The popular saying“We are what we eat” holds a surprising truth! It conveys the notion that the food we consume has a direct influence on our physical and mental health. Essentially, our well-being is intricately tied to the quality and nature of the food we incorporate into our diet.

When we eat, our body breaks down the food into nutrients that are used for various functions, such as energy production, tissue repair, and growth. The quality of the food we eat determines the quality of the nutrients that our body receives. For example, if we eat a diet that is high in processed foods, our body will not receive the necessary nutrients it needs to function optimally. This can lead to a range of health problems, including obesity, heart disease, and diabetes.
On the other hand, if we eat a diet that is rich in high-quality foods– we will elaborate more on that– our body will receive the necessary nutrients it needs to function at its best. This can lead to improved physical health, increased energy levels, and a stronger immune system.

Not only does it affect our physical health, but the food we eat can also affect our mental health. Studies have shown that there is a strong link between diet and mental health. Eating a healthy diet can improve our mood, reduce symptoms of depression and anxiety, and even improve cognitive function!

By choosing to eat a diet that is rich in whole foods and nutrients, we can support our physical and mental health, and ultimately lead a happier and healthier life. Let’s dive right into it!

The Impact of Sugar & Processed Foods on Mental Health

While indulging in sweet treats and processed foods can be a tempting way to boost mood, the negative impact of these foods on mental health should not be overlooked. 

Studies suggest that diets high in sugar and processed foods are associated with an increased risk of depression and anxiety. A 2019 study published inJAMA Psychiatry found that consumption of sugary drinks was associated with a higher risk of depression, while a 2018 study published in the journalNutrients found that a diet high in ultra-processed foods was associated with a higher risk of depression and anxiety. 

When we consume sugary foods, our blood sugar levels spike, which triggers the release of insulin to bring blood sugar levels back down. This rapid fluctuation in blood sugar levels can cause mood swings, irritability, and fatigue.

In addition, consuming too much sugar can lead to chronic inflammation, which has been linked to depression and other mental health disorders. Inflammation occurs when the body's immune system responds to perceived threats, such as infections or injuries, and releases inflammatory molecules. While inflammation is a natural response to these threats, chronic inflammation can damage tissues and negatively impact brain function.

While it's okay to enjoy sweet treats in moderation, it's important to prioritize a balanced diet that is rich in whole, minimally processed foods to support optimal mental health. There are plenty of healthier alternatives that can support optimal brain function and mood. For a sweet treat, reach for fresh fruit, which is packed with fibre, vitamins, and antioxidants. Swap out refined grains for whole grains, such as brown rice, quinoa, and whole-wheat bread, which provide more nutrients and can help stabilize blood sugar levels. Snack on nuts, seeds, and hummus instead of chips or other processed snacks. You can also experiment with flavouring foods with herbs and spices instead of relying on high-sugar condiments. By making small changes to your diet and prioritizing whole, minimally processed foods, you can boost your mood, improve your cognitive function, and support optimal mental health and well-being.

Saturated Fatty Acids in Processed Oils: Possible Links to Mood Disorders

There is some evidence to suggest that a diet high in saturated fats, including those found in processed oils, may have negative effects on mental health. Saturated fats are typically solid at room temperature and are found in foods such as butter, cheese, and fatty meats. Processed oils that are high in saturated fats include palm oil, coconut oil, and some types of vegetable oils.

Studies have found that diets high in saturated fats can contribute to inflammation in the body, specifically neuroinflammation (brain inflammation), which has been linked to an increased risk of depression and other mental health conditions. The increase in inflammatory markers in the brain reduces the formation of new brain neurons as well as decrease brain signalling.

Additionally, diets high in saturated fats may be associated with a decrease in the production of serotonin, a neurotransmitter that is important for regulating mood and behaviour. What happens is the inflammatory markers produced, reduce the availability of tryptophan- the main component of serotonin. Low levels of tryptophan mean low levels of serotonin.

Instead, tryptophan is converted into a substance called kynurenine, where studies(Müller and Schwarz, 2007) found that high levels of kynurenine have been associated with certain diseases, including depression and neurodegenerative disorders.

The Benefits of a Well-balanced Diet

1. Provides essential nutrients: A balanced diet provides essential nutrients, such as vitamins, minerals, and amino acids, that are necessary for the proper functioning of the brain. For example, omega-3 fatty acids found in fish, nuts, and seeds have been shown to improve mood and reduce symptoms of depression.
2. Balances blood sugar levels: Eating a balanced diet with a mix of complex carbohydrates, healthy fats, and protein can help regulate blood sugar levels. This can prevent mood swings, irritability, and fatigue that can result from low blood sugar levels.
3. Improves gut health: The gut-brain connection is well-established, and a healthy gut microbiome can positively impact mental health. Eating a diet rich in fiber, fermented foods, and probiotics can support the growth of good bacteria in the gut and reduce inflammation.
4. Boosts energy levels: A balanced diet that includes complex carbohydrates, healthy fats, and protein can provide sustained energy throughout the day. This can help improve focus, concentration, and productivity.
5. Reduces inflammation: Chronic inflammation has been linked to several mental health disorders, including depression and anxiety. A diet rich in anti-inflammatory foods, such as fruits, vegetables, whole grains, and healthy fats, can help reduce inflammation and improve mental health.