Dopamine and serotonin are often described as the brain’s “feel-good chemicals”. In reality, both are complex chemical messengers involved in much more than simply making us feel happy.
From motivation and movement to sleep, appetite and mood, dopamine and serotonin play important roles throughout the body. While there is no magic food, supplement or “dopamine hack” that instantly fixes your levels, everyday habits can support the biological systems involved in healthy brain function. Here, we look at how to increase dopamine and serotonin naturally, what the science actually says and where popular wellness advice can become misleading.
Dopamine and serotonin are neurotransmitters: chemical messengers involved in communication within the nervous system.
Dopamine is strongly associated with motivation, reward, learning and movement. Rather than simply creating pleasure, dopamine helps the brain learn which behaviours are worth repeating and plays an important role in motivation and goal-directed behaviour.
Serotonin, also known as 5-hydroxytryptamine or 5-HT, has a wide range of functions involving mood, sleep, appetite, cognition and gastrointestinal function.
Interestingly, much of the body’s serotonin is produced outside the brain, particularly in the gastrointestinal system. However, serotonin circulating around the body does not readily cross the blood-brain barrier. This means that gut serotonin and brain serotonin should not be treated as the same thing.
You can read more about the biology of serotonin in this scientific review of serotonin’s functions throughout the body.
It is tempting to think of dopamine as a tank that can simply be “filled up”. Human biology is considerably more complicated.
Your brain carefully regulates dopamine production, release, receptors and signalling. More dopamine is not automatically better, and abnormally high or low dopaminergic activity can be associated with different medical conditions.
A better goal is therefore to support healthy dopamine function rather than constantly trying to create short-lived dopamine spikes.
The same principle applies to serotonin. There is no reliable lifestyle trick that allows you to directly control the amount of serotonin in your brain.
However, factors including physical activity, diet, sleep and light exposure interact with biological pathways involved in serotonin production and signalling.
These habits also have broader benefits for physical and mental wellbeing, making them considerably more useful than chasing individual “serotonin boosting” foods or supplements.
If you’re looking for one of the best-supported lifestyle interventions for brain and body health, regular physical activity is a good place to start.
Exercise affects numerous systems simultaneously, including dopamine, serotonin, endocannabinoids and brain-derived neurotrophic factor (BDNF).
A systematic review examining physical activity and dopamine found evidence supporting an effect of physical activity on dopaminergic function, although the relationship is complex rather than a simple “exercise equals more dopamine” equation.
Research has also explored how exercise affects serotonin. A recent systematic review and meta-analysis found that physical exercise can influence circulating serotonin, while highlighting differences between exercise types and the important distinction between peripheral serotonin and serotonin activity in the brain.
You don’t necessarily need an intense workout. Walking, cycling, swimming, resistance training or another form of movement you can perform consistently can all contribute to a healthier lifestyle.
Your brain needs raw materials from food to synthesise neurotransmitters.
For dopamine, one important nutrient is the amino acid tyrosine, which the body can use within the pathway that produces dopamine.
Protein-rich foods that contain tyrosine include:
Serotonin synthesis involves another essential amino acid called tryptophan. Because your body cannot make tryptophan itself, it has to come from your diet.
Sources include eggs, poultry, fish, dairy products, nuts, seeds, tofu, beans and whole grains.
However, eating a tryptophan-rich meal does not simply send serotonin directly into your brain. Tryptophan metabolism and transport across the blood-brain barrier are considerably more complicated.
Rather than focusing on a single “dopamine food” or “serotonin food”, aim for a varied diet containing sufficient protein, fruit, vegetables, whole grains and healthy fats.
Sleep and neurotransmitter systems are closely interconnected.
Your brain uses chemical signalling systems to help regulate the sleep-wake cycle, alertness and motivation. Poor or inconsistent sleep can also affect concentration, mood and energy, which can easily feel like a problem with motivation itself.
Simple sleep habits include:
If sleep is something you struggle with regularly, you can also read our guide to sleep and medical cannabis.
Natural daylight plays an important role in regulating your circadian rhythm β the internal biological clock that helps determine when you feel awake and when you feel sleepy.
Light exposure has also been studied in relation to serotonin signalling and mood.
You don’t need to “sunbathe for serotonin”. Something as straightforward as getting outdoors during daylight hours, particularly alongside physical activity such as walking, can combine several healthy habits at once.
Stress isn’t inherently bad. In short bursts, the body’s stress response helps us react to challenges.
Persistent stress, however, can affect sleep, appetite, concentration, motivation and mental wellbeing.
Strategies that may help include:
We’ve covered more practical strategies in our guide to managing stress.
Dopamine is heavily involved in reward-based learning and motivation.
That doesn’t mean you need to constantly chase intense stimulation. Smaller, meaningful rewards can be much more sustainable.
Finishing a task, learning a skill, listening to music, exercising, cooking, spending time with friends or progressing towards a goal can all engage the brain’s reward systems.
One useful approach is to break large goals into smaller achievable steps. Completing those steps provides regular feedback and can make it easier to maintain motivation without relying on constant high-stimulation rewards.
Search online and you’ll find supplements marketed as dopamine boosters, serotonin boosters, mood enhancers and nootropics.
Common examples include 5-HTP, L-tyrosine, L-theanine and herbal products.
The fact that a substance is available without prescription does not automatically mean it is effective or suitable for everyone. Supplements can also interact with medicines.
This is particularly important with products intended to affect serotonin. If you take antidepressants or other medicines that influence serotonin, speak to a healthcare professional before taking supplements designed to alter the same pathways.
This is where the topic becomes particularly relevant to CB1 Medical β but it is also an area where we need to avoid oversimplification.
Cannabis should not be thought of as a natural dopamine or serotonin supplement.
Cannabinoids such as THC and CBD primarily interact with the body’s endocannabinoid system, which itself interacts with numerous neurotransmitter systems.
THC can influence reward circuitry and dopamine signalling. CBD has also been studied for interactions with serotonin receptors, including the 5-HT1A receptor. These mechanisms are areas of ongoing research and should not be reduced to claims that cannabis simply “increases serotonin” or “boosts dopamine”.
Medical cannabis is prescribed for specific clinical circumstances rather than as a general wellness product or a way of optimising neurotransmitter levels.
If you’d like to understand the medical side in more detail, our guide to what medical cannabis is and how it works explains the role of THC, CBD and the endocannabinoid system.
There isn’t a reliable way to simply “fill up” dopamine levels on demand. Exercise, completing rewarding tasks, getting sufficient sleep and eating a balanced diet can all support the systems involved in healthy dopamine signalling.
Rather than looking for foods containing dopamine itself, focus on foods providing nutrients your body uses in neurotransmitter synthesis. Protein-rich foods such as eggs, fish, dairy products, beans, lentils, nuts and seeds can provide amino acids including tyrosine.
Tryptophan is an essential amino acid used in serotonin synthesis. Foods containing tryptophan include poultry, eggs, fish, dairy products, tofu, beans, nuts and seeds. However, eating these foods does not directly translate into an immediate increase in brain serotonin.
Exercise influences both dopaminergic and serotonergic systems, alongside many other biological processes. Research supports physical activity as beneficial for physical and mental wellbeing, although its effects are more complex than simply causing a fixed increase in individual neurotransmitter levels.
Light exposure is associated with circadian rhythm, mood and serotonergic signalling. Getting regular daylight exposure can form part of a healthy routine, although it shouldn’t be thought of as a direct treatment for “low serotonin”.
Dopamine plays an important role in motivation and reward, but feeling unmotivated does not necessarily mean you have a dopamine deficiency. Sleep, stress, mental health, physical health, medication and many other factors can affect motivation.
There isn’t a routine home test that can tell you whether your brain has “low dopamine” or “low serotonin”. Neurotransmitter activity in the brain is complex, and blood levels do not necessarily reflect what is happening within the central nervous system.
Cannabinoids can interact indirectly with dopamine and serotonin signalling, but medical cannabis should not be described as a dopamine or serotonin booster. Its effects depend on the cannabinoids involved, dose, formulation and individual patient, and treatment should be used for an appropriate medical indication under clinical supervision.
Dopamine and serotonin are essential chemical messengers, but wellness advice often makes them sound much simpler than they really are.
There is no single food, supplement or “hack” that guarantees higher dopamine or serotonin in the brain. Instead, regular exercise, good-quality sleep, a balanced diet, daylight exposure, stress management and meaningful activities can support the wider biological systems involved in mood, motivation and wellbeing.
And if persistent low mood, anxiety, fatigue, sleep problems or loss of motivation are affecting your everyday life, don’t assume you simply have “low dopamine” or “low serotonin”. These symptoms can have many causes and are worth discussing with a healthcare professional.
At CB1 Medical, we’re interested in the bigger picture of health β helping people better understand their bodies, their wellbeing and the evidence behind the treatments and lifestyle choices they encounter.
If you’re living with a diagnosed condition and conventional treatments haven’t provided sufficient relief, you can use our free eligibility checker to see whether medical cannabis could be an option worth discussing with a specialist.