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Wednesday, April 8, 2026

The ‘phantom’ sounds designed to train your brain

In a Nutshell

Binaural beats and isochronic tones — audio tracks designed to shift your brainwave patterns — are all over Spotify and YouTube. They promise better sleep, sharper thinking, and less anxiety, but the research is messy. Most studies are small, sometimes their results conflict, and the effects on older adults have barely been investigated.

Let’s find the signal in the noise.

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10 evidence-based benefits of green tea

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Walking may work best combined with strength training

Listen up,
Tim Snaith
Newsletter Editor, Healthline

Written by Tim Snaith
April 8, 2026 • 3 min read

what’s got us buzzing

When your brain fills in the gap

I keep seeing YouTube recommendations with titles like “Locked-in Deep Work,” “Boost Serotonin Happy Mindfulness 10 Hz Isochronic,” and “Relief for a Distracted Mind Study Music.” They’re very popular with hundreds of thousands of views. But do they work?

The proposed mechanism is interesting. When you hear a 132 Hertz (Hz) tone in one ear and a 121 Hz tone in the other (aka binaural beats), your brain perceives a third tone at 11 Hz — a slow pulse that doesn’t exist outside your head. The theory is that this phantom frequency nudges your brainwaves toward states that encourage deep sleep, relaxation, or calm focus.

A related technique called isochronic tones pulses a single tone on and off at a set rhythm, and no headphones are required. I’ve been listening to a 10 Hz alpha isochronic track while working, and it does seem to help. Both techniques aim at the same effect: brainwave entrainment.

However, the most recent research shows the evidence is mixed.

A 2023 review found just 14 qualifying studies. Five supported the idea that binaural beats shift brainwave patterns. Eight contradicted it. Wildly inconsistent study designs made a meaningful comparison nearly impossible. The largest trial to date, with 1,000 participants, found that listening to binaural beats at home actually worsened cognitive test scores.

A 2025 study used EEG (electroencephalogram) monitoring to confirm that binaural beats do indeed entrain brain activity at targeted frequencies, validating the mechanism even if the benefits remain unclear. For example, a 2025 pilot found alpha-frequency beats reduced stress scores, but didn’t improve anxiety or working memory.

There is less data available for older age groups, but what does exist is interesting. A 2025 review identified 12 studies on binaural beats in older adults. One of the few randomized controlled trials (RCTs), published in 2024, tested binaural beat music on older adults (average age 81 to 82) with poor sleep in a Taiwanese care facility. After 14 days of daily listening, the treatment group showed improved sleep quality, lower depression scores, and calmer nervous system activity. Sounds promising, but this was only a single small trial.

A neurologist quoted in an older Healthline report said binaural beats are probably no more effective than calming music. He also said that listening to them is harmless.

If you want to try binaural beats yourself, wear headphones and listen for 15 to 30 minutes in a quiet room. Choose a delta or theta mix for sleep, alpha for relaxation. And let us know if it worked for you.

For isochronic tones, speakers work fine. Here’s the 3-hour mix I’ve been listening to. None of this should replace anything your doctor recommends — consider it a fun experiment.

HOW MUSIC AFFECTS YOUR MOOD

💪 Over to you: Have you heard of binaural beats and, if you have, did they have any noticeable effect when you listened? Email wellnesswire@healthline.com and let us know.

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Until next time,

Take care of yourself, and we’ll see
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🦴 Ultraprocessed foods do what?

Today’s Ingredients

The case against ultra-processed foods (UPFs) is pretty well established — heart disease, obesity, type 2 diabetes, and even some cancers. But new research suggests there’s another risk to add to the list: weaker bones. A large study links higher UPF consumption to lower bone mineral density and a greater risk of hip fractures, and not just in older adults.

Below, we break down what the research found, why it matters even if you’re under 65, and what dietitians say you can do about it, without changing your entire diet.

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Let’s look into it,
Tim Snaith
Newsletter Editor, Healthline

Written by Tim Snaith
April 7, 2026 • 3 min read

FRESH FINDINGS

New research says yes, and the numbers are hard to ignore.

A study published in The British Journal of Nutrition followed over 160,000 adults for 12 years and found that higher intake of ultra-processed foods (UPF) was associated with lower bone mineral density at the hip and spine. For every 3.7 extra daily servings — roughly a frozen dinner, a soda, and a cookie — the risk of hip fracture rose by 10.5%.

What counts as ultra-processed? These are foods manufactured on an industrial scale that are typically high in sweeteners, salt, and unhealthy fats, and low in fiber and minerals. Think store-bought ready meals, breakfast cereals, sweetened drinks, and packaged snacks. They make up roughly 55% of total calories consumed by U.S. adults.

And this isn’t just a concern among older adults. The link to bone health was strongest in people under 65, possibly because younger digestive systems absorb more of the less-healthy stuff in UPFs. People who are underweight are also at greater risk.

Why it happens: UPFs tend to crowd out the nutrients bones need most, such as calcium, vitamin D, magnesium, and protein, while increasing inflammation, which can weaken bones over time.

Dietitian Theresa Gentile advises focusing on what you can add to your diet rather than what you can take away.

Toss an egg and veggies into instant ramen.
Stir fruit, nuts, and chia seed into instant oatmeal.
Add a side salad to frozen pizza.

Small upgrades like these boost the nutritional value of convenience meals without having to ditch them entirely. Add regular resistance exercise, and your bones will thank you.

Want to learn more about food, diets, cooking, or some other nutrition subject? Let us know at nutritionedition@healthline.com, and we’ll look into it for you! (Heads-up: We may use your response in an upcoming newsletter.)

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Until next time,

Take care of yourself, and we’ll see
you again soon!

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Earl Grey tea and a hot cross bun.️

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