You're Forgetting Words, Losing Focus, and Walking Into Rooms For No Reason. Here's What's Actually Happening.

The word is right there.

You can feel it. It's on the tip of your tongue. You can almost see the shape of it. But it won't come.

Your colleague is looking at you. The pause is stretching. You say "the thing — you know — the..." and wave your hand, hoping they'll fill in the blank.

They do. You laugh it off. But inside, something tightens.

Because this is the third time today.

You walked into the kitchen twenty minutes ago and stood there, staring at the fridge, with no idea why you came in. You opened your laptop to send an email and forgot who it was for. You called your daughter by your son's name. Again.

If you're over 35 and this is starting to feel familiar — keep reading. What I'm about to share changes how you understand what's happening.

I'm the Researcher. And It Happened to Me.

I'm Dr. Sarah Mitchell. I've spent 14 years studying how the brain produces energy at Stanford University School of Medicine.

Three years ago, at 46, I was presenting at a conference in Boston. Mid-sentence, in front of 300 colleagues, I lost a word. Not a difficult word. A word I've said ten thousand times in my career.

I stood at the podium, mouth open, and it was gone. Like someone had reached into my head and pulled it out.

I wasn't being dramatic. I was scared. My father had been diagnosed with early-onset dementia at 52. I watched him go from the sharpest man I knew to someone who couldn't remember his grandchildren's names. I had promised myself it would never happen to me. Now, at 46, it felt like it was starting.

For months I'd been losing words mid-conversation. Forgetting why I'd walked into rooms. Reading the same paragraph three times without it sinking in. Writing post-it notes for things I'd never had to write down before.

I told myself it was stress. Then age. Then perimenopause.

None of those were the real answer.

Your Brain Is Running Out of Fuel. And Nobody Is Testing For It.

Here's what I found when I stopped guessing and started looking at the data:

Your brain weighs about 1.4 kilograms. That's roughly 2% of your body weight. But it consumes 20% of your body's total energy supply. Every second. Every hour. Every day.

Your brain is the single most energy-hungry organ you have. And here's the part that matters:

That energy is produced by a molecule called NAD+. You don't need to remember the name. What you need to know is this:

NAD+ is the fuel your cells use to produce energy. Your brain burns through more of it than any other organ. And your levels have been dropping since your mid-20s.

By 40, your NAD+ levels are roughly half what they were at 25. By 60, you're running on less than a quarter.

Left: Brain with full NAD+ supply — all neural pathways active. Right: NAD+ depleted brain — pathways dimming, signals delayed.

The Three Mistakes Almost Everyone Makes

When the fog rolls in, people reach for the same three explanations. I did too. Here's why none of them are right:

Mistake #1: Blaming stress

"I'm just overwhelmed. Too much on my plate. Once things settle down, my brain will be fine."

It won't. Stress worsens the fog — the stress hormone cortisol burns through NAD+ even faster — but the fog was there before the stress got bad. The proof is your weekends. Your holidays. The fog doesn't lift when the pressure drops. It's there all the time now.

Mistake #2: Blaming age

"I'm 47. This is just what happens."

No. This is what happens when your brain's fuel supply drops by half and nobody tells you. Plenty of 70-year-olds are razor-sharp. Plenty of 42-year-olds can't remember where they parked. The difference isn't age. It's cellular energy.

Mistake #3: Trying brain supplements

Ginkgo biloba. Lion's Mane mushroom. Omega-3. B vitamins. Magnesium.

How many are in your drawer right now?

These supplements try to sharpen how your brain sends signals. But if the brain doesn't have enough energy to fire those signals in the first place, it doesn't matter. It's like upgrading the software on a laptop with a dying battery.

So What Actually Works?

For decades, the only way to raise NAD+ levels was through IV infusions at specialised clinics. Each session cost £250–500 and took 2–4 hours. Effective, but completely impractical for daily life.

Then researchers found that NAD+ could be restored through an oral supplement. Taken as a daily capsule, it enters the bloodstream, reaches your brain, and gets to work where your cells need it most.

No IV drips. No clinic visits. No needles.

The research has been published in leading science journals including Nature and Science. Over 10,000 studies support the role of NAD+ in how your cells produce energy — and the brain research is some of the strongest.

What Happened When I Started Taking NAD+

I started with two capsules every morning with breakfast. Here's my timeline:

NAD+ didn't make me smarter. It didn't give me superhuman focus. It gave me back what I'd lost: the clarity I used to take for granted, the way words came easily, the ability to hold a thought all the way to the end without it falling apart.

Why I Recommend One Product Specifically

After testing dozens of NAD+ products, I was frustrated. Most had low doses, no independent testing, or came from facilities with no outside oversight.

64% of NAD+ supplements sold online fail basic purity testing.

Then a colleague introduced me to a small Scandinavian lab that was doing things differently.

The product is from

Scandic Health Labs built what most supplement companies never bothered to: a complete NAD+ system — not a single ingredient, but four working together.

• NAD+ — the direct fuel your brain and body use for energy production and repair
• Trans-Resveratrol — activates the proteins that put NAD+ to work repairing your cells
• Vitamin B3 — helps your body recycle NAD+ throughout the day so levels stay consistent
• TMG (Trimethylglycine) — supports the process that keeps the whole cycle running

Third-party tested. No fillers, no hidden ingredient mixes. Manufactured in Scandinavia under EU pharmaceutical standards.

Two capsules. Once per day. With or without food.

It's what I take every morning. It's what I give my husband. And it's the only NAD+ product I recommend to colleagues.

The Numbers You're Already Running

One Thing Worth Knowing

Scandic Health Labs makes their NAD+ capsules in small batches — around 3,000 units a month. They've sold out twice in the last four months.

As of writing, stock is available. But if you're reading this weeks after publication, I'd check sooner rather than later.

They offer a 30-day feel-it-or-free guarantee. If you don't notice a difference in the first 30 days, you get a full refund. No questions, no hassle.

Most people report noticing a difference within 2–3 weeks.

You Have Two Options

Option 1: Keep going as you are. Keep Googling "early dementia signs" at 11pm. Keep writing post-it notes for things you used to know cold. Keep laughing off the word blanks and hoping nobody clocks it.

Option 2: Address the root cause. Two capsules a day for 30 days. Pay attention in week two. If the fog hasn't started to shift, it costs you nothing.

I know which one I chose. And I know what word I never lost again.

Dr. Sarah Mitchell is an energy and aging researcher at Stanford University School of Medicine. She has published 23 research papers on NAD+ and how cells produce energy. She is not employed by Scandic Health Labs and receives no commission on sales. This article reflects her independent research and personal experience.

P.S. — If you've been Googling your symptoms late at night, scared that this is the start of something worse — stop. It's not your mind failing. It's your brain running low on fuel. And fuel can be replenished. Check availability here.

P.P.S. — If you're reading this for someone you love — a partner who keeps misplacing things, a parent who's started writing everything down — the 30-day guarantee means there's nothing to lose. Sometimes the best gift is the one that gives them back to themselves.