A recent observational study published in Sleep Health suggests that increasing fruit and vegetable consumption could significantly enhance sleep quality. Conducted by researchers at Columbia University Irving Medical Center, the study found that eating around five cups of fruits and vegetables daily may lead to longer, more restful sleep with fewer nighttime awakenings. The research reinforces the idea that simple dietary changes, particularly incorporating more plant-based foods, can have meaningful effects on sleep health.

Eating more fruits and vegetables is linked to better sleep quality, according to a small study published in Sleep Health. Participants who consumed about five cups daily experienced fewer night-time awakenings and longer, uninterrupted sleep.

Complex carbohydrates, fiber, and magnesium found in produce aid sleep by promoting the absorption of tryptophan, which the body uses to produce melatonin. High red and processed meat intake, by contrast, was associated with poorer sleep.

Fruits and vegetables are rich in fiber and magnesium, both crucial for deep, restorative sleep. Despite USDA guidelines recommending 25–38 grams of fiber daily, most Americans consume far less — around 16 grams.

Experts recommend practical steps to increase intake, such as filling half your plate with fruits and vegetables at meals, choosing fiber-rich whole grains, and even using frozen produce as a budget-friendly option.

Eating more fruits and vegetables may improve sleep, study finds

The study involved 34 adults between the ages of 20 and 49, most of whom were men. Participants logged their daily food and beverage intake and wore activity monitors to track their sleep across 201 total days and nights. Researchers then analyzed the correlation between their dietary patterns and sleep quality, evaluating variables such as macronutrients (carbohydrates, protein, fat), micronutrients (vitamins and minerals) and food group consumption.

The results indicated that higher intakes of fruits, vegetables and complex carbohydrates were linked to fewer interruptions during sleep. In contrast, consumption of red and processed meats was associated with more frequent night wakings. According to coauthor Marie-Pierre St-Onge, PhD, complex carbohydrates are beneficial because they provide fiber and minerals like magnesium, which play essential roles in sleep regulation. In contrast, simple carbohydrates such as those found in sugary snacks and white bread do not offer the same benefits.

Medical experts unaffiliated with the study, like sleep neurologist Dr. Sudha Tallavajhula, support these findings, noting that complex carbohydrates may help the body absorb tryptophan, an amino acid essential for producing melatonin, the hormone that regulates sleep. Fruits and vegetables, being rich in both fiber and magnesium, are particularly well-suited for promoting healthy sleep.

Magnesium, found abundantly in green leafy vegetables, whole grains, nuts and seeds, plays a dual role in relaxation and melatonin production. It's well-known for its calming effect on the nervous system and is linked to improved sleep quality. The average American, however, typically consumes only 16 grams of fiber daily — well below the USDA's recommended 25 grams for women and 38 grams for men.