with "healthy" moderate drinkers
29:35 — Why two major reports produced different headlines
31:37 — How alcohol risk changes as drinks per week increase
38:21 — Industry funding and conflicts of interest
46:15 — How much alcohol is too much?
49:48 — Why younger generations are drinking less
51:53 — Health consciousness, GLP-1s, and the decline in drinking

🔗 Helpful Links:

Alcohol Intake and Health Study: No Protective Effect at Low Levels, With Mortality Increasing to 1 in 25 at 14 Drinks Per Week (Journal of Studies on Alcohol and Drugs, 2026) Paper
Review of Evidence on Alcohol and Health (National Academies of Sciences, Engineering, and Medicine, 2025) Report
Association Between Daily Alcohol Intake and Risk of All-Cause Mortality: A Systematic Review and Meta-analyses (JAMA Network Open, 2023) Paper
Do “Moderate” Drinkers Have Reduced Mortality Risk? (Journal of Studies on Alcohol and Drugs, 2016) Paper
Alcohol Abstinence in Drinkers with Atrial Fibrillation (New England Journal of Medicine, 2020) Paper
Canada’s Guidance on Alcohol and Health (2023) Guidance and supporting research
Alcohol and Cancer (World Health Organization / IARC) WHO overview

Watch the conversation: https://youtu.be/8GNmcjPfg7U

Find us on YouTube: ⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠https://youtube.com/levelshealth?sub_confirmation=1⁠⁠⁠⁠⁠⁠⁠⁠

📲 Connect:

Connect with Dr. Tim Naimi at University of Victoria

👋 Who we are:

Levels helps you understand your metabolic health with personalized data, expert guidance, and tools that connect your daily choices to measurable changes in your body. Our goal is to help you make better decisions about food, exercise, sleep, and long-term health.

Look for new shows every month on A Whole New Level, where we have in-depth conversations with thought leaders about metabolic health.

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