Serotonin Test

(11 customer reviews)

£ 59,00

If you have been experiencing symptoms of unknown origins, such as trouble sleeping or mood swings, then this could be the cause of unhealthy levels of serotonin. Easily test your Serotonin levels at home by testing with GetTested’s Serotonin blood test. 

Serotonin is a central nervous system neurotransmitter that is responsible for many regulations inside the brain. Therefore it is crucial to maintain healthy levels of serotonin.

A serotonin deficiency may lead to mood disturbances, sleep disorders, and depression. On the opposite spectrum, an overabundance of serotonin can cause headaches, diarrhoea and heavy sweating. Find out if you may need medical treatment with our Serotonin Test. 

👉 Test done at home
👉 Analysed at an ISO 13485 certified lab
👉 Comprehensive report incl. recommendations

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What is Serotonin?

Serotonin is a neurotransmitter made from the essential amino acid tryptophan. It is important for several functions in the body, including the brain and gastrointestinal tract. This neurotransmitter regulates the mood and also promotes a smooth digestion. Additionally, it also affects the blood circulation by helping the platelets (platelets) coagulate in wound healing.

Healthy levels of serotonin greatly contribute to a high quality of life. Healthy serotonin levels are related to feelings of confidence, emotional stability and good memory and learning skill. 

Serotonin deficiency

Serotonin levels depend in part on the amino acid tryptophan, as it is a precursor to serotonin, but also on gut health, since 90% of our serotonin is produced in our intestines. Several vitamins and minerals are also important for the production of serotonin – too much alcohol, caffeine and sweeteners can inhibit the production in the body. Chronic stress and anxiety also prevent the brain from producing enough serotonin. Serotonin deficiency can affect physical and mental health and can sometimes be difficult to identify. When there is a great lack of serotonin, it can, for example, cause moodiness, stress and depression. Pay attention to some of the warning signs listed below if you suspect you may have low levels of this neurotransmitter:

  • Anxiety
  • Irritation
  • Depression
  • Fear
  • Difficulty sleeping
  • Digestive issues

And in more extreme cases:

  • Suicidal behaviour 
  • Panic disorders 

Cause of Serotonin deficiency

There can be two reasons as to why you may be suffering from a serotonin deficiency. Either your body is not producing enough serotonin or your body’s serotonin receptors are not working well enough or you don’t have enough of them. Genetic disorders can play a role in the amount of serotonin a person produces. What is also of influence is whether your diet includes many foods containing tryptophan, as tryptophan is the amino acid from which serotonin is made. Lack of exposure to sunlight can also cause a serotonin deficiency. 

Serotonin overabundance 

Serotonin is naturally produced by the body, but there are cases in which medications build up levels of serotonin in the body that are too high, which is unhealthy. This phenomenon is referred to as Serotonin Syndrome. 

The effects of high levels of serotonins on the mind and body depend on the amount of serotonin found in the body. Mild symptoms of high serotonin levels include:

  • shivering 
  • diarrhoea 
  • High blood pressure
  • Lots of sweating 
  • Headache
  • Confusion 
  • Twitching muscles 
  • insomnia and restlessness 
  • Dilated pupils 

In more severe cases, excessive amounts of serotonin can cause:

  • muscle rigidity
  • Fever
  • Seizures
  • Irregular heartbeat
  • Unconsciousness

In extreme cases, Serotonin Syndrome can even be deadly, if left untreated. 

Cause of Serotonin overabundance

Serotonin Syndrome is a drug reaction and often occurs when you increase the dose of a medicine that includes serotonin, or when you start a new drug that contains it. This serotonin is found in medicine that treat migraine and depression, as well as in some illicit drugs or dietary supplements. 

Serotonin and the gut

Most of our serotonin is produced in the gut; about 90%. Research is beginning to find more and more connections between imbalances in our gut flora and conditions such as depression. Due to this correlation, it is important to maintain good gastrointestinal health since it affects our mental health.

Before taking the Serotonin Test

If you take SSRIs (antidepressants), 5-HTP or tryptophan, it will affect your test result. 5-HTP and tryptophan can increase the body’s own serotonin production, which thus affects your levels on the test result. Because SSRIs (antidepressant drugs) cause the serotonin to stay longer in the blood instead of being absorbed into the cells, they will also affect your test results. If you want to know your level in combination with taking these supplements, you can continue to take them as usual, but if you want to know your natural production without the impact of these products, you should avoid taking them 5-7 days before collecting the test.

Additional information

Weight 0,049 kg


Before taking the test

  • The sample should be collected from your first morning urine. That means that only urine from the stream should be collected, not the first drops. 60 ml of urine must be collected in the cup. Remember to not drink more than 1 liter the night before.
  • Taking SSRIs (antidepressants), 5-HTP or tryptophan will affect your test results. Avoid intake 5-7 days before the test, unless you wish to measure how your levels are in combination with these drugs/supplements.
  • Your test ID must be registered before it is sent for analysis (otherwise the lab will not analyze the test).
  • We recommend that you take the test on an empty stomach in the morning.
  • We recommend that you submit the test for analysis on a Monday or Tuesday.
  • If tracking code is available, please attach it to the front of the envelope (found on your test ID card).
  • Before you start, you need to register your test. Your test kit contains a sticker with your unique test ID. Register your test ID at
  • Open the test tube and place it on a flat surface. Make sure the tube doesn’t fall.
  • Collect your morning urine in the cup. Collect from the streamflow and not from the first drops.
  • Use the pipette to extract urine from the cup, then push the urine out into the test tube. Make sure the entire tube is filled. Seal it carefully.
  • Place the sticker with your unique test-ID onto the tube. Place the test tube inside the transport tube and seal.
  • Place the tubes in the enclosed envelope. Send it the same day (preferably a Monday).


How does the Serotonin Test work?

The serotonin test is measured in urine. After you have placed your order, we will send you a complete test kit with everything you need to be able to collect the sample yourself at home. The urine is collected in the morning from your morning urine and then sent to our lab for analysis. You will receive your test result digitally after the lab has analysed your test.

Who should take the serotonin test?

Anyone suffering from the aforementioned symptoms associated with low levels of serotonin or high levels of serotonin can take this serotonin test to find out if their symptoms are caused by a serotonin deficiency or serotonin overabundance. The negative effects of a serotonin deficiency or overabundance can be severe, which is why it is important to check if you suspect anything. 

Where can I get a Serotonin test? 

You can get your own Serotonin test from us, delivered to you and ready to use at home. The Serotonin test analyses serotonin in urine and is easy to use. 

How long does it take to get the results?

As soon as the samples have arrived, they will immediately be tested at the lab, so you can expect the test results should be back to you within a week. 

When do I take the Serotonin test?

Because the sample should be collected from your first morning urine, you will have to take this test in the morning, after you get out of bed. We also recommend taking the test on an empty stomach.

If you are taking antidepressants, you should stop taking these 5-7 days before taking the test, because they will mess with the end results (unless you specifically desire to test your serotonin levels whilst on antidepressants).

Are low levels of Serotonin bad?

Yes, low levels of Serotonin can cause unwanted mental and physical problems, such as anxiety, depression and trouble sleeping and should therefore be taken very seriously. 

How do you treat low levels of Serotonin?

There are some ways in which you can naturally increase your serotonin levels. One of which is eating more food containing tryptophan. Many foods contain tryptophan such as:

  • Salmon
  • Eggs
  • Tomatoes 
  • Cheese
  • Turkey 
  • Tofu
  • Pineapples 
  • Grapefruit 
  • Kiwi 
  • Seeds, oats and (wal)nuts 
  • avocado 
  • Bananas 

Additionally, be sure to get more sunlight, and take regular exercise. Stress has a big influence on the serotonin levels, so find ways to release stress. 

You may also want to consider taking certain supplements.

Are high levels of Serotonin bad?

Yes, high levels of Serotonin can cause symptoms such as heavy sweating, trouble sleeping, headache and diarrhoea and in severe cases even seizures and unconsciousness. It should therefore be taken very seriously and treated quickly. 

How do you treat high levels of Serotonin?

The best way to treat Serotonin Syndrome is by taking away the drug that causes it. 

Mild symptoms of serotonin syndrome may go away within a few days of stopping medications. Sometimes, you can take medicine that blocks serotonin production (a medication called cyproheptadine can keep your body from making serotonin).

In a severe case, you may need to stay in the hospital so a doctor can give you adequate treatment. 


Refunds and returns

General Terms and Conditions

GetTested offers a wide range of health analyses to individuals and companies. We collaborate with a number of subcontractors of medical laboratory operations for analysis of the samples. To order our analyses, you must be at least 18 years old, people under the age of 18 need a parent’s permit. GetTested is not a substitute for traditional healthcare. In case of any problems, you should always contact healthcare. When you place your order, you accept our terms of purchase.

Test results

You will receive your test result digitally via the login you created when you registered your test. The response time varies for different analyses, information on how long the response time your analysis takes can be found on the product page. You as a customer are responsible for registering your unique test ID in order to receive your analysis answer. Your analysis answers are sent encrypted with ID verification for maximum security.

Shipping and delivery terms

Shipping will be added with £ 4. Our products are sent to the address you specified when ordering. You as a customer are responsible for providing correct address information when ordering. If you have not received your delivery within 10 working days, please contact us at and we will help you.

Prices and Payment

All prices are stated in GBP including VAT. Payment is made by card payment via the payment provider Stripe, which accepts VISA, Mastercard or AMEX.

Right of withdrawal

You as a customer have a 14-day right of withdrawal. The withdrawal period begins to apply on the day you received your goods. The right of withdrawal only applies to analyses that have not been sent to the laboratory for analysis and where the test kit, including the pre-stamped envelope, has not been used. Contact to exercise your right of withdrawal and further instructions. If you do not return everything in original condition, we reserve the right to deduct the amount of the refund to cover the fees for the material cost. We ask you to follow the instructions carefully. If, contrary to expectation, you need more material to perform your test, you can buy it yourself in our online store. This is because we have pushed prices to the maximum so that you as a customer will receive the best offer on the market. In the event of a right of withdrawal, we will refund you within 30 days from the day you received the item. Any shipping and return costs are borne by the customer and are not refunded. If you as a customer have used your test kit and regret your purchase after that, we will charge a cost of £15 for the test kit and £4 for shipping (a total of £21) which is deducted from the total amount we refund you, this to cover the cost of the sample material.


If the item you received is damaged or if you received the wrong item, please contact as soon as possible and we will help you. We ask you to follow the instructions carefully. Should you unexpectedly need more material to perform your test, please contact In the event of a dispute, we follow the General Complaints Board’s recommendations.

Customer Integrity

The personal information you provide in connection with your purchase is stored so that we can fulfil our agreement on services or products towards you. According to the Personal Data Act, you have the right to access the information we have registered about you. Contact us at if any information is incorrect and we will correct it or delete it. If you have chosen to receive our newsletters, we will also process your personal data in order to send you information about our business.


GetTested reserves the right to make any price changes and is not responsible for any errors that may be attributable to a laboratory used for sampling and analysis. GetTested reserves the right to make errors in the article information.

11 reviews for Serotonin Test

  1. Rachel :-)

    Diving deep into the world of neurotransmitters, I’ve been curious about the role serotonin plays in our mood and overall well-being. The Serotonin Test promised to shed light on this, and it did not disappoint. From the onset, the experience was commendable. The kit was delivered promptly, accompanied by detailed and easy-to-follow instructions, ensuring the sample collection was effortless. The anticipation of the results was a mixture of excitement and curiosity. When they finally arrived, I was presented with a thorough breakdown of my serotonin levels and its potential implications on my mental health. The insights were profound, helping me draw connections between certain feelings, mood swings, and this critical neurotransmitter.

    Armed with this knowledge, I approached my healthcare provider for guidance. We discussed potential lifestyle changes and interventions to optimize my serotonin levels, which I found immensely beneficial. This test isn’t just about getting a reading; it’s a gateway to better mental health. Anyone on a journey towards self-awareness and wellness would find the Serotonin Test a vital tool.

  2. Ava Roberts

    I took this test because I’ve been feeling more anxious than usual. My serotonin levels are lower than expected, which could be causing my anxiety. Glad I took the test. 🙂

  3. Emily Watson

    I decided to use this test due to my low mood and lack of energy. It was easy to use, results came back quickly. My serotonin levels are low.

  4. Charlotte Hughes

    I used this test because I’ve been struggling with sleep and mood. The test was easy to use and I received my results quickly. They showed that my serotonin levels are low, which might be the reason behind my symptoms.

  5. Lola

    My energy levels have been lower than normal, and I’ve been feeling down. I decided to take this test. The process was simple and results came back promptly. My serotonin levels are low. Now I have a better idea of what to do next.

  6. Thomas

    My intrigue with serotonin led me to take the Serotonin Test. Having heard about its crucial role in mood regulation, I was eager to understand my levels. The entire process, right from receiving the kit to sending the sample, was streamlined and hassle-free. The results were an eye-opener. Not only did they provide a clear indication of my serotonin levels, but they also came with an educational component, explaining the role and implications of varied serotonin levels. It was enlightening to realize how this single neurotransmitter could influence so many facets of one’s mood and behavior. Conversations with my therapist post the test were more meaningful. We were able to tailor discussions and strategies based on the findings, enhancing my mental well-being journey. For those looking to gain a deeper understanding of their mood patterns, the Serotonin Test is an invaluable resource. 🙂 🙂 🙂 🙂 🙂 🙂

  7. James Thomas

    Been dealing with restless sleep and mood swings, so I decided to try this test. It was easy to use and I got the results promptly. It showed my serotonin levels are low, which could explain my symptoms.

  8. Daniel

    Been feeling down lately. Used this test, discovered my serotonin levels are too low.

  9. Andrea

    The Serotonin Test was a journey of self-discovery for me. Receiving the kit, I was impressed with its professional packaging and comprehensive instructions. The sample collection process was straightforward and hassle-free. Delving into the results, I gained clarity on my serotonin levels and its potential impact on my daily life. Recognizing its influence on mood swings, sleep patterns, and general well-being was enlightening. This test serves as an essential tool for individuals keen on holistic health and understanding the intricate balance of brain chemicals.

  10. Mia Hartley

    Comprehensive analysis; a game-changer for understanding mood fluctuations.

  11. Liam Spencer

    I’ve always been fascinated by the role of neurotransmitters in our mental state, leading me to the Serotonin Test. The kit’s arrival was timely, with clear instructions that made the process simple. The real revelation, however, lay in the results. Understanding my serotonin levels provided a fresh perspective on my emotional and mental rhythms. The insights allowed for introspection, guiding me on potential lifestyle changes. The Serotonin Test is a beacon for anyone eager to take charge of their mental health, bridging the gap between knowledge and action.

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