Most of what I know about alcohol, I learned by living it. I know what nine beers a day did to my sleep, my mornings, my work, and my sense of who I was. What I never had was the other half of the picture. The part happening at the level of receptors and stress hormones and inflammation, in a place I can’t see and was never taught to look.
Dr. A Leslie Morrow spent 35 years in that place. She’s a John Andrews Distinguished Professor Emerita at UNC Chapel Hill, published more than 238 scientific articles, and served 25 years as associate director of the Bowles Center for Alcohol Studies. Her work on GABA receptors and the body’s own neurosteroids led to clinical trials for alcohol use disorder and to brexanolone for depression.
She could have spent this hour on technical science. Instead she chose to tell us the one thing she thinks matters most, and it reframed how I understand my own decade of drinking. Alcohol leaves inflammation behind. Not the kind you feel in a sore knee. A specific kind, in your brain and your organs, that makes anxiety louder, pain sharper, focus harder, and craving stronger. It can last long after the last drink. And there are things you can do about it.
If you have ever wondered why stopping felt harder than it should have, this conversation offers an answer that has nothing to do with willpower.
Show Notes
[00:00] Why this conversation is different
Instead of one person’s story of what they let go, we went into the biology underneath all of our stories.
Dr. Morrow’s background: PhD in neuroscience at UC San Diego, postdoctoral training at NIH, 35 years at UNC.
I came in with a list of questions I’ve carried for years, including why cutting back fails for people who are trying as hard as they know how.
Key Insight: She chose depth over jargon from the first minute. “What I would like to kind of do is rather go through a lot of technical science that may or may not be useful to people is tell you what I think has been the most important discovery.”
[02:53] The dose matters, and so does what’s already in you
One or two drinks does something very different in the body than four, six, or nine.
Alcohol is a tiny molecule that acts at many sites. At low doses it acts one way. At high doses it’s a toxin.
What alcohol does to you also depends on what you already have going on. Anxiety, stress, and pain change the picture before the first sip.
Alcohol doesn’t act only on the brain. It acts on the whole body.
Key Insight: “If you add a toxin to a situation that’s already working abnormally, it’s going to have different effects than if you add that toxin to a physiology that’s normal.”
[04:24] The discovery she calls the most important
A lifetime of heavy drinking creates inflammation in the brain and in every organ.
That inflammation interferes with normal function, which is part of why control is so hard and craving is so strong.
It makes your original reason for drinking worse. If you drank because you were anxious, the inflammation makes you more anxious. If you drank because of pain, it makes the pain worse.
We know this from studying the brains of people who died with alcohol use disorder. Those brains show high levels of inflammatory cytokines and chemokines, which Dr. Morrow calls “danger molecules.”
This is a specific kind of inflammation. It is not the same as arthritis or a common headache.
Key Insight: “So basically, it’s making all the triggers stronger.”
[10:26] Exercise, the tool with the strongest science
Researchers made rats dependent on alcohol at doses similar to what humans drink, and the rats developed the same inflammation in liver and brain that humans do.
Then they let the rats exercise. Before drinking, during drinking, or after stopping. Every version lowered the inflammatory molecules in the brain and the liver.
Dr. Morrow was clear that this work came from other labs, not hers, and that the science behind it is strong.
The type doesn’t matter. Walking, yoga, weights, whatever you enjoy. What matters is frequency.
Key Insight: “Just make sure you do it more than four days a week, more than half of the days of the week.”
[13:36] Leaky gut, the TLR4 pathway, and licorice root
High doses of alcohol cause leaky gut. Everyone has endotoxin in their gut, and it’s fine while it stays there. When it leaks into the bloodstream, it switches on a pathway called toll-like receptor 4 (TLR4).
TLR4 is what produces the inflammatory molecules. Once it’s on, it keeps turning itself back on and switches on other pathways too.
Those inflammatory molecules change how the brain works and how your normal neurotransmitters behave, which leads to extra anxiety, depression, pain, and craving.
A group at UNC found a natural blocker of this pathway in licorice root, a compound called glycyrrhizin. In animal models it reduced voluntary drinking, blocked brain inflammation, and reduced anxiety-like behavior. Human trials are about to begin.
No medication currently targets TLR4 directly. Natural compounds can’t be patented, so drug companies have little reason to fund them through trials.
Key Insight: “Once you start that inflammatory process, particularly in the brain, it’s not easy to stop it.”
[20:04] Pregnenolone and refilling your own supply
Your body already makes steroids that keep those inflammatory pathways in check. Pregnenolone and allopregnanolone.
Chronic stress drains them. Chronic drinking drains them. When your stress system is depleted, your natural defense against inflammation is depleted too.
Pregnenolone is the precursor to the other protective steroids, and it blocks TLR4 activation directly. It’s available over the counter.
In a Yale clinical trial with about 300 people, eight weeks at 300 mg a day normalized stress responses and reduced stress-induced craving, alcohol craving, and alcohol intake.
You don’t have to take it forever. Two months may be enough, unless a binge, a stressful stretch, or a toxin exposure brings the inflammation back.
Key Insight: “We have an endogenous steroid that helps us relax. We have an endogenous steroid that helps us sleep. We have an endogenous steroid that protects our stress system.”
[21:38] How a neuroscientist ended up studying alcohol
A college professor got her excited about science. That led to neuroscience, then to a graduate lab studying brain receptors.
During her postdoc at NIH she discovered that these natural steroids are powerful activators of GABA receptors. In the last eight to ten years her lab found they also block inflammatory pathways.
She turned to alcohol because alcohol activates GABA receptors too. At one or two drinks, that’s the source of the “ah” feeling, the relief people chase.
Part of the reason was practical. NIAAA funded the work. Then she started noticing how many people around her, including in her own family, had struggled with this.
She called alcohol probably the biggest public health problem in the world, and pointed out that NIAAA is the smallest institute with the smallest budget at NIH.
Key Insight: “I think it has to do with the fact that for a long time, people thought of this as a moral problem, not as a real biological problem.”
[29:15] What lingers after the hangover, and the short list
The hangover itself is mostly the immediate effects of alcohol. The things that stay after the hangover lifts are more likely to be inflammation.
Her list of those lingering effects: brain fog, anxiety, heightened sensitivity to pain, difficulty focusing. They can last a week or much longer.
Inflammation is hard to remove once it starts. In postmortem brains, the levels tracked with lifetime alcohol use.
If you already carry inflammation, even a few drinks a week keeps it going. If you don’t have any and you drink two or three a week, you might be fine.
Her short list for lowering it: exercise, pregnenolone, glycyrrhizin from licorice root. For supplements she stressed buying from a reputable, independently tested source.
She also mentioned that inflammation plays a big role in depression, through the same pathway.
Now retired, her focus is legacy work. Getting this research to the public, because the drug companies won’t.
Key Insight: “When you feel like you’re living with those things and they just don’t ever leave you, to me that’s a sign that you have inflammation that you need to address. And then you’ll be much better able to change your behavior the way you want to.”
Key Quotes
“What a lifetime of excessive alcohol consumption does is causes a lot of inflammation in the brain and in all the organs, in fact.” — Dr. A. Leslie Morrow
“If you started out drinking because you were anxious or stressed, well, those inflammatory changes just make you more anxious and more stressed.” — Dr. A. Leslie Morrow
“It’s really hard to get rid of that inflammation. It’s really hard. Once it starts, it can stay your whole life.” — Dr. A. Leslie Morrow
“Exercise actually counters the effects of inflammation. And we don’t know exactly how it does that, but we know that it does.” — Dr. A. Leslie Morrow
“Maybe you have one bender and you’re beating yourself up because you did that. Well, instead of that, just increase your exercise for the next few weeks.” — Dr. A. Leslie Morrow
Resources Mentioned
Exercise — More than four days a week, whatever form you enjoy. The strongest evidence on the list.
Pregnenolone — Over-the-counter supplement. The clinical trial dose was 300 mg a day for eight weeks, with about 100 mg a day mentioned for continued use. Buy from a reputable, independently tested source.
Glycyrrhizin (licorice root) — Around 400 mg a day. Dr. Morrow noted it shouldn’t affect blood pressure in most people at that dose, but if you have high blood pressure you need to watch that closely. Human trials are about to begin.
The TLR4 pathway — The inflammatory pathway alcohol switches on through leaky gut.
Allopregnanolone and brexanolone — Her discoveries on allopregnanolone led to brexanolone as a treatment for depression.
Bowles Center for Alcohol Studies at UNC Chapel Hill — Where this research happened.
One important note from me: Dr. Morrow is a scientist sharing research, and nothing here replaces a conversation with your own doctor. Before adding any supplement, especially if you take medication or have a blood pressure condition, talk to a professional who knows your health history.
Where to Find Dr. Morrow
Dr. Morrow retired from UNC in February 2025 and is now focused on getting this research into the hands of the people it can help. She invited questions directly: send them to her on Substack. You can also find her faculty page and full publication list through the Bowles Center for Alcohol Studies at UNC Chapel Hill.
What This Means for the Next 30 Days
For years I blamed myself for the fog. The mornings I couldn’t focus. The anxiety that showed up for no reason. The sense that I was working twice as hard for half the output. I thought that was a character problem.
It was a recovery problem. My system was carrying something it couldn’t clear on its own, and every drink kept topping it up.
Dr. Morrow’s research says something hopeful inside all that hard news. The things that lower inflammation are things you can start doing this week. Stop adding to it. Move your body more than half the days. Give your system a real stretch of time without the thing that keeps reactivating the pathway.
That’s what The Sober Creative Reset is built for. Thirty days, one on one, with weekly 60-minute sessions. We work on the daily practices that let your system come back online, and on the beliefs that made the drink feel necessary in the first place. It isn’t about counting days. It’s about restoring the loop between recovery and the work you actually want to make.
I take a few new 1:1 clients a month, and most people start within two weeks.
If the fog has become so normal you stopped noticing it, thirty days is long enough to find out what’s underneath.
Thank You
A heartfelt thank you to Shah Huzaifa, Bonnie Bluewater 🐦, Jeji, KarenC-Book Collector📚⚖️🗽🗳️🧿♒️, Martinique Akinfosile, and many others who joined us live for this conversation, and to Dr, A Leslie Morrow on, and for four decades of work and for the generosity of bringing it here in plain language. Your presence and engagement make these conversations possible.
