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.
“No more dreadful morning brain fog. I pop two pills and go conquer my day.”
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.
I'm almost 52. 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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
It's been every morning since, 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.
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 60-day money-back guarantee covers you long before you reach the 90, so you can call it at any point and pay nothing. That tells you how confident they are.
Not another single-ingredient precursor. A clinically studied trio that pulls all three levers of your NAD economy: produce, recycle and protect.
Save 40% on your first month, then 15% every month after. No lock-in, no minimum. Pause or cancel in two clicks, anytime.
That's about $1.54/day your first month, less than the coffee it tends to replace.
4.5 average across 150 reviews. Not influencers. Verified purchasers who made it part of their morning, and stayed.
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 you for the first 60, so you can decide long before you've paid for the full run.
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 60-day money-back guarantee covers you for two thirds of that, so you can decide long before you've paid for the full run.
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.
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.
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.
Subscribe today and get 40% off your first month, then 15% off every month after. 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 60-day guarantee.
Then you don't pay for it. Every order is backed by a 100% money-back guarantee for 60 days. Email us and we'll refund you, even if the bottle's empty. The only risk is not trying.
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. 40% off your first month, and 60 days to change your mind.
* These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Individual results may vary. Kris Gethin is a compensated partner of BioStack Labs. The information on this page is for educational purposes only and is not a substitute for professional medical advice. Always consult your physician before starting any new supplement regimen.
