Caffeine & Depression: What’s the Connection?

What Is the Link Between Caffeine & Depression?

About one-third of adults in the U.S. will experience depression at some point. While there are many evidence-based treatments for depression, researchers have begun examining the relationship between caffeine and mental health. One recent study examining 3,263 adults found a negative association between depression symptoms and up to 90 mg of caffeine daily, meaning that those who consumed up to 90 mg of caffeine were less likely to experience depression symptoms. Statistical differences were not found at higher amounts.³

Like all research, it is important to consider that many variables, including age, mental health status, and other treatment methods, may impact this relationship.

Can Caffeine Treat Depression?

Although caffeine may have mild antidepressant effects, it is not considered a treatment approach. Depression is a multifaceted mental health issue with varying symptoms that can ebb and flow over time. That said, if caffeine helps you feel better during the day, research shows it may be part of a healthy lifestyle.

Does Caffeine Have Benefits for Depression?

Many look forward to waking up with a warm cup of coffee each morning. This pleasure may speak to some of the inherent protective benefits for people with depression. Low and moderate doses of caffeine are associated with increased energy, concentration, and alertness, all of which can be important in counteracting or reducing depressive symptoms.

Possible benefits of caffeine on depression include:

• More energy: Many people with depression experience fatigue or sleep problems, and the energy provided by caffeine can help them feel more alert during the day.
• Stimulates dopamine: Caffeine stimulates dopamine production in the brain, the neurotransmitter associated with pleasure, motivation, and learning.
• Promotes gut health: Caffeine may improve the gut microbiome and mental health.⁴
• Accessible and safe: Unlike other drugs, caffeine is relatively inexpensive, easy to access, and legal. Although it can be dangerous in high quantities, most experts agree that low-to-moderate consumption is safe.
• Associated with social connectivity: Many people bond over coffee (at work, at home, or out with friends), and having this social attachment to caffeine may also help improve depression symptoms.
• May reduce the risk of suicide: A meta-analysis reviewing 80,173 participants found that drinking 1-4 cups of coffee each day decreased the risk of suicidal ideation in women (but not men). However, this protective effect diminished after four cups.⁵
• May reduce inflammation: Research shows that consuming coffee is correlated with a reduced risk of inflammation.⁶
• Can help with exercise: There are numerous studies examining the relationship between caffeine and physical activity. With that, research shows caffeine may increase exercise performance in endurance-related sports.⁷

What Are Caffeine’s Effects on the Brain?

Caffeine stimulates activity in the brain and nervous system. It enhances the circulation of essential chemicals, including adrenaline and cortisol. Caffeine also quickly releases feel-good hormones, including dopamine, serotonin, norepinephrine, and GABA, all of which can help with depressive symptoms. That said, caffeine is quickly absorbed in the body, with 99% of it being absorbed within just 45 minutes of ingestion.⁸

Possible Risks of Caffeine On Depression

All drugs, including caffeine, have potential side effects, and it’s important to be aware of the implications it can have on mental health. Coffee may exacerbate certain symptoms, such as headaches, insomnia or sleep problems, appetite issues, and irritability. These symptoms are more likely to occur when caffeine is consumed in excess, such as with a caffeine addiction.

Possible negative effects of caffeine on depression can include:

• Potential for increased anxiety: Caffeine use has been linked with specific disorders, including anxiety disorders. People with comorbid anxiety and depression may experience caffeine-induced anxiety.⁹
• Sleep problems: Caffeine promotes wakefulness, but drinking too much or drinking too close to bedtime may interrupt sleep cycles and issues falling asleep.
• Not considered safe for children or adolescents: Many young people drink soda, energy drinks, or coffee. However, caffeine may be associated with behavioral disturbances and other adverse symptoms.⁹
• Dependency: It’s easy to become dependent on caffeine. People may feel irritable, experience fatigue, or have headaches if they do not have access to it.
• Withdrawal: Caffeine withdrawal can be both emotionally and physically uncomfortable. Symptoms tend to start within 12-24 hours after ceasing caffeine, and they can persist for 2-9 days.

What to Be Aware of When Consuming Caffeine for Depression

Like with any substance, it’s important to be mindful of both the risks and benefits associated with consuming caffeine if you experience depression. Consuming a small-to-moderate amount may be beneficial, but taking more than the recommended amount each day may exacerbate mental health issues. Furthermore, if you experience other mental disorders, including anxiety, caffeine could aggravate unwanted symptoms.

Some Forms of Caffeine Are Better for Depression

Not all forms of caffeine may be equal. In addition, not all forms of caffeine have been thoroughly studied. For example, most studies have focused on the effects of black, unsweetened coffee. Some research has found that consuming sugar with coffee may actually increase cortisol, which can worsen depression. Therefore, energy drinks or sugary coffee drinks may counteract the desired mental health benefits.¹⁰

How It’s Metabolized Can Vary

Like all substances, coffee can be metabolized at different paces. The rate at which caffeine is metabolized largely depends on someone’s genetic chemistry, age, body weight, liver functioning, lifestyle factors, other medications, and the enzymes associated with caffeine breakdown. If you metabolize coffee quickly, the effects wear off faster, meaning the caffeine may not be as effective for your depression.

It Can Cause Sleeping Problems

Because caffeine is a stimulant, it’s important to be aware of its potential impact on sleep. The half-life of caffeine for the average adult is about five hours. For this reason, if you struggle with sleep problems, most experts recommend abstaining from any caffeine by the early afternoon. Keep in mind that you may unknowingly consume caffeine via certain medications or foods.

Coffee Brewing Methods Can Affect Cholesterol

Although research on this topic is somewhat limited, studies show that how coffee is brewed can affect your physical health, including your cholesterol levels. Specific coffee compounds could increase LDL cholesterol levels. Boiled coffee and unfiltered coffee may have more of an effect on your cholesterol. In general, it’s important to track your vitals via routine lab work.¹¹

Decaf Coffee Isn’t Caffeine Free

Despite the common misconception, decaf coffee isn’t inherently caffeine-free. Instead, it likely contains small amounts of caffeine, as it’s challenging for manufacturers to entirely strip caffeine from the coffee beans. This generally isn’t problematic, but if you are particularly sensitive to the effects of caffeine, you might want to reevaluate your consumption or consider alternative beverages.

Stopping Abruptly Can Worsen Depression Symptoms

Caffeine withdrawal can occur when someone who frequently uses caffeine ceases use suddenly. Symptoms of withdrawal may include headaches, fatigue, irritability, poor concentration, and a sense of fogginess. Moreover, caffeine withdrawal can also coincide with depression or magnify its effects. For this reason, it may be better to consider tapering from caffeine if you intend to cut back or quit.¹²

You Should Limit Caffeine If You’re Pregnant

The American College of Obstetricians and Gynecologists (ACOG) recommends that pregnant women consume less than 200 mg of caffeine per day. This equates to approximately one 12-oz cup of coffee. Research indicates that this amount does not appear to contribute to birth issues related to miscarriage or preterm birth. However, a final conclusion can’t be made in determining whether there is a relationship between high caffeine use and miscarriage.

Food & Drinks to Avoid With Depression

It’s unlikely that eating one certain food causes or even exacerbates depression. However, nutrition can have an influential role in emotional well-being. Some people find that particular foods or drinks coincide with lower energy, fatigue, or sluggishness. Conversely, eating a consistent diet of diverse foods may relieve some depression symptoms and improve overall mental health.

Food and drinks that people with a high risk of depression should avoid include:

• Alcohol: Alcohol is a depressant, and drinking while depressed can aggravate your symptoms.
• Excessive processed foods: Processed foods may lack essential nutrients. If that’s the case, they can cause energy spikes and crashes that deplete people from having energy throughout the day.
• Refined sugar: Sugar can also cause bursts of energy followed by quick crashes. People may crave sweets when depressed, and the dopamine release can make it challenging to prevent overeating.
• Artificial sweeteners: Some research shows a potential relationship between artificial sweeteners and depression.¹³ It may be best to consider avoiding or reducing these ingredients to see if it has a noticeable effect.

Lifestyle Changes That Can Help Depression

Positive lifestyle changes can certainly improve depression symptoms. Many people find that having a healthy support system, practicing self-care, engaging in meaningful hobbies, and managing their depressive triggers help strengthen their mental health. It’s also equally important to practice self-compassion and self-kindness during difficult moments. Try to treat yourself as you would treat a good friend when developing coping skills for depression.

In addition, focusing on your physical health can also improve your mood. For example, adhering to a consistent sleep schedule, taking medication as prescribed, eating certain nutritious foods, and exercising can help depression. If you feel overwhelmed with how to start, remember that beginning with small steps can make a big difference.

When to Seek Professional Support for Depression

Untreated depression can worsen progressively. Significant life events may also amplify depressive symptoms and make feeling optimistic about the present and future challenging. If you’re struggling, you’re not alone. Reaching out for help may be one of the best choices for mental health recovery.

Working with a therapist specializing in depression can help you feel better. You will work together to develop a treatment plan that best suits your individual goals. You can look through an online therapy platform or an online therapist directory to get started. In addition, if you’re interested in pursuing medication, there are numerous online psychiatrist options available to advise you on the best options.