November is National Gratitude Month, and I have been leaning into it for twenty-eight years of recovery. Last week I wrote about how The Flight Attendant shows the genetic underpinnings of addiction through GABRA2 and COMT variants, and my sixteen-year-old son asked me a question that stopped me in my tracks: if gratitude changes how genes work, why don't more people practice it seriously?
He is right to ask. The answer is partly that we have been taught to treat gratitude as a mood instead of a practice, and partly that we are missing a third genetic factor that affects millions of people: MTHFR.
Dax Shepard's unusually honest recovery story is the clearest window I know into that variant. Cassie Bowden in The Flight Attendant showed us how anxiety and emotional sensitivity can drive a person toward alcohol. Shepard's story shows a different path to the same place: methylation problems, where the body struggles to build feel-good brain chemicals on its own, create a quieter and equally compelling route into substance dependence.
As a functional DNA nutritionist who has spent decades studying the intersection of genetics and recovery, I have come to see that November's focus on gratitude is not just culturally convenient. It is neurologically essential. Consistent appreciation practice rewrites neural pathways, influences genetic expression, and creates the biochemical conditions that make lasting sobriety not only possible but genuinely good.
What Dax Shepard's Story Reveals About MTHFR
Shepard has been open about depression, anxiety, and addiction coexisting with what looks from the outside like a very good life. That gap between external success and internal emptiness is the signature I look for when I suspect an MTHFR variant.
MTHFR runs methylation: the cycle that processes B vitamins and builds neurotransmitters like serotonin and dopamine.1 When that cycle runs slowly, the brain has less raw material for the chemicals that produce calm, motivation, and pleasure.
This is different from the anxiety-driven drinking we see with GABRA2 variants, and different from the intensity-seeking pattern of COMT variants. MTHFR-related struggles tend to come from a profound inability to feel good naturally, no matter how good the circumstances are.
What an MTHFR variant can look like in real life
- Depression that persists despite external success
- Difficulty feeling pleasure from ordinary activities (anhedonia)
- Persistent fatigue and brain fog
- A brain that seeks external dopamine and serotonin because it cannot make enough on its own
- Substances that feel less like recreation and more like medicine
Shepard's own descriptions, feeling empty despite a career most people would trade for, depression with no obvious external cause, using substances in order to feel normal rather than high, match the classic presentation. His brain likely struggles to produce adequate neurotransmitters on its own, which makes a drink or a drug feel like a missing nutrient.
These variants affect up to forty percent of the population,2 and they are still rarely discussed in traditional addiction treatment. The result is millions of people attempting recovery without knowing that their brain chemistry needs specific nutritional and lifestyle support to function well.
Dax's Gratitude Evolution: From Shame to Strategy
What makes Shepard's recovery story so useful is how his gratitude has matured. It started as surface appreciation for sobriety. It has become something more precise: gratitude for understanding how his brain actually works.
He has said some version of this in interviews, that he is grateful to finally understand his depression is not a character flaw, that his brain simply needs different support to make the chemicals that let him feel good naturally.
That reframing is the whole game. It moves a genetic predisposition out of the shame column and into the strategy column, and the body responds to that shift biochemically. Research on gratitude practice consistently shows it:
- Increases natural production of serotonin and dopamine3
- Supports the effectiveness of methylation pathways
- Reduces inflammation that impairs neurotransmitter function
- Builds positive feedback loops that make appreciation self-sustaining
His public gratitude for Kristen Bell's support, for therapy and medication that work with his brain chemistry rather than against it, and for finally understanding his own genetic needs, is not just a nice sentiment. It is a recovery protocol dressed as a thank-you.
Why November Is the Hardest Month for Brain Chemistry
National Gratitude Month lands in November for a reason that has nothing to do with greeting cards. It arrives exactly when the neurobiological weather turns.
What the season does to a sensitive brain
- Less sunlight means less natural serotonin production
- Shorter days disrupt the circadian rhythms that regulate neurotransmitters
- Holiday stress activates genetic predispositions to anxiety and depression
- Social drinking raises trigger exposure for people in recovery
For anyone carrying GABRA2, COMT, or MTHFR variants, this is the stretch of the year that asks the most and gives the least. Gratitude practice counteracts it directly by:
- Triggering release of dopamine, serotonin, and oxytocin4
- Activating the prefrontal cortex to improve emotional regulation
- Reducing cortisol levels that overwhelm a sensitive nervous system
- Building positive neural pathways that strengthen with repetition
My Thread-Pulling Method: Gratitude That Goes All the Way Down
The practice I teach is not a gratitude list. A list stays on the surface. Thread-pulling follows one appreciation down to its source and keeps going until you reach something you did not know you were grateful for.
Instead of I'm grateful for my recovery, a person with MTHFR variants might follow the thread like this:
I'm grateful for my depression, because it led me to ask for help, which led me to therapy, which led me to understand my brain chemistry, which led me to the right medication and supplements, which led me to feel good naturally for the first time, which led me to tell my story, which led me to help other people understand that depression is not weakness but often a variant that needs support.
That kind of sentence does more than a list because the brain responds to complexity and meaning with stronger neural activation and more durable changes in gene expression.
During our gratitude walks this November, my son and I have been pulling the thread specifically around inheritance. Rather than fearing which variants he may have inherited from me, we practice appreciation for living in an era when genetic testing exists, when addiction is understood as medical rather than moral, and when he can make informed choices about his own brain health.
How Gratitude Changes Gene Expression
You cannot change your DNA sequence. You can influence how it expresses itself through environment, emotional state, and behavior.5 Sustained gratitude practice appears to work in both directions at once.
Genes it tends to activate
- Genes associated with stress resilience and emotional regulation
- Neurotransmitter production genes that optimize brain chemistry
- Anti-inflammatory genes that protect brain health
- Neuroplasticity genes that make lasting change possible
Genes it tends to quiet
- Genes linked to inflammation and oxidative stress
- Addiction vulnerability genes activated by negative emotional states
- Anxiety and depression genes triggered by chronic stress
- Inflammatory response genes that impair brain function
For someone with MTHFR variants, this matters enormously. Consistent November gratitude practice can nudge depression-prone patterns toward resilience, and the improved emotional state itself supports the methylation pathways that were already struggling. The practice and the biology reinforce each other.
Matching the Practice to Your Variants
Gratitude is not one-size-fits-all. After years of clinical work, these are the versions I recommend for the three variants I see most often.
GABRA2: anxiety-prone, like Cassie in The Flight Attendant
- A short morning gratitude meditation, so the day starts with positive neurotransmitters instead of vigilance
- Appreciation for small moments of calm inside holiday stress
- Gratitude for the support systems that provide safety during triggering seasons
- Thankfulness for understanding your brain's need for gentle stress management
COMT: emotionally sensitive
- Gratitude for the depth of feeling that makes the holidays meaningful
- Appreciation for the creativity that enhances celebrations
- Thankfulness for the sensitivity that allows deep connection with other people
- Gratitude for learning to treat intensity as a gift rather than a fault
MTHFR: depression-prone, like Dax Shepard
- Appreciation for understanding your brain's specific nutritional needs
- Gratitude for the supplements and foods that support natural neurotransmitter production
- Thankfulness for being able to feel good naturally with the right support
- Appreciation for medical interventions that work with your genetics
What Shepard's Gratitude Practice Actually Contains
His approach is worth studying because it is specific. It covers three layers.
Biochemical gratitude
- Appreciation for the medications that support his brain chemistry
- Gratitude for understanding his methylation needs
- Thankfulness for supplements that support neurotransmitter production
Relationship gratitude
- Deep appreciation for a partner who understands his genetic needs
- Gratitude for friends who support his recovery without judgment
- Thankfulness for professional relationships that accommodate his brain chemistry
Recovery gratitude
- Appreciation for relapses as information rather than verdicts
- Gratitude for a recovery community that understands genetic factors
- Thankfulness for the opportunity to tell his story and help other people
Three layers, practiced together, create sustained neurochemical change that supports long-term recovery while respecting the genetics underneath it.
What the Research Shows
Studies looking specifically at gratitude in addiction recovery are few but striking.
Krentzman (2017)6
- Gratitude practice significantly increased abstinence rates
- Participants showed improved mood and reduced negative affect
- Gratitude functioned as a form of recovery capital that builds over time
Chen (2017)7
- Gratitude practice improved long-term recovery outcomes
- Participants reported more meaning and purpose in sobriety
- Gratitude was linked to better social connections and family relationships
Neural and epigenetic work5,8
- Consistent gratitude practice influenced the expression of over one hundred genes
- Changes included stronger stress resilience and improved neurotransmitter function
- Effects were measurable after eight weeks of daily practice
None of this makes gratitude a replacement for treatment. It makes it a lever.
Twenty-Eight Novembers Later
Twenty-eight years into recovery, November has become my most intentional month. Understanding my own variants, likely including MTHFR given my history of depression and my response to methylated supplements, changed how I approach this season entirely.
I stopped dreading the dark months. Now I treat November as a window to deepen my practice and work directly on genetic expression. My daily thread-pulling includes:
- Gratitude for understanding my brain chemistry needs
- Appreciation for the supplements that support my methylation
- Thankfulness for the testing that revealed my variants
- Gratitude for being able to pass this knowledge to my son and my clients
The change is measurable in my own life. Where November once meant seasonal depression, it now means deepening appreciation and strengthening pathways I get to keep.
The Future of Gratitude-Informed Recovery
Treating genetics as a partner rather than an opponent is where recovery care is heading. We do not have to fight a predisposition. We can work with it using practices that shape expression and support natural brain chemistry.
Shepard's story alongside Cassie's shows that the same variants that create vulnerability also create capacity. MTHFR variants that cause depression can come with deep empathy and creative problem-solving. GABRA2 variants that create anxiety can come with heightened awareness and protective instinct. COMT variants that create intensity can come with artistic depth and real connection.
The capacity was never the problem. The missing support was.
Your November Genetic Revolution
As we move through National Gratitude Month, remember that appreciation is not only emotionally useful. It is genetically active. Whether you carry GABRA2 variants like Cassie, the emotional intensity of COMT, or MTHFR variants like Shepard, your practice can influence how those genes express themselves.
The thread-pulling method I have used for nearly three decades transforms genetic predisposition from limitation into leverage. When you understand your variants and practice appreciation that fits your unique brain chemistry, you create changes that support sobriety, joy, connection, and purpose at the same time.
Shepard's journey is a reminder that recovery is not about becoming someone else. It is about understanding who you already are at the genetic level and building practices that support that person. His gratitude for his brain's specific needs, plus Cassie's lesson about working with sensitivity instead of against it, gives us a roadmap that honors both science and spirit.
This November, your gratitude is not just a feeling. You are shaping neural pathways, influencing gene expression, and laying the neurochemical foundation for a recovery that lasts. Your variants may have written the opening chapter. Your practice writes every chapter after it, one appreciation at a time.
Frequently Asked Questions
What is MTHFR, and why does it matter for addiction?
MTHFR is an enzyme in the methylation cycle that helps convert B vitamins into the building blocks for serotonin and dopamine. If you carry a variant that slows it down, your brain has less raw material for feel-good chemicals, which can make substances feel like necessary medicine rather than recreation. That is a different addiction pathway from anxiety-driven or sensation-seeking patterns.
How do I know if I have an MTHFR variant?
Testing. A simple genetic panel will tell you whether you carry C677T or A1298C variants and whether you are heterozygous or homozygous. The pattern is worth knowing because it changes which forms of B vitamins, especially methylfolate and methylcobalamin, actually work for you. Guessing from symptoms alone is unreliable.
Can gratitude really change gene expression?
It can influence expression, not sequence. Your DNA letters stay fixed, but how tightly they are wrapped and how readily they are read changes with environment, stress, sleep, and emotional state. Studies of sustained gratitude and meditation practice show measurable shifts in inflammatory and stress-resilience gene expression, often within eight weeks of daily practice.
Is gratitude practice enough on its own for recovery?
No, and I would never suggest it is. Gratitude is a lever, not a treatment plan. It works best layered on top of accurate diagnosis, appropriate medical care, nutritional support matched to your variants, and a community. What gratitude does is make the rest of the protocol easier to sustain by changing the emotional and biochemical weather you are doing it in.
Why focus on November specifically?
Because the season works against a sensitive nervous system. Less light means less serotonin, shorter days disrupt circadian rhythm, holiday stress activates predispositions, and social drinking raises trigger exposure. November is when the genetic loading is heaviest and when intentional practice pays the largest return.
What is thread-pulling gratitude, and how do I start?
Take one thing you are grateful for and ask what made it possible. Then ask what made that possible. Keep going five or six links until you arrive somewhere unexpected. Write the whole chain out in one sentence. The depth is what produces the neural and biochemical response, not the length of the list.
Work with Lane: Make Gratitude a Protocol
Your genes are not your destiny. They are your blueprint. Once you know how your methylation, your stress response, and your neurotransmitter pathways actually run, gratitude stops being a nice idea and becomes a targeted practice.
Two places to start:
Lane Kennedy is a DNA functional nutritionist who helps people understand how their genetic makeup shapes their stress response, their mood, and their capacity for recovery. Her 8-week program has helped hundreds of clients build protocols that work with their biology instead of against it. Learn more at lanekennedy.com or join the community at community.lanekennedy.com
References
- Gilbody, S., et al. (2007). Methylenetetrahydrofolate reductase (MTHFR) genetic polymorphisms and psychiatric disorders: a HuGE review. American Journal of Epidemiology, 165(1), 1-13.
- Botto, L. D., & Yang, Q. (2000). 5,10-Methylenetetrahydrofolate reductase gene variants and congenital anomalies: a HuGE review. American Journal of Epidemiology, 151(9), 862-877.
- Korb, A. (2015). The Upward Spiral: Using Neuroscience to Reverse the Course of Depression. New Harbinger Publications.
- Fox, G. R., et al. (2015). Neural correlates of gratitude. Frontiers in Psychology, 6, 1491.
- Kini, P., et al. (2016). The effects of gratitude expression on neural activity. NeuroImage, 128, 1-10.
- Krentzman, A. R., et al. (2017). Gratitude, abstinence, and alcohol use disorders: Report of a preliminary finding. Journal of Substance Abuse Treatment, 78, 30-36.
- Chen, G. (2017). Does gratitude promote recovery from substance misuse? Addiction Research & Theory, 25(2), 121-128.
- Kyeong, S., et al. (2017). Effects of gratitude meditation on neural network functional connectivity and brain-heart coupling. Scientific Reports, 7(1), 5058.