Serotonin-rich foods don’t boost serotonin, but a special serotonin diet and some specific foods can elevate mood and help treat disorders like depression.
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Serotonin is a major neurotransmitter dubbed the “happy molecule” for the role it plays in maintaining a positive mood.
Most brain cells are affected directly or indirectly by serotonin, as it also helps regulate appetite, social behavior, libido, sleep, memory, and learning.
A low level of serotonin is linked to depression, but taking active measures to increase brain serotonin can be a challenge.
Serotonin-boosting drugs used as antidepressants can have serious side effects and don’t work for almost half of those who try them. (1)
Some foods do contain serotonin but, paradoxically, eating them has no effect on serotonin levels.
Fortunately, there are a few simple workarounds that can make food an effective way to increase serotonin.
List of Serotonin-Rich Foods
Only a handful of foods naturally contain serotonin including: (2)
- Chinese cabbage
- green beans
- green onion
- hickory nuts
- hot peppers
But before you run to the store to stock up on these foods, note that the serotonin in food does not cross the blood-brain barrier, your brain’s security system for keeping out foreign substances.
So the serotonin found in food does not get into your brain and there’s no evidence that these foods will do anything to boost your mood. (3)
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Foods That Contain Tryptophan, Serotonin’s Precursor
Most “serotonin foods” lists are actually lists of foods that contain tryptophan, an amino acid that’s a precursor of serotonin.
You need some tryptophan in your diet to create serotonin, and when your dietary intake of tryptophan is low, serotonin levels drop. (4)
Most foods that are good sources of protein are also good sources of tryptophan.
Top tryptophan-containing foods include: (5)
- meat of all kinds
- poultry of all kinds
- seafood of all kinds
But eating foods high in tryptophan does not guarantee it will get into your brain or turn into serotonin any more than eating serotonin-rich foods does!
The Serotonin Food Dilemma
If you want to increase serotonin, you need to eat protein for its tryptophan — a critical building block for synthesizing brain serotonin.
Yet paradoxically, protein blocks serotonin formation.
Levels of both tryptophan and serotonin drop after eating a meal that contains protein! (6)
Even a small amount of protein eaten with carbohydrates inhibits serotonin formation. (7)
Additionally, tryptophan does a poor job of competing with other amino acids for uptake into the brain.
The Serotonin Food Solution
So, if consuming foods that contain either serotonin or tryptophan does not increase serotonin, what can you do?
Judith Wurtman, PhD, is a former director of the Program in Women’s Health at the Massachusetts Institute of Technology Clinical Research Center.
Her husband, Richard Wurtman, MD, is the director of the Clinical Research Center at MIT.
Together, they discovered that it’s not a coincidence that people binge on carbohydrates when they want to lift their mood.
They also discovered a way to eat strategically to get tryptophan into your brain to boost serotonin levels.
It’s not just what you eat, but how you eat it.
Until this discovery, the relationship between tryptophan, serotonin, and food had been a puzzle.
But the solution turned out to be surprisingly simple.
How to Increase Serotonin With Strategic Eating
The Wurtmans found that occasionally eating carbohydrates on their own — with no protein — avoided the problem of protein blocking serotonin synthesis.
So the answer to the dilemma of increasing serotonin with food is to eat more carbohydrates on their own.
This approach is detailed in Dr. Judith Wurtman’s book The Serotonin Power Diet.
This is a bit of a shock when you consider how often we’ve been told that carbohydrates are bad for us and make us fat and unhealthy.
Commercial diet plans like Atkins and South Beach and diet movements like paleo and keto diets have drummed into our heads that carbohydrates should be eaten in extreme moderation.
They’ve promised that low-carb is the way to go to be lean and healthy and avoid diseases like diabetes, obesity, and Alzheimer’s.
Diets like “The Zone” contend that when you do eat carbs, they should always be eaten with both fat and protein.
Is it possible that all this low-carb eating has contributed to depression and other mood disorders in those susceptible to low serotonin?
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A Typical Day on a Serotonin Diet
Another serotonin diet book based on strategic carbohydrate eating is Carol Hart’s Secrets of Serotonin.
A Typical Day on Carol Hart’s Strategic Carbohydrate Eating Plan
BREAKFAST: toast with fruit spread, hot cereal with raisins, or fruit salad
LUNCH: large green salad, vegetable soup, vegetarian stir-fry or grilled vegetables
SNACKS: fresh or dried fruit, pita bread or raw vegetables with hummus, tortilla chips with salsa, or popcorn
DINNER: protein source of choice, vegetables, and rice, pasta, potatoes, or sweet potatoes
While both Wurtman and Hart’s serotonin diet plans give you the green light to eat foods like bagels, crackers, and biscotti, they do not give you free rein to indulge in all the carbs you want.
Simple carbohydrates like sugar and white flour boost serotonin and mood the fastest, but the effect lasts only an hour or two and there is nothing healthy about these foods. (10)
So we recommend that if you follow serotonin diet principles, put a strong emphasis on brain-healthy carbohydrates like vegetables, fruit, legumes, and non-wheat grains like rice and oatmeal instead of relying on bread and crackers.
If you are daunted by making this change to your diet, rest assured that it may not be necessary to restrict protein to this extent forever.
Some people find that eating one carb-only meal or snack every day is enough to keep their serotonin levels and mood where they want it to be.
Note: If you have diabetes or other insulin-related disorder, talk to your doctor before making any major changes to your diet.
Eating Carbs — Without the Guilt
If you’ve been following a low-carb diet, I can almost feel your guilt about selectively eating carbohydrates.
You may be worried that adding so many carbs back into your diet will make you gain weight or set off carb cravings.
In fact, you may find the opposite to be true.
I suggest you read the Amazon comments for Wurtman’s book The Serotonin Power Diet.
Commenters claim that strategically eating carbs not only improves their mood, but often helps them lose weight and reduce cravings.
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Four Foods That Increase Serotonin Naturally
There are a handful of foods that do not contain serotonin, but work by a variety of mechanisms to increase serotonin naturally.
The spice turmeric contains the active ingredient curcumin which readily crosses the blood-brain barrier and increases levels of both serotonin and dopamine. (11)
Surprisingly, 95% of serotonin resides in the gut, not the brain! (14)
A healthy alternative to chocolate candy bars is cacao nibs which contain all the mood-boosting compounds found in chocolate, minus the sugar.
They are significantly less processed as well.
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Cold-Water Fatty Fish
People with low serotonin levels commonly have low levels of DHA, an omega-3 fatty acid that is an essential structural building block of the brain.
Eating cold-water fatty fish like salmon that’s high in omega-3 fatty acids can help raise serotonin levels. (15)
Fermented foods like yogurt, kefir, and unpasteurized sauerkraut naturally contain psychobiotics, probiotics that help establish a normal balance between good and bad bacteria in your intestines.
An overabundance of bad bacteria creates toxic byproducts called lipopolysaccharides which have numerous negative effects on your brain, including lowering serotonin levels and causing depression. (16)
Beverages That Affect Serotonin Levels
Tea is the most widely consumed beverage in the world and its health benefits are legendary. (19)
Approximately 1,400 chemical compounds have been identified in tea so far, including l-theanine. (20)
L-theanine is found almost exclusively in true teas — white, green, oolong, and black teas — which come from the leaves of the same evergreen bush, Camilla sinensis.
L-theanine is an amino acid that has a relaxing, but not sedating, effect.
It naturally increases levels of serotonin. (21)
Your favorite beverages could also be sabotaging your efforts by decreasing your serotonin levels.
Most people drink alcohol to feel happy and relaxed, but it decreases serotonin. (22)
The artificial sweetener aspartame found in diet drinks reduces serotonin levels by inhibiting the brain’s uptake and conversion of tryptophan. (23)
Serotonin Foods: Take the Next Step
The neurotransmitter serotonin is essential for a happy mood.
While there are a handful of foods that contain serotonin, they do not raise serotonin levels in the brain.
Tryptophan is the amino acid precursor of serotonin.
But eating foods that contain tryptophan do not raise serotonin levels in the brain either.
The key is the strategic consumption of carbohydrate-rich foods.
To increase serotonin levels with your diet, try this approach:
- Strategically eat carbohydrates alone without any protein source some of the time.
- Incorporate serotonin-boosting foods like turmeric, cold-water fatty fish, and fermented foods into your diet.
- Drink tea, which increases serotonin, and minimize diet drinks and alcohol which decrease serotonin.
If you suspect that low serotonin is affecting your quality of life, give the serotonin diet a try to see if it gives you the mood lift you’re looking for.