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Evidence-based

The Missing Piece in Brain Health Tracking: Why We're Partnering with Sens.ai

A neurofeedback study for APOE4 carriers (and anyone serious about cognitive longevity)

T
· Reviewed by Dr. Kevin Tran, PharmD

Key takeaways · TL;DR

Phoenix Community is partnering with Sens.ai to give APOE4 carriers objective cognitive tracking through a $1,250 home neurofeedback headset that combines EEG, photobiomodulation, HRV biofeedback, and ERP assessments like P300 latency and peak alpha frequency. The goal is to replace guessing with measurable data on whether brain interventions actually work.

Definition

An event-related potential measuring how quickly the brain processes new information and makes decisions.

P300 latency is measured in milliseconds and slows with aging and cognitive decline. Faster P300 latency is associated with better processing speed and is a useful objective biomarker for tracking brain interventions.

Definition

A brainwave biomarker linked to cognitive performance that typically declines with age.

Higher peak alpha frequency correlates with better processing speed and general cognitive performance. It is one of the biomarkers Sens.ai tracks to measure whether brain training protocols are working.

Sens.ai Modalities

ModalityPurposeHow it works
NeurofeedbackTrain target brain statesEEG sensors read brainwaves, feedback via sound and visuals
PhotobiomodulationPrime the brain before training810nm near-infrared light through the skull
HRV biofeedbackCalm nervous system before trainingEar pulse oximeter guides resonance breathing
Binaural beatsSupport state shiftsAudio frequencies integrated into sessions
ERP assessmentsObjective cognitive trackingMeasures P300 latency, peak alpha frequency, reaction time

Hi Phoenix friend,

Here's a question that keeps me up at night:

How do I know if what I'm doing is actually working?

I take supplements. I exercise. I track my sleep. I've optimized my diet. I do all the things the research says should protect my brain.

But my brain doesn't come with a dashboard.

I can see my cholesterol on a blood test. My VO2 max on my watch. My HRV every morning. But cognition? Processing speed? Whether my brain is aging faster or slower than it should?

That's mostly... guesswork.

Until now.

The Feedback Loop Problem

I run The Phoenix Community, a platform for APOE4 carriers (people with a genetic variant that significantly increases Alzheimer's risk). I'm an APOE4/4 carrier myself. Two copies of the gene. Roughly 60% lifetime risk.

So I'm not doing this for fun. This is survival.

Over the past year, we've run studies on photobiomodulation helmets and vagus nerve stimulation devices. We've tracked supplements and exercise and sleep interventions across hundreds of members.

And we keep running into the same problem.

People do interventions. They feel better. Or they don't. But "feeling sharper" isn't data. It's not something you can optimize. It's not something that tells you whether to continue, adjust, or abandon what you're doing.

We needed objective cognitive tracking. Something that could measure whether interventions actually move the needle on brain function.

That's why we're partnering with Sens.ai.

Checkout our Q&A with Sens.ai CEO Paola

What is Sens.ai?

Let me explain what this thing actually is. Because it's not what you might expect.

Sens.ai is a neurofeedback headset. But neurofeedback is just one piece. It combines five different modalities:

1. Neurofeedback (the core)

Your brain produces electrical signals. Different patterns correspond to different mental states (focused, relaxed, creative, anxious). Neurofeedback makes these invisible patterns visible.

Here's how it works: sensors on your scalp read your brainwaves in real-time. That signal gets converted into audio and visual feedback. When your brain hits the target state, you get positive reinforcement (the sound gets louder, the image gets clearer). When it drifts, the feedback dims.

It's like a hands-free video game. Your brain learns to reproduce the states that get rewarded.

The research on neurofeedback spans 50+ years. It's been used for ADHD, anxiety, PTSD, concussion recovery, and cognitive enhancement. The best clinical protocols typically cost $15,000+ for a week of treatment [1].

Sens.ai took those protocols and put them in a $1,250 headset you can use at home.

2. Photobiomodulation

Near-infrared light (810nm wavelength) delivered through the skull. This primes your brain before training. Think of it as a warm-up.

If you've followed our previous studies, you know we've been tracking photobiomodulation for a while. Sens.ai's version includes binaural beats and guided meditations during the light therapy, making the experience more immersive.

3. HRV Biofeedback

A pulse oximeter on the ear cup measures your heart rate variability. The app guides you through resonance breathing to activate your parasympathetic nervous system.

This is the foundation. You can't train higher brain states effectively when your nervous system is in fight-or-flight mode. HRV biofeedback calms you down first.

4. Binaural Beats

Audio frequencies that support state shifts. Nothing revolutionary on its own, but integrated well into the overall experience.

5. ERP Assessments (This is the key part)

Event-Related Potentials. Objective cognitive tests that measure:

  • P300 latency: How fast your brain processes new information and makes decisions

  • Peak Alpha Frequency: A biomarker linked to cognitive performance and intelligence

  • Reaction time and accuracy

  • Impulse control

These aren't subjective questionnaires. They're measurements of your brain's electrical response to specific stimuli. You can track them over time. You can see if they improve.

And here's what gets me excited: Sens.ai is developing a biological brain age clock in partnership with the Buck Institute (the largest longevity research organization in the US). Coming in April 2025.

This will tell you if your brain is aging faster or slower than expected. Not based on how you feel. Based on measurable neural signals.

The Data So Far

Sens.ai has published results from their protocols [2]:

Sleep Nirvana Mission (4-week sleep protocol):

  • 77% reported improved sleep quality

  • 7.5% faster reaction time

  • 40% improvement in impulse control

  • 7.4% faster brain processing speed (P300 latency)

Sharp Mind Mission (designed for cognitive aging):

  • Improvements in peak alpha frequency (typically declines with age)

  • Enhanced P300 markers

  • Better reaction time and accuracy

The company has a good track record of transparency. They publish white papers with their results. They're building a learning system that continuously measures outcomes across users.

Is it perfect evidence? No. These are company-published studies, not independent peer-reviewed trials. But the underlying science of neurofeedback is well-established [3][4], and having objective before/after measurements is a massive improvement over "I think I feel better."

Why This Matters for APOE4 Carriers

APOE4 carriers face a specific challenge: brain changes can begin 20-30 years before cognitive symptoms appear [5].

That means the window for intervention is now. Not when we start forgetting names. Not when we can't find our keys. Now.

But it also means we're flying blind. We don't have symptoms to track. We don't have obvious feedback on whether our interventions are working.

Research shows that cognitive engagement may be particularly protective for APOE4 carriers [6]. Active brain training (not passive consumption) appears to reduce amyloid deposition in carriers more than non-carriers [7].

Neurofeedback is essentially structured cognitive engagement. Your brain actively works to achieve target states. It's exercise for neural pathways.

Combined with objective tracking, this gives us something we've never had: a feedback loop for brain health.

How the Study Works

We're opening this partnership to everyone. Phoenix Community members and non-members alike.

Here's the deal:

  1. Go to sens.ai/phoenix

  2. Use code PHOENIX for $100 off ($1,150 instead of $1,250)

  3. Try it for 60 days (satisfied or reimbursed guarantee, no risk)

  4. Use whatever mode works for you (Sharp Mind, Sleep Nirvana, Attention Mastery, etc.)

Unlike our previous studies, this one is open-ended. No rigid protocol. Use the device the way that makes sense for your goals.

If you're a Phoenix Community member:

  • Opt in to the study in the Phoenix app

  • Log your sessions in your daily check-ins (mode, duration, experience)

  • Connect your wearables (Oura, Whoop, Apple Health) once our app update launches

  • We'll correlate your Sens.ai sessions with your sleep, HRV, and subjective wellbeing data

If you're not a member: You can still participate. But you won't have the same tracking infrastructure. Sens.ai provides its own assessments, which is valuable. But combining those with daily check-ins, biomarker tracking, and wearable data gives a much more complete picture.

If you're serious about this, consider joining The Phoenix Community. We're building the tracking tools specifically for this purpose.

Practical Details

Price: $1,150 with code PHOENIX (normally $1,250)

Subscription: $29/month for the personal membership (required for the AI-guided protocols)

Family plan: Coming Q1 (~$45/month for multiple users sharing one headset)

Shipping: Worldwide (US, Canada, UK, Australia, Europe, etc.)

Return policy: 60-day satisfaction guarantee. Use it for two months. If it doesn't work for you, return it.

Best results: 8+ weeks of consistent use, 15+ minutes per session, 5 times per week

What We're Building

This partnership is part of a larger vision.

At Phoenix, we're trying to solve the measurement problem for brain health. We're building a platform where you can:

  • Track your interventions (supplements, devices, lifestyle changes)

  • Log your daily experience (energy, focus, sleep quality, mood)

  • Connect your wearables (continuous HRV, sleep architecture, activity data)

  • Upload your blood tests (we have AI analysis for APOE4-specific biomarkers)

  • Run structured experiments with peer accountability

And now, with partners like Sens.ai, add objective cognitive assessments to the mix.

The goal? Know what's working. Stop guessing. Optimize based on data.

If you're an APOE4 carrier (or just someone serious about cognitive longevity), this is the kind of infrastructure you need.

The Bottom Line

Neurofeedback has 50 years of clinical research behind it. Sens.ai makes it accessible at home. They include objective cognitive assessments. They're building a brain age clock.

There's a 60-day money-back guarantee. Zero risk.

If you're already spending money on brain supplements, sleep trackers, and health optimizations, this is a tool that might actually tell you if those things are working.

Link: sens.ai/phoenix
Code: PHOENIX ($100 off)

Try it. Track it. Let's see what the data shows.

References

[1] Clinical neurofeedback protocols typically range from $150-200 per session, with 10-30 sessions recommended. Five-day intensive programs at top clinics can cost $15,000+.

[2] Sens.ai User Results. Sleep Nirvana Mission Protocol and Sharp Mind Mission data. https://sens.ai/results

[3] Marzbani H, Marateb HR, Mansourian M. Neurofeedback: A Comprehensive Review on System Design, Methodology and Clinical Applications. Basic Clin Neurosci. 2016 Apr;7(2):143-58. https://pubmed.gov/27303609

[4] Zoefel B, Huster RJ, Herrmann CS. Neurofeedback training of the upper alpha frequency band in EEG improves cognitive performance. Neuroimage. 2011 Jan 15;54(2):1427-31. https://pubmed.gov/20850552

[5] Bateman RJ, et al. Clinical and biomarker changes in dominantly inherited Alzheimer's disease. N Engl J Med. 2012;367(9):795-804. https://pubmed.gov/22784036

[6] Berkowitz CL, Mosconi L, Rahman A, et al. Clinical Application of APOE in Alzheimer's Prevention: A Precision Medicine Approach. J Prev Alzheimers Dis. 2018;5(4):245-252. https://pubmed.gov/30298183

[7] Landau SM, et al. Association of lifetime cognitive engagement and low β-amyloid deposition. Arch Neurol. 2012;69(5):623-629. https://pubmed.gov/22271235

Join the study: sens.ai/phoenix | Code: PHOENIX
Join The Phoenix Community: thephoenix.community
Questions? kevin@thephoenix.community

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FAQ

Frequently asked questions.

What is Sens.ai and how does it work?
Sens.ai is a home neurofeedback headset that combines five modalities: neurofeedback using real-time EEG, near-infrared photobiomodulation at 810nm, heart rate variability biofeedback through an ear pulse oximeter, binaural beats, and Event-Related Potential assessments. Sensors on the scalp read brainwaves and convert them into audio and visual feedback so users train their brains toward target states, similar to a hands-free video game. The device brings clinical-grade neurofeedback protocols, which normally cost over 15,000 dollars for a week, into a 1,250 dollar home device.
Why do APOE4 carriers need objective cognitive tracking?
APOE4 brain changes can begin 20 to 30 years before cognitive symptoms appear, meaning the window for intervention is now, not when memory problems emerge. Without symptoms to track, carriers are flying blind on whether supplements, exercise, and sleep interventions are actually protecting their brains. Objective tools like Sens.ai measure P300 latency, peak alpha frequency, reaction time, and accuracy, giving carriers a feedback loop comparable to what blood tests provide for cardiovascular health. That transforms prevention from guesswork into a data-driven protocol.
What results has Sens.ai published?
Sens.ai has published data from two main protocols. The Sleep Nirvana Mission, a four-week sleep protocol, reported 77 percent of users with improved sleep quality, 7.5 percent faster reaction time, 40 percent improvement in impulse control, and 7.4 percent faster brain processing speed measured by P300 latency. The Sharp Mind Mission, designed for cognitive aging, showed improvements in peak alpha frequency (which typically declines with age), enhanced P300 markers, and better reaction time and accuracy. These are company-published results rather than independent peer-reviewed trials.
What are ERP assessments and why do they matter for brain health?
ERP stands for Event-Related Potentials. They are objective cognitive tests that measure the brains electrical response to specific stimuli, including P300 latency (how fast the brain processes new information and makes decisions) and peak alpha frequency (a biomarker linked to cognitive performance). Unlike subjective questionnaires, ERPs give numbers that can be tracked over time to see if interventions actually improve brain function. Sens.ai is also partnering with the Buck Institute to develop a biological brain age clock based on these neural signals.
How much does the Sens.ai headset cost for Phoenix members?
With the code PHOENIX, the headset is 1,150 dollars instead of 1,250. A personal membership subscription runs 29 dollars per month and is required for the AI-guided protocols. A family plan at roughly 45 dollars per month allowing multiple users on one headset is coming Q1. Sens.ai ships worldwide and offers a 60-day satisfaction guarantee so users can try it risk-free. Best results are seen with at least 8 weeks of consistent use, 15 minutes per session, 5 times per week.
Is neurofeedback scientifically validated?
Neurofeedback has over 50 years of clinical research behind it, with applications in ADHD, anxiety, PTSD, concussion recovery, and cognitive enhancement. The underlying science is well-established. Active cognitive engagement, which is essentially what neurofeedback provides, appears particularly protective for APOE4 carriers and may reduce amyloid deposition more in carriers than non-carriers. Sens.ai takes these clinical protocols and makes them accessible at home, paired with objective before and after measurements that move beyond subjective impressions of feeling sharper.
Why This Matters for APOE4 Carriers
APOE4 carriers face a specific challenge: brain changes can begin 20-30 years before cognitive symptoms appear [5]. That means the window for intervention is now . Not when we start forgetting names. Not when we can't find our keys. Now. But it also means we're flying blind. We don't have symptoms to track. We don't have obvious feedback on whether our interventions are working. Research shows that cognitive engagement may be particularly protective for APOE4 carriers [6]. Active brain training (not passive consumption) appears to reduce amyloid deposition in carriers more than non-carriers [7]. Neurofeedback is essentially structured cognitive engagement. Your brain actively works to achieve target states. It's exercise for neural pathways. Combined with objective tracking, this gives us something we've never had: a feedback loop for brain health.
How the Study Works
We're opening this partnership to everyone. Phoenix Community members and non-members alike. Here's the deal: Go to sens.ai/phoenix Use code PHOENIX for $100 off ($1,150 instead of $1,250) Try it for 60 days (satisfied or reimbursed guarantee, no risk) Use whatever mode works for you (Sharp Mind, Sleep Nirvana, Attention Mastery, etc.) Unlike our previous studies, this one is open-ended. No rigid protocol. Use the device the way that makes sense for your goals. If you're a Phoenix Community member: Opt in to the study in the Phoenix app Log your sessions in your daily check-ins (mode, duration, experience) Connect your wearables (Oura, Whoop, Apple Health) once our app update launches We'll correlate your Sens.ai sessions with your sleep, HRV, and subjective wellbeing data If you're not a member: You can still participate. But you won't have the same tracking infrastructure. Sens.ai provides its own assessments, which is valuable. But combining those with daily check-ins, biomarker tracking, and wearable data gives a much more complete picture. If you're serious about this, consider joining The Phoenix Community . We're building the tracking tools specifically for this purpose.
What We're Building
This partnership is part of a larger vision. At Phoenix , we're trying to solve the measurement problem for brain health. We're building a platform where you can: Track your interventions (supplements, devices, lifestyle changes) Log your daily experience (energy, focus, sleep quality, mood) Connect your wearables (continuous HRV, sleep architecture, activity data) Upload your blood tests (we have AI analysis for APOE4-specific biomarkers) Run structured experiments with peer accountability And now, with partners like Sens.ai , add objective cognitive assessments to the mix. The goal? Know what's working. Stop guessing. Optimize based on data. If you're an APOE4 carrier (or just someone serious about cognitive longevity), this is the kind of infrastructure you need.
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