Depression and neurodegenerative disorders affect millions of people worldwide. Approximately 21 million Americans experience major depression each year, while 7.2 million Americans are affected by Alzheimer’s and Parkinson’s diseases, the two most common neurodegenerative disorders. To avoid this path of suffering, it’s important to implement changes that can prevent or manage these conditions.
The good news is that boosting brain’s BDNF levels can help prevent and manage these conditions. In this article, you’ll learn about BDNF, its impact on brain disorders, how to increase BDNF levels, and ways to manage it through lifestyle changes.
What is BDNF?
Brain-Derived Neurotrophic Factor (BDNF) is a vital protein that nourishes your brain. It supports the survival of existing neurons and stimulates the growth of new ones.
Also, BDNF is essential for neuroplasticity, which is the brain’s ability to reorganize and form new neural connections, thereby enhancing learning and memory.
Maintaining healthy levels of BDNF can protect against neurodegenerative diseases, improve cognitive function, and positively influence mood and mental health.
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Why do BDNF levels fall and its impact on brain?
The levels of BDNF drops due to poor sleep, aging, chronic stress, and inflammation. When BDNF levels falls below a critical level, the neurons shrinks particularly areas affecting mood. People with depression have BDNF levels 30% lower than normal individuals.
A gradual decline in BDNF causes neurons in the brain or peripheral nervous system to lose function and ultimately die, leading to the onset of neurodegenerative diseases.
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How to increase BDNF in the brain?
Here are three effective ways to boost BDNF levels, which in turn stimulate the growth of new neurons, synapses, and enhance the brain’s memory centers:
1. Nutritional Ketosis
Achieving a state of nutritional ketosis, where the body burns fat for fuel instead of carbohydrates, can significantly increase BDNF levels. This can be achieved through dietary approaches such as the carnivore diet, which emphasizes the consumption of animal products.
A paper published in April 2025 showed that three weeks of ketogenic diet in cognitively healthy individuals enhanced the blood flow to brain by 22% and increases BDNF levels by 47%.
These foods not only help in reaching ketosis but also provide essential nutrients like DHA, EPA, choline, creatine, carnitine, and cholesterol, all of which are crucial for brain development and function.
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Intermittent fasting
During fasting periods, the depletion in carbohydrates shifts the brain to alternate energy sources i.e, oxidation of long-chain fatty acids. This process can boost the production of ketone bodies and create a metabolic state that promotes increased BDNF expression.
Optimal BDNF secretion in humans is expected to occur after 12 hours of fasting or strict caloric restriction. You can do this 3-4 times a week by eating your last meal by 6 or 7pm and having breakfast at 10 to 11 am the next morning.
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2. High-Intensity exercise
High intensity exercise such as running, cycling, elliptical, jump repeats, and swimming plays a significant role in elevating BDNF levels. This vigorous workout is performed in short bursts of intense work typically last between 15 seconds to 4 minutes, followed by periods of quick recovery, and repeating the cycle several times.
High intensity interval training (HIIT) boosts blood flow to the brain, stimulates the release of brain-derived neurotrophic factor (BDNF), and improves overall brain health.
High-intensity exercise can double your BDNF levels in just 30 minutes. Doing this for thirty minutes, three times a week, can maximize your BDNF levels. In contrast, antidepressants take three weeks to produce enough BDNF and form new connections.
Combining high-intensity exercise with intermittent fasting and omega-3 supplements can boost BDNF levels by up to 400% in some brain regions.
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3. Exposure to UVA Light
Exposure to sunlight, particularly when it enters through the retina, has been shown to increase the production of BDNF in the brain. Dr. Marc Molendijk and his colleagues at Leiden University in the Netherlands found a significant seasonal variation in blood level of BDNF, with increasing amounts of BDNF detected in the blood during summer months.
Sunlight exposure improves mood and aids in vitamin D production. Morning sunlight exposure also resets your body’s biological clock (circadian rhythm). This is why night-shift workers suffer more from depression and brain disorders than early risers and sleepers.
Exposure to 20-30 minutes of direct sunlight in the morning has a profound effect on the BDNF levels in the brain.
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Conclusion
Managing depression can be supported by increasing BDNF levels in the brain through lifestyle changes. Engaging in regular aerobic exercise, maintaining a diet that promotes nutritional ketosis, and getting daily sunlight exposure can all boost BDNF production.
These practices enhance cognitive function, improve mood, and support overall brain health. Incorporating these habits into your routine can be a natural way to help manage depression.
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