Understanding the Role of Genetics in Alcoholism
Is Alcoholism Genetic?
While genetics plays a role in the development of addiction or substance use disorders, they are not the sole factor.
Each person’s relationship with alcohol is unique. According to the National Institute on Alcohol Abuse and Alcoholism, the chances that each individual has of developing alcohol use disorder (AUD) depend not just on the genetics of alcoholism and their biological family history, but also on the unique stresses and risk factors of each individual, environmental influences, and the support available.
Understanding genetic influences and external factors can help individuals and family members better understand addiction.
How Much of a Role Do Genetics Play in Developing Alcoholism?
While concrete numbers are difficult to determine, the role of genetics in the development of addiction is only about half of the picture, studies from the NIH suggest genetics plays approximately 45-65% of a role in alcoholism development.
However, those with a family member or parent who has had an addiction are not guaranteed to develop the disease themselves. Likewise, not having a family history of alcohol or drug abuse does not mean that a person is somehow “immune” to the disease.
There are also genetic components that may indirectly affect a person’s relationship with drugs or alcohol.
While a person may not have a family history or genetic predisposition to developing addiction, a family history of mental health disorders can still increase the risk of alcohol-related challenges. Mental health disorders like anxiety, depression, bipolar disorder, and more can be connected to drinking alcohol and unhealthy alcohol consumption.
Genetics is certainly an important consideration and can lead to an increased risk of developing addiction, but they are not the sole determining factor. While a genetic history of addiction can lead to an increased vulnerability to developing AUD, there are always environmental factors that equally contribute to each journey and story.
How Do Genetic Factors Affect Alcohol Metabolism?
The body uses the enzymes aldehyde dehydrogenase (ALDH) and alcohol dehydrogenase (ADH) to process alcohol; however, genetic variation can affect these enzymes, changing the way they effectively process the effects of alcohol.
These enzymes work together to determine how fast an individual can process alcohol in the body, the buildup of toxic byproducts in the body, and even a person’s physical reactions to drinking any amount of alcohol.
While some people may be able to metabolize alcohol quickly, others may have a genetic component that makes this process slower or more intense, leading to stronger reactions to even small amounts of alcohol, which can all raise or lower the risk of developing addiction based on personal experiences.
However, repeated or excessive alcohol use, binge drinking, or heavy drinking can all still be difficult for the body to process, regardless of genetic factors, leading to:
- Slowed metabolism over time
- A damaged liver
- The inability to process and expel further alcohol
- Negative effects on a person’s physical, mental, and emotional well-being
Genetic Variants and Alcohol Use
What Are the Key Genetic Variants Linked to Alcoholism?
There is no single gene related to alcoholism or addiction, multiple factors and parts of the genome all come together to create a person’s unique genetic predisposition to alcohol use, its effects, and the risks of addiction.
The most common genes associated with alcohol addiction include:
- ALDH1B: Responsible for converting alcohol in the body into acetaldehyde
- ALDH2: Expels the newly formed acetaldehyde from the body
Likewise, certain parts of the genome are associated not necessarily with the metabolism of alcohol, but instead with how alcohol affects the brain and dopamine reward pathways.
Dopamine is the “reward chemical” that is released to reinforce a behavior, making a person “feel good” for using alcohol. The parts of the genome most closely associated with the brain’s dopamine reward pathways and alcohol’s impact on them include DRD2, GABRA2, and OPRM1.
Do ADH1B and ALDH2 Impact Alcohol Metabolism?
Yes, substantial alcohol research has concluded that ADH1B and ALDH2 are directly associated with a person’s ability to metabolize alcohol.
However, there can be variants in these enzymes from person to person, creating unique experiences and relationships with alcohol.
Does a Genetic Predisposition Guarantee Alcohol Addiction?
No, having a genetic predisposition to alcohol addiction does not mean that any individual will definitely develop addiction themselves.
However, it is still crucial information to have, and can increase the likelihood of addiction if a person is regularly engaging in alcohol use.
If you or your family are concerned about a loved one’s use of alcohol, exploring personal factors alongside a professional like Reflection Family Interventions, as well as determining any family history of addiction, can help inform the most appropriate addiction treatment program and personal needs for a loved one in healing.
Environmental Factors and Alcoholism
Does the Environment Influence Alcohol Use Disorders?
Yes, a person’s environment plays a crucial role in the development of addiction, creating influences that are just as strong, or sometimes stronger, than a genetic predisposition.
A person’s environment is not just their physical home. Rather, it is a combination of the home atmosphere, workplace, academic or social cultures, peer pressure or influences, and more. These factors inform beliefs, relationships, perspectives, and even opportunities related to every part of life, including perceptions of alcohol.
For some, an environment may celebrate alcohol use, making a person see it as less of a harmful substance, or expose an individual to alcohol use during adolescence, leading to further complications or challenges with alcohol in the future.
Other environments may create highly stressful atmospheres, leading to persistent feelings of anxiety, depression, or even trauma, all of which can inform maladaptive alcohol use as a coping strategy, as well as underlying mental health needs that need to be addressed through evidence-based care, psychiatry, and dual diagnosis alcohol treatment.
However, a person’s environment can equally provide support for navigating challenges. Supportive environments can provide a strong support system, encourage open and honest communication, and allow for emotional expression and vulnerability, meaning that each person’s journey overcoming alcohol use and addiction can be very different.
Reflection Family Interventions works with families to create a supportive environment and atmosphere to encourage this kind of sustained healing. These positive and supportive environments can help prevent alcohol addiction or address concerns with alcohol quickly through early intervention.
A large part of each healing journey is not only addressing the immediate effects of addiction, but working with family members and loved ones to create a supportive environment at home that celebrates and encourages healing and change.
Can a Person With No Family History Develop Alcoholism?
Absolutely. Nobody is “immune” to addiction of any kind, from alcohol or opioid use.
Even with no family history of alcoholism, there are still a myriad of other risk factors, from environment and opportunity to underlying needs. Addiction is always the result of multiple factors, with genetics being only part of the equation.
What Lifestyle or Social Factors Increase Risk?
High-stress or fast-paced home or working environments, lack of practiced coping skills for navigating stress, difficulty with self-care, or feeling isolated from friends, family, and loved ones can all increase risk.
Likewise, engaging in social circles centered around drinking, binge drinking, exposure to alcohol at a young age, feeling unsupported in emotional expression, and underlying mental health needs can all increase the risk of addiction in daily life.
Environmental or social stresses, combined with difficulty accessing effective support, can lead to further alcohol use and addiction.
Interaction Between Genetics and Environment
How Does Epigenetics Affect Alcoholism Risk?
Alcohol use and life experiences can change a person’s epigenetics, leading to changes in dopamine reward pathways that “reward” a person for drinking alcohol and alterations in stress response, impulse control, decision-making, or emotional resilience.
Epigenetics is how a person’s genes are expressed. While the genetic code of these genes can remain consistent, the way they act can vary from person to person and even change over time.
A person’s epigenetics can change depending on personal life experiences, from early exposure to alcohol to persistent feelings of stress, trauma, and even after prolonged use of alcohol, creating a cycle of use that can be difficult to break without outside support and intervention.
How Does Early Exposure to Alcohol Impact Future Addiction?
Not only can the consumption of alcoholic drinks early lead to changes in brain chemistry and decision-making skills, but it can also alter a person’s perception of alcohol use, seeing regular use, or even heavy drinking, as something that is “normalized.”
How Do Mental Health Conditions Influence Susceptibility?
Addiction and mental health disorders are closely connected, and those living with one can be at an increased risk of developing the other.
For some, underlying mental health conditions can lead to desperate attempts to manage their effects, looking for an escape from persistent feelings of anxiety, depression, or self-doubt. Alcohol use can be a fast-acting way to “push down” these feelings, leading to repeated use and using alcohol rather than developing other, healthier coping strategies.
However, alcohol use can lead to further emotional dysregulation and lowered emotional resilience, leading to addiction while still experiencing the challenges of mental health disorders, leading to further alcohol use and the development of addiction.
Prevention, Treatment, and Recovery
Can Genetic Testing Determine My Risk for Alcoholism?
There is no reliable genetic test that can accurately determine your exact risk of addiction.
Rather, exploring your genetic history is just part of the consideration. While it can inform increased risk, it is still important to also look at environmental factors, mental health disorders, behaviors, coping skills, and expectations around alcohol use to determine the role of addiction in daily life.
When Is Intervention Necessary?
Intervention may be necessary if a loved one:
- Is experiencing alcohol withdrawal symptoms when alcohol is not available
- Past attempts to connect or discuss addiction or healthcare options have been unsuccessful
- Persistent thoughts of craving alcohol
- Continues to use alcohol despite mounting negative consequences
- Experiences worsening personal relationships or consequences on physical health, mental health, or in the workplace
- Refuses treatment or does not see treatment as “necessary”
An intervention is a powerful tool to help a loved one realize the effects of addiction on their own lives, the lives of loved ones, and the healing options available, empowering an individual to seek treatment and help families take a unified approach to change and healing.
Interventions can be crucial for families to not only explore local and effective detox or inpatient healing options, but also empower families to explore the effects of addiction at home, developing the skills to be effective supports and challenging misconceptions about addiction.
Should I Seek Professional Intervention for a Loved One?
If conversations or questions turn into confrontations or arguments, or if past attempts to connect with a loved one with support have been unsuccessful, a professional intervention may be necessary.
A professional interventionist can help moderate conversations to avoid escalation, assess safety concerns, and work with families to adopt language that is supportive.
Likewise, a professional intervention can also outline effective resources for families and explore professional care options for a loved one, structuring the next step in healing and encouraging successful admission to a dedicated treatment program.
What Evidence-Based Treatments Are There for Alcohol Use Disorder?
Some of the proven evidence-based treatment options for AUD include:
- Cognitive-behavioral therapy (CBT)
- Dialectical behavior therapy
- Motivational interviewing (MI)
- Acceptance and commitment therapy (ACT)
- Family therapy programs
Finding the right treatment is crucial for an individual to personally invest in their own sober future, with personalized programs backed by evidence-based care.
Depending on personal needs, this evidence-based care is often combined with other personalized options, from holistic healing opportunities to medication-assisted treatment (MAT) where necessary to navigate the complexities of alcohol use disorder.
How Does Family Support Impact Recovery?
Family can be a crucial resource for many overcoming addiction and the impact of AUD on daily life.
Dedicated family programs can impact a successful recovery journey through:
- Increased feelings of acceptance and healing at home
- Lowering relapse and helping develop relapse-prevention strategies
- Increased accountability, both in challenges and triumphs
- Creating a safe and emotionally supportive space at home
- Establishing clear boundaries for healing
- Developing communication, trust, and forgiveness
- Avoiding enabling behaviors
However, while family can be an amazing resource for many overcoming addiction, families are still tasked with putting in their own work to make the most of the opportunities, working with professionals to develop new skills, address personal needs, and invite change at home.
Learning about addiction, its effects, and committing not just an individual but the entire family to a dedicated healing program can help ensure that entire families can heal together.
FAQs
Is there a single “alcoholism gene”?
No. A person’s relationship with alcohol is based on several factors, including multiple genes and genetic expression.
Not only is there no single “alcoholism gene,” but genetics itself also only makes up part of the whole picture of a person’s relationship with developing alcohol problems and the risk of addiction.
Is alcoholism more hereditary or genetic?
While hereditary traits are passed between family members and offspring, genetics refers to an individual’s genetic makeup.
However, both are important, and one is not “more” impactful than the other.
Can environmental factors override genetic risk?
Absolutely. Environmental factors like personal relationships, communities, resources, and cultures can all have a profound impact on a person’s use of alcohol, attitudes toward the substances, and the development of AUD.
While a genetic predisposition can increase the risk of addiction, so too can unhealthy environmental factors. However, environmental factors can also increase a person’s resilience in the face of addiction by providing supportive resources, an educated population, access to cultures or ideas that accept emotional vulnerability and expression, and positive, supportive peers.
How much do genetics contribute to alcohol dependence?
It is commonly agreed that genetics contributes about 40 to 60% of the equation, with environmental factors making up the other side of these influences.
Can teens with a family history of substance abuse be more vulnerable?
Yes, teens and adolescents with a family history of substance abuse can be at an increased risk of developing addiction themselves.
That may be through a genetic predisposition or being raised in an environment where addictive substances are used, changing their perception and attitudes toward these substances, and potentially introducing teens to these substances during important developmental years.
Alcohol addiction is a complicated disease, and there is never a single factor that decides a person’s relationship with alcohol or the development of addiction. Genetics, alongside environmental factors, mental health needs, support, and education, all play a role in how alcohol affects each person’s life. Understanding these factors and how Reflection Family Interventions can help gives your family the tools necessary to support change.