Let me tell you about a protein you’ve probably never heard of.
It’s called Brain-Derived Neurotrophic Factor (BDNF). Scientists sometimes describe it as the ‘fertiliser for the brain’.
Once you understand what it does, and how tinnitus may affect it, you can start to focus on what you can actually do. And as someone with tinnitus myself, I refuse to accept that nothing can be done.
First, the science (in plain English)
Your brain is made up of roughly 86 billion neurons, constantly passing signals across these tiny gaps. The strength of these connections shape how well your brain adapts and recovers. This is called neuroplasticity.
BDNF plays a key role in this process, supporting the growth and survival of neurons. When BDNF levels are higher, the brain is generally more capable of adapting and forming new pathways.
Think of it like soil. A garden with fertile soil supports growth. A garden with depleted soil struggles, not because growth is impossible, but because the conditions are less supportive.
BDNF is the soil.
Tinnitus is, at its core, a brain problem
When the auditory system receives reduced or altered input, for example after hearing loss, the brain adapts by increasing its internal volume control to compensate. This can create a phantom sound (tinnitus) that wasn’t there before.
This is neuroplasticity (i.e. the brain’s remarkable ability to rewire itself) working against you. The very mechanism that makes the brain so extraordinary has, in this instance, produced something unhelpful.
But if the brain rewired itself once, it can rewire again. Research into tinnitus treatment is increasingly focused on exactly this, using sound therapy, neuromodulation and cognitive approaches to guide the brain toward new, more helpful patterns.
Your brain is not stuck. It is capable of change.
What supports that adaptability?
Some studies have found lower BDNF levels in people with tinnitus compared to those without. One study found that higher tinnitus-related distress was associated with lower BDNF, because stress raises cortisol, which in turn affects BDNF. A vicious cycle where the condition itself drains the very resource the brain needs to recover. Another study found that people with both hearing loss and tinnitus had the lowest levels of all.
This is not a reason to feel hopeless. It is a reason to feel informed and purposeful.
The most powerful tool: Movement
Exercise is one of the most effective natural ways to raise BDNF.
When you exercise at moderate to higher intensity, your body produces lactate which signals processes in the brain that support BDNF production.
Moderate-intensity aerobic exercise, at 60-70% of maximum heart rate, for 30-40 minutes, 3-4 times a week, has been shown to help (Revelo Herrera et al., 2024).
A brisk walk counts. A swim counts. Whatever gets your heart rate up and keeps it there.
“But exercise makes my tinnitus more noticeable”
This sometimes happens temporarily due to an increase in blood flow and arousal, and it generally settles once the body returns to baseline. If your tinnitus is pulsatile or clearly triggered by exertion, adjust intensity and seek appropriate medical advice.
The other things that help
- Learning something genuinely new: Something that challenges the brain to form entirely new pathways raises BDNF. A language, an instrument, a craft you’ve never tried.
- Mindfulness and meditation have been shown to reduce amygdala reactivity and raise BDNF levels (Calderone et al., 2024). Even 10 minutes a day, consistently, can be significant for people with tinnitus, whose nervous system is frequently on high alert.
- Nutrition plays a role too. Omega-3 fatty acids, found in oily fish, chia seeds, and flaxseed, directly support BDNF (Ziaei et al., 2023). Polyphenols in blueberries, dark chocolate, green tea, and turmeric have also been shown to help (Fiore et al., 2025).
And then there’s sleep.
Sleep is not passive. While you’re unconscious, your brain is consolidating learning, clearing metabolic waste, and strengthening the connections formed during the day.
Neurologically speaking, sleep is when the fertiliser actually gets to work.
Poor sleep is associated with reduced neuroplasticity and tinnitus.
I’m not going to hand you a sleep hygiene checklist, as you probably already know this information.
What I want to say instead is this: difficulty sleeping is not a personal failing. It is an understandable response to a brain that is currently treating sound as a threat. Your nervous system is doing exactly what it’s designed to do… just at the wrong time.
What gradually shifts this, imperfectly and over time, is the same things that support BDNF more broadly. Consistent exercise. Mindfulness practice. Reducing the nervous system’s baseline threat level. And perhaps most importantly: moving toward acceptance of the sound rather than resistance to it, because resistance is alerting, and alerting is the enemy of sleep.
The bigger picture
Tinnitus, stress, and poor sleep tend to unhelpfully arrive together. And all three can affect how well the brain adapts.
But with every walk, every new skill, every moment of genuine rest, every 10 minutes of mindful breathing, you are giving your brain what it needs to build new pathways.
This is not about positive thinking. It is about biology.
The brain’s fertiliser, BDNF, is real. Research shows that it is measurably lower in people with tinnitus. And you have more influence over it than you may have been told.
That feels like something worth knowing.
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