Beyond its strength as an antioxidant, kiwi is also a fruit high in serotonin. A hormone that also functions as a neurotransmitter, serotonin is involved in a broad range of physiologic processes: it has digestive and cardiovascular functions, assists in learning and memory, and helps to regulate appetite and mood.
The following fruits had a high serotonin concentration (mean +/- SEM) expressed in micrograms/g weight: plantain 30.3 +/- 7.5; pineapple 17.0 +/- 5.1; banana 15.0 +/- 2.4; Kiwi fruit 5.8 +/- 0.9; plums 4.7 +/- 0.8; and tomatoes 3.2 +/- 0.6.
Abstract. Numerous studies have revealed that kiwifruit contains many medicinally useful compounds, among which antioxidants and serotonin may be beneficial in the treatment of the sleep disorders.
Kiwi fruits- as well as being tasty- also contain Trytophan which can boost your serotonin levels and tackle feelings of anxiety and stress. If you're not keen on kiwi fruits, plums also contain Trytophan and can help anxiety and depression in a similar way.
Kiwis have twice as much serotonin as tomatoes. Serotonin is a “happy” brain chemical that lifts mood, induces relaxation and boosts self esteem. People who are aggressive or hostile, or live in “fight” mode might be low in serotonin.
Kiwis are rich in folate, vitamin C, and E. According to research, oxidative stress plays an important role in anxiety. The combination of nutrients in a kiwi aid in the reduction of oxidative stress, which can result in chronic inflammation that science shows plays a part in many mental health conditions.
Serotonin is a chemical in the brain that can affect mood. Eating foods that contain the essential amino acid known as tryptophan can help the body to produce more serotonin. Foods, including salmon, eggs, spinach, and seeds are among those that help boost serotonin naturally.
Serotonin does not occur in the foods we eat, however it is synthesized from tryptophan, an amino acid. Tryptophan is mostly found in high protein foods, like meat, fish and poultry.
Nevertheless, eating 1–2 medium kiwis before bed may help you fall asleep faster and stay asleep longer. Kiwis are rich in serotonin and antioxidants, both of which may improve sleep quality when eaten before bed.
If you feel your mood lift eating kiwi, it's likely not your imagination. Kiwi, it turns out, is good for brain health—including mental health. “Kiwi is high in antioxidants like vitamin C, vitamin E, and carotenoids like beta carotene, lutein, and polyphenols [a type of antioxidant],” Todini says.
Avocado. If you are not a fan of walnuts, avocados are another excellent source of tryptophan, a key ingredient in serotonin synthesis. Avocados also have a myriad of other health benefits.
Another popular myth that is widespread on the Internet is that bananas improve mood because of their serotonin content. Although it is true that bananas contain serotonin, it does not cross the blood–brain barrier.
Certain fruits such as oranges, bell peppers, guava, kiwi, tomatoes, and strawberries, contain high amounts of vitamin C. Vitamin C helps prevent brain cells from becoming damaged and supports overall brain health. In fact, a study found that vitamin C can potentially prevent Alzheimer's.
Increasing serotonin levels can be done naturally. The best ways to do this are eating well, getting out in the sun or supplementing with vitamin D, exercising, taking adaptogens, and managing stress. Serotonin can also be increased synthetically with antidepressants.
It's also possible to increase serotonin levels without taking medicine. One natural way to increase serotonin is by working out. When you pedal your bicycle or lift weights, your body releases more tryptophan, the amino acid your brain uses to make serotonin.
Serotonin helps regulate the body's internal clock, including the ability to feel sleepy, remain asleep, enter rapid eye movement (REM) sleep, and wake in the morning. People with chronic insomnia, unusual sleep patterns, chronic fatigue, or consistently vivid dreams may have serotonin deficiency.
Certain drugs and substances such as caffeine, alcohol, nicotine, NutraSweet, antidepressants, and some cholesterol-lowering medications deplete serotonin and other neurotransmitter levels. Hormone changes cause low levels of serotonin and neurotransmitter imbalances.
Recent studies show that foods with the highest antidepressant benefits include oysters and mussels, other seafood, lean organ meats, leafy greens, lettuce, peppers, and cruciferous vegetables such as broccoli, cauliflower, cabbage, kale, and Brussels sprouts.
Blueberries
When we're anxious and stressed, our bodies crave vitamin C to help repair and protect our cells, and blueberries are packed full of it. Small but mighty, blueberries are bursting with antioxidants and vitamin C which have been shown to provide anxiety relief.
Foods naturally rich in magnesium may, therefore, help a person to feel calmer. Examples include leafy greens, such as spinach and Swiss chard. Other sources include legumes, nuts, seeds, and whole grains. Foods rich in zinc such as oysters, cashews, liver, beef, and egg yolks have been linked to lowered anxiety.
In fact, a study showed that eating two kiwis per day for 4 weeks increased vitamin C levels and also improved the function of immune cells called neutrophils in young men with low vitamin C levels ( 19 ). Neutrophils are white blood cells that help protect against pathogens and infection.