Kris Gethin · The coach from the video
Are you ready to finally defeat brain fog?
Not another coffee to cover it up. The actual cause. Brain fog is one of the clearest signs your brain is running short on energy, and that comes down to a molecule called NAD. Here's what I do about mine.
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The supplement from the video
NAD Regen. The complete NAD formula.
$65.45 a month $77.00
15% off with a subscription · cancel anytime
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“No more dreadful morning brain fog. I pop two pills and go conquer my day.”
- 3rd-party tested
- GMP certified
- Non-GMO
- Made in the USA
- Two capsules each morning
Sound familiar?
You don't call it brain fog. You just notice you're not sharp anymore.
Most people reach for another coffee. That covers it for ninety minutes and does nothing about the cause, because the cause is energy production inside your brain cells, and caffeine doesn't touch that.
Focus that won't hold
You read the same paragraph three times and still couldn't tell anyone what it said.
Mental fatigue by mid-afternoon
The work isn't hard. You just can't get into it, and by 3pm you've stopped trying.
Forgetfulness
Names. The reason you walked into the room. What you opened the laptop for in the first place.
Low motivation
Not depression. Just no drive behind anything, including the things you used to want.
That flat feeling
Nothing's wrong. Nothing's sharp either. It's the one nobody has words for, and it's the one that bothers people most.
A quick note from Kris
I'm almost 52. My biological age is 20.
My GlycanAge-tested biological age is 20, and a lot of that I put down to NAD.
Plenty changes as we age. NAD is the change almost nobody talks about, and it's the one I'd fix first. Everything I do to support mine is below, the habits as well as the supplement.
Kris GethinTransformation coach · 25+ years in the trenches
Kris Gethin is an investor and co-owner of BioStack Labs and has a financial interest in its products.
The cause
What is NAD, and why your brain feels it first
Every cell in your body needs energy, and NAD sits at the center of how that energy gets made. Your brain burns around 20% of your body's total energy, more than any other organ you have. So when NAD starts falling, your brain is where you notice it first. That's brain fog. Not a character flaw, not age catching up with you. An energy supply problem.
Your brain feels it first
The most energy-hungry organ you own is the first to run short. Poor focus, mental fatigue and that flat feeling all track the decline. It doesn't arrive overnight. It just never quite lifts.
It powers energy production
NAD is directly involved in how your cells make the energy that keeps you running. Less NAD, and the tank drains faster than it used to.
It plays a role in cellular repair
Your cells repair themselves around the clock, and NAD is part of that process. It's a big reason recovery takes longer at 45 than it did at 25.
Why this starts in your 30s
By 40, half of it is already gone
The decline starts in your 30s and accelerates from there. When I coach anyone over 30, NAD is the first thing I look at. Not the last.
~50%
of your NAD is said to be gone by the time you're 40
NAD supplyNAD demand
The decline
It starts in your 30s. By 40, your NAD is said to be near half of what it was at 20. This isn't a small dip. It's a steady, systemic decline that changes how you feel long before you can name what changed, and it's why the fog tends to creep in rather than arrive. The good news: it's one of the most addressable parts of how we age.
The impact
You don't notice it as one thing. You notice it as everything.
Nobody wakes up and thinks "my NAD is low." You just notice the 3pm wall, the set you cut short, the patience that's gone by bathtime. It shows up as how you show up: at work, at home, and in the gym.
- How you show up at work
- How you show up as a parent
- How you train & recover
- How energized you feel
NAD by the numbers
How I approach it
How I optimize my NAD, year round
I found NAD in my early 40s. You can't stop the decline, but three habits do most of the work of slowing it, and I'd run all three even if I never took a capsule.
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Sleep
Protect your sleep
Sleep is when most of your repair happens, and protecting your NAD is one of the reasons why. My rule: a one-hour pre-bed unwind. No messages, no screens, just something to read that lets your head switch off. Aim for 8 hours. Mine was a wreck for years, so if this sounds impossible right now, I've been where you are. It's the highest-return habit on this page.
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Exercise
Train with intent
Resistance training plus cardio supports NAD by driving mitochondrial biogenesis. You build more of the machinery that makes your energy. Simple prescription: hard weights 4 times a week, cardio 5–7. It's why the people who train look younger, recover faster, and still have something left at the end of the day.
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Nutrition
Eat single-ingredient
One of the highest-impact changes you can make: take your food from wholesome, single-ingredient sources. I'm fussy about sourcing too: wild over farmed salmon, grass-fed over intensively farmed beef, organic veg. It moves the needle on the inflammation that builds as we age, and lower inflammation goes hand in hand with healthier NAD status.
The honest part
What about NAD supplements?
NAD supplements can work. Most of them are heavily compromised: underdosed, built on a single precursor, and marketed a lot harder than they're formulated. Even the IVs and injections deliver limited benefit for what they cost, which is why I'd skip most of them entirely.
And stimulants aren't a fix at all. Caffeine, nootropics, energy drinks: they borrow sharpness from later in the day and charge interest. NAD optimization is the opposite. You're rebuilding the supply instead of drawing it down.
The one I use myself is NAD Regen from BioStack. I've been through the research behind it, BioStack put formula quality ahead of their own margin, and thousands of Americans now start the day with it.
I found it several years ago and, like everything I try, I started out skeptical. They gave me full access to the R&D and the testing, which dealt with half of that. 90 days on it dealt with the rest. I was so impressed by their approach to formulation and the desire to create the best that I joined their health council. I'm proud to say I'm now a co-owner of the brand, having invested in it recently; I believe in their ethos and products that much.
NAD Regen has been with me every morning since I trialled it all those years ago, and it goes in the bag every time I travel; it's a non-negotiable. I send it home to my parents and my wife takes it too. That's the honest measure of what I think of it.
If you're going to try it, and I'll put my reputation on the line and say you should, don't bother unless you'll give it 90 days. NAD optimization doesn't happen overnight. Thirty days and out is just money you've thrown away.
Give it that 90 days and you can see a real lift in cognition and energy that holds through the day, not just the first hour of it. You're also building something that compounds: better cellular health going into the decade ahead. And the 90-day money-back guarantee covers the whole run, so you can call it at any point and pay nothing. That tells you how confident they are.
What's inside
Three ingredients. One complete system.
Not another single-ingredient precursor. A clinically studied trio that pulls all three levers of your NAD economy: produce, recycle and protect.
NAD3®
A non-precursor blend clinically shown to raise NAD+ status. It helps your body make and recycle its own NAD+ while easing the CD38 drain that pulls levels down with age, so you're refilling the tank and plugging the leak. Your brain, the biggest energy consumer you've got, is first in line for the benefit.
Spermidine (Yüth™)
Switches on autophagy, your cells' recycling system, so you get more out of the resources you already have instead of just pouring more in.
Resveratrol (Veri-te™)
Activates the sirtuins that put your NAD+ to work on repair and energy. Raising NAD+ counts for little if nothing spends it. This is what spends it.
Licensed actives
Your offer
Subscribe and save 15%
Save 15% every month. No lock-in, no minimum. Pause or cancel in two clicks, anytime.
Give it a proper run. If the fog hasn't lifted, one email gets you a full refund, even if the bottle's empty.
Real people, real reviews
From customers who use NAD Regen
4.5 average across 150 reviews. Not influencers. Verified purchasers who made it part of their morning, and stayed.
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Verified
The brain fog is gone
No more dreadful morning brain fog. I pop two pills every morning and go conquer my day, like the energy of three coffees in a row, minus the jitters and the anxiety. It's a permanent staple in my longevity stack now.
FPFahd P.
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Verified
I found the fountain of youth
I'm 47, and testing showed my biological age was actually 51. Six months in, I have tests that prove a drastic reduction in my biological age, my cholesterol is lower than ever, and I look and feel years younger. I couldn't recommend it enough.
ADAnthony D.
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Verified
3 months in, my cholesterol dropped 57 points
I'm 26 years in medicine, a 48-year-old father and husband with a busy life. My diet's well controlled and I'm in great physical shape. I started Regen and after 3 months my cholesterol went from 215 to 158. I feel all around better, and I hope these results keep going.
PCPeter C.
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Verified
Better than the injectable NAD I was using
Didn't expect much, but this works better than the injectable NAD I was using. Easily the best NAD product I've tried, and I feel an uptick in energy that actually holds through the day.
MLMatthew L.
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Verified
My deep-sleep and HRV scores improved
Since taking this, my deep-sleep score on my Oura ring has definitely improved, and so has my HRV.
AMAmber M.
Individual results may vary. Reviews are from verified purchasers of NAD Regen.
The honest answers
Questions people ask most
How fast will the brain fog lift?
Some people notice sharper mornings inside a few weeks. Most feel it properly somewhere in the second month. This isn't caffeine: you're rebuilding energy production, and that's a rebuild, not a switch. Run it 90 days before you judge it. The 100% money-back guarantee covers the full 90, so you can decide at any point without paying for a run that didn't work.
Why do you recommend running it for 90 days?
NAD optimization doesn't happen overnight. Thirty days and out is money thrown away. Give it a proper 90-day run and you can see a real lift in cognition and energy that holds through the day, and you're building cellular health that compounds. The 90-day money-back guarantee covers the whole run, so if it hasn't worked you can call it at any point and pay nothing.
Why NAD Regen instead of an NAD IV or injection?
IVs and injections deliver limited benefit for what they cost, and they cost a great deal. I'd skip most of them. NAD Regen fits your bag and your morning instead: two capsules, done. No needles, no clinic appointment, no four-figure bill.
Why does Kris trust this one over other supplements?
Most NAD supplements are heavily compromised. NAD Regen is the one I use myself. BioStack put formula quality ahead of their own margin, and I was given full access to the R&D and testing before I ever put my name near it. I take it every morning, everywhere I travel, and my wife and parents take it too.
What's actually inside it?
Two capsules deliver NAD3® (the engine that raises NAD+ status), Spermidine (Yüth™) for cellular recycling, and Resveratrol (Veri-te™) to activate the sirtuins that put NAD+ to work. It's non-GMO and made in a GMP-certified, FDA-registered facility in the USA. Full supplement facts are on the product page, so always check them if you have specific sensitivities.
How does the offer and subscription work?
Subscribe today and get 15% off every month. No lock-in and no minimum, so pause, skip or cancel in a couple of clicks. Prefer not to subscribe? Take the one-time bottle instead; it carries the same 90-day guarantee.
What if it doesn't work for me?
Then you don't pay for it. Every order is backed by a 100% money-back guarantee for 90 days. Email us and we'll refund you, even if the bottle's empty. The only risk is not trying.
Your move
Start your 90-day run
The decline is coming either way. Now you know what to do about it. This is the one supplement Kris takes every morning and won't travel without. 15% off every month, and 90 days to change your mind.
100% money-back guarantee, 90 days to decide · Two capsules each morning · Cancel anytime