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Serotonin (Happiness Hormone): What is it and in which foods is it found?

Serotonin (Happiness Hormone): What is it and in which foods is it found? Expert Dietician Esra Aktan Serotonin is a neurotransmitter, popularly known as the "happiness hormone", that plays a decisive role in both our mental and physical health. Many functions such as mood, sleep quality, appetite, digestive system and pain perception are balanced by serotonin. For this reason, sufficient serotonin levels are important both psychologically and […]

Serotonin mutluluk Hormonu

Serotonin (Happiness Hormone): What is it and in which foods is it found?

Expert Dietitian Esra Aktan

Serotonin is a neurotransmitter popularly known as the "happiness hormone" and plays a decisive role in both our mental and physical health. Many functions such as mood, sleep quality, appetite, digestive system and pain perception are balanced by serotonin. Therefore, having sufficient serotonin levels is important both psychologically and physiologically.

What is Serotonin?

Although serotonin has hormone-like effects in the body, it is technically a chemical transmitter. Approximately 90% of its production occurs in the intestines and the rest in the brain. The raw material of serotonin is the amino acid tryptophan, which can only be obtained from food. Therefore, serotonin synthesis is directly related to nutrition.

What Does Serotonin Do?

Serotonin affects many systems simultaneously:

  • Mood: Directly linked to depression and anxiety.

  • Sleep: Regulates the sleep cycle through melatonin synthesis.

  • Appetite: Affects both sweet tooth and satiety signals.

  • Digestive system: Takes part in the regulation of bowel movements.

  • Perception of pain: Pain threshold may decrease at low levels.

These effects indicate that serotonin plays a role not only in mood but also in holistic health.

In Which Foods Is Serotonin Found?

Serotonin is not found directly in foods. However, tryptophan and some vitamins and minerals necessary for serotonin production can be taken with food. Therefore, nutrition is one of the natural ways to increase serotonin levels.

Important nutrients that support serotonin synthesis:

  • Egg (especially yolk)

  • Turkey and chicken meat

  • Milk, kefir, yoghurt

  • Fish (salmon, sardine)

  • Pumpkin and sunflower seeds

  • Spinach

  • Avocado

  • Banana

  • Orange, kiwi, strawberry

  • Blueberries

  • Dark chocolate (≥70% cocoa)

  • Green tea

These foods can provide a natural increase by supporting the enzymes involved in the synthesis of both tryptophan and serotonin.

Symptoms of Serotonin Deficiency

Low serotonin can cause both emotional and physical symptoms:

  • Persistent unhappiness and depressed mood

  • Excessive sweet or carbohydrate cravings

  • Insomnia or difficulty falling asleep

  • Anxiety, tension, restlessness

  • Muscle aches

  • Digestive problems (especially associated with IBS)

How to Increase Serotonin Naturally?

Lifestyle factors that support serotonin levels:

  • Balanced diet with foods containing tryptophan

  • Regular exposure to sunlight

  • Regular exercise

  • Adequate and quality sleep

  • Stress management

  • Sufficiency in terms of omega-3, B6 and vitamin D

Nutrition-based support is both a natural and sustainable method of maintaining serotonin balance.

Expert Dietician Esra Aktan

January 07, 2026


This content is for general informational purposes only. It does not constitute diagnosis, treatment, or advertising. Each application is specific to the individual and should be evaluated by your physician. It is not a substitute for medical advice; always seek professional medical opinion regarding your health condition.

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