Lullabies
Journal·3 min read

The role of nutrition in sleep

How does nutrition affect you child's sleep patterns? Read on to find out, and how to incorporate sleepy foods into your little one's diet.

Lisa Adair
Lisa Adair
Published 27 April 2025
The role of nutrition in sleep

As sleep coaches, we understand the importance of a healthy diet, especially for sleep-deprived parents seeking a peaceful night's rest. But have you ever wondered how your child's diet impacts their sleep? A non-optimised diet can actually lead to many sleep issues, from not sleeping through the night, to frequent night wakings due to hunger, and believe it or not, 'false starts'!

In this blog, I'll look at the critical nutrients your little ones need for optimal sleep and brain development once they start on solid foods.

Please note- always consult a medical professional if you have concerns about your child's diet or potential nutritional deficiencies.

Iron: The Sleep Sustainer

Iron deficiency is a common concern for our little ones, particularly from 6 to 18 months of age as their milk intake decreases and they transition to solids. Iron plays a vital role in a child's motor and mental development, affecting behavior, cognitive growth, and sleep quality. Symptoms of iron deficiency include insomnia, fatigue, and disrupted sleep. Best sources of iron for children include green vegetables like broccoli, kale, and spinach, as well as beans, lentils, quinoa, chickpeas, fortified cereals or milks, and lean red meat. Consult with a doctor if a deficiency is suspected, as supplements might be necessary.

Vitamin D: The Sunshine Nutrient

Vitamin D deficiency can affect sleep, and this issue can be more prevalent during the winter months when there's less sunlight. In places like the UAE, excessive heat and cultural practices can limit sunlight exposure. Vitamin D deficiency may lead to symptoms like pain, fatigue, daytime sleepiness, a compromised immune system, and an increased risk of sleep apnea. Sources of vitamin D include cheese, fatty fish (salmon, tuna), egg yolks, mushrooms, and vitamin D-fortified plant-based milks. Vitamin D supplements are often recommended for children under 12 months.

Magnesium: The Sleep Regulator

Although research on the direct link between magnesium deficiency and children's sleep is limited, anecdotal evidence suggests that magnesium plays a role in regulating the circadian rhythm and sleep stages. Magnesium deficiency has been associated with issues like insomnia, muscle cramps, and restless leg syndrome. A balanced diet rich in magnesium sources, such as nuts, green leafy vegetables, dairy, whole grains, fish, chia seeds, and soya products, is a good practice for overall well-being.

Vitamin C: The Restorative Aid

Vitamin C is well-known for its positive impact on overall health, but it can also influence the quality of your child's sleep. Adequate vitamin C intake helps the body absorb other nutrients, including iron. You can find vitamin C in a variety of fruits and vegetables, with fresh and raw options being the best. However, your choice may depend on your child's age and where they are in the weaning process.

Calcium: The Bone Builder

Calcium isn't just crucial for promoting bone health and growth in children; it also plays a role in their ability to fall asleep. Deficiencies in calcium have been asociated with sleep difficulties. While dairy products are rich in calcium, you can also find it in dark green vegetables, fish, tofu, and some fruits. If your child has a cow's milk protein allergy or follows a dairy-free diet, it's advisable to consult with a doctor or dietitian to ensure they receive adequate calcium in their diet.

Protein: the Sleep Secret

The impact of protein on your child's sleep should not be underestimated. Protein-rich foods, such as lean meats, dairy, and plant-based sources like beans and nuts, can contribute to better sleep by providing a sustained release of energy throughout the night. These nutrients help maintain stable blood sugar levels, preventing those midnight hunger pangs that can disrupt a child's sleep. A lack of protein can lead to night wakings, or even false starts. as baby wakes hungry looking for food. As a sleep coach for parents, I often emphasise the importance of incorporating the right balance of protein into your child's diet as a key ingredient in achieving those peaceful and uninterrupted nights of sleep. A lot of protein sources (such as turkey/chicken) also contain tryptophan, which is a precursor to melatonin, which we know hugely impacts sleep from around 3-4 months.

A well-rounded and nutrient-rich diet is key to supporting your child's sleep and overall development. We all want our little ones to enjoy restful nights, and by paying attention to these essential nutrients, we can help them to have optimal sleep overnight.

Found this useful? Pass it on.
Lisa Adair, IBCLC
About the writer

Lisa Adair

Paediatric sleep consultant and Internationally Board Certified Lactation Consultant. Before founding Lullabies, Lisa spent 20+ yrs as a NICU and paediatric nurse with the NHS. She works with families in Dubai and worldwide, by video.

If this didn’t quite answer it, let’s talk.

A free 15-minute call to tell me what’s going on. I’ll listen, and tell you honestly whether I’m the right person for what’s happening right now.