ZOE Science & Nutrition - Most replayed moment: The hidden dangers of hearing loss | Prof. Marcelo Rivolta

Episode Date: September 29, 2026

The world around us is louder than ever. From booming speakers to roaring traffic, our ears can take quite a beating. But have you ever stopped to consider the long-term impact of all this noise? Because hearing loss isn’t just about your ears. Emerging research suggests it could also affect your brain health in surprising ways. I’m joined by Professor Marcelo Rivolta to explore how noise exposure can cause lasting damage. He shares the early warning signs to look out for, what to do if your hearing begins to decline, and simple steps you can take to protect these vital organs on the side of your head. 🌱 Try our science-backed and tasty wholefood supplement Daily30 🌿Let your gut microbes snack on the ZOE Gut Health Bar Get our brand-new app and Gut Health Test designed by world-leading gut health and nutrition scientists to build healthy eating habits 👉 Join ZOE Follow ZOE on Instagram. 📚Books by our ZOE Scientists The Food For Life Cookbook Every Body Should Know This by Dr Federica Amati The Appetite Reset by Dr Federica Amati Food For Life by Prof. Tim Spector Ferment by Prof. Tim Spector Good Mood Food (preorder) by Prof. Tim Spector Free resources from ZOE The Smart Snacking Guide: How to feed your gut, fuel your day, and snack without guilt The Hormone Harmony Guide: Tuning Your Body’s Internal Orchestra   Eating for Better Brain Health: Your brain-gut blueprint How to eat in 2026 - Discover ZOE’s 8 nutrition principles for long-term health Live Healthier: Top 10 Tips From ZOE Science & Nutrition Gut Guide - For a Healthier Microbiome in Weeks  Better Breakfast Guide Have feedback or a topic you'd like us to cover? Let us know here. Episode transcripts are available here.

Hello and welcome to Zoe Recap, where each week we find the best bits from one of our podcast episodes to help you improve your health. The world around us is louder than ever. From booming speakers to roaring traffic, our ears can take quite a beating. But if you ever stop to consider the long-term impact of all this noise, because hearing loss isn't just about your ears. Emerging research suggests it could also affect your brain health in surprising ways. I'm joined by Dr. Marcello Revolta to explore how noise exposure can cause lasting damage.

He shares the early warning signs to look out for, what to do if your hearing begins to decline and simple steps that you can take to protect these vital organs on the side of your head. What's it like to suffer hearing loss and how does it impact your life? It can have a very, very substantial impact. One of the things, and I think probably a lot of people in the audience

may relate to this, You start having to put the volume up in certain devices because you cannot get the same kind of information as that kind of healing that you had me before. But that in a way is more of a symptom. The thing when it starts impacting your life is when it starts affecting your communication with other people. There is a very telling sentence that Helen Keller, who was a teacher, suffered from blindness and healing loss in the first part of the 20th century. And because she was blind and deaf, she was asked for which one. was impacting her life more, the loss of sight or the loss of hearing. And she very poignantly said, and I'm paraphrasing here, but it was without the doubt,

hearing because blindness sort of cuts you off from things around you, but hearing casts you from people because affects communication. You go to a pub to have a conversation with some friends, and all of the sudden you are in that very loud environment, and you cannot understand what they are saying. and you start asking for them to repeat things. And after a while, you just feel embarrassed. You don't want to ask the same thing over and over again. And then you start feeling more withdrawn, more ostracized,

and then you stop going to the pub because I can't hear what they're saying. I can't have a conversation. And that is impacting your ability to communicate, your ability to interact, but force you to kind of almost withdraw from your social life. And that has a huge impact on your daily life and on your future sort of welfare as well, your social interaction. How does that then affect your health?

One of the things that healing loss has been shown in the last few years, and there is an increasing volume of research, identifying a link between, for example, healing loss and dementia. Roughly, it is said, for those people that develop severe healing loss in sort of midlife, they have a five-fold enhanced risk of developing dementia later on. They have a five-fold higher risk of getting dementia if you get hearing loss. If you get severe a hearing loss, if you have moderate a hearing loss, it's about to fall the risk later in life. Why is that it still not clear?

There are different theories trying to explain this. One is cognitive overload. You need to make more effort to listen and to understand. So your brain use a lot of more brain power to call it in a simple way. and that sort of produce kind of a more intense sort of word there. There are other theories that perhaps the conditions that lead to develop healing loss are underpinning and underlying the condition that will develop dementia as well. Whatever the explanation and the justification of the link is,

it's clear that the link seems to be there. And we can minimize that risk by intervening early with your healing loss. We just start feeling that you are losing your sense of hearing. I find it rather extraordinary that hearing loss should have such a big impact because we've done podcasts talking about dementia and people are often talking about this thing is like a 30% increase or a 40% increase in risk. So it's like fivefold is enormous. It is one of the higher links, but also one of the things that can be modified because other things like, for example, genetics are more difficult to impact. But healing loss is one of those that is something can be done in order to prevent

the higher risk later in life. If I was having hearing loss, but then I had some sort of device that meant that I can hear better, does that reduce the risk of dementia? Yes. Even with the devices which are currently available, for example, the use of hearing aids, they reduce the risk because this theory of the cognitive overload,

if you need to make a lot more effort to understand what people are saying, and use a lot more your brain space to follow a conversation, you reduce that, you take it back to more normal levels, but using something as available as a hidden aid. So one theory is somehow my brain is doing so much work to try and understand a conversation that somehow its normal processes are being disrupted.

Yeah, it's an overload that then tends to more wear and tear that then impacts. That's one of the theories. But it seems to be one of the more prevalent theories at the moment. And so therefore, if I can use some sort of device, that makes it easier to understand, then my brain can continue to function in a healthier way. Well, it's definitely a very big argument, I guess, for looking after our hearing and thinking about it.

It makes me feel like I should probably take my hearing more seriously than I have done. It's a shame I'm already 50. I probably should have had this conversation with myself when I was 16. How worried should I be about, for example, going to a really loud concert for two hours? The more precautions you can have, the better. If you're going to go to a very loud concert, you can use some ear defenses, some ear plugs that will sort of attenuate the intensity of the sound.

If you're listening to music in your headphones, turn the volume down a little bit. Very loud blasts can have permanent damage. And what about when I'm walking past the person digging up the road with the pneumatic drill? because I was just thinking about that. I had that experience only last week and was thinking, wow, that is really loud. Yeah, sometimes just protecting your ears with your fingers. Sometimes it's a very loud bang.

You're completely caught by surprise and unprepared. But it's something that you can see it coming or hear it coming. Then you can at least trying to minimize it. So I'd love to sort of conclude with your advice to anyone who's thinking today, how can I reduce my risk of either developing hearing loss or having my hearing loss get worse? What would your practical advice be? Yes, absolutely.

I think that's a very good point to conclude here. I would say that you have to protect your hearing. Remember that those cells are your lifetime companion. So you have to look after them. You have to protect them, trying to be not exposed to very loud noises. Use the headphones in a very sensible way. But also, and this is also very important, And when you start having symptoms of losing your hearing, do something about it.

Go and see your GP, go and see your audiologist, and they will advise if you need hearing aids. And if you need hidden aids, use them. We talked about how important is the use of hearing aids to prevent the onset of dementia or sort of minima reduce the risk of dementia. And we have to overcome because that's something that I also like to mention, this kind of a stigma. We all have a certain time in our life. We use glasses and nobody blink an eye if you have glasses.

It's completely natural. However, it's not the same with hyphenin AIDS, and we need to overcome that presumption that, oh, healing aids make you look different and make you look old. That's not true. It shouldn't be the case. Hiren aids are there to help, and if you need them, you should wear them.