A note from Dr. Nipun Aggarwal, M.D.
Why you're exhausted after 40 — and it's not "just age."
If a doctor has ever looked at your labs and said "everything looks normal" while you were falling apart in the chair — this is for you. And it's for every person in your life who's been told the same thing.
I've spent 15 years in internal medicine. I've watched thousands of people — smart, high-functioning, "doing everything right" — walk in convinced they were losing their minds. Their labs came back "within range." Their doctors sent them home. And they kept unraveling.
Here's the truth we don't tell you in the 12-minute appointment: "normal" bloodwork was calibrated on sick people. A TSH of 4.2 is "normal." So is a vitamin D of 32. So is a morning cortisol of 8. Every one of those numbers is a person who cannot get out of bed.
The three root causes standard labs miss.
1. Cellular energy collapse (mitochondrial fatigue)
Your mitochondria — the tiny power plants inside every cell — start losing capacity in your late 30s. By your mid-40s, most people are running on 40-60% of the cellular energy they had at 25. No blood test on the standard panel measures this. You feel it as: wired-but-tired, 3pm crashes, brain fog, workouts that wreck you for three days.
2. The low-cortisol epidemic
For 20 years wellness culture blamed high cortisol for everything. The research has quietly flipped. What's actually driving chronic fatigue, weight gain around the middle, and "I can't handle stress anymore" in people 40+ is chronically low cortisol — an adrenal system that has been over-signaled for so long it stopped responding.
Full breakdown of the low-cortisol epidemic →
3. Nutrient depletion the "multivitamin" can't fix
Modern soil has 40% fewer minerals than it did in 1950. Modern stress burns through B-vitamins, magnesium, and zinc at accelerated rates. And nearly every over-the-counter multivitamin uses the cheapest, least-bioavailable form of every nutrient inside it. You are taking a supplement your body can't actually absorb.
What actually works.
You don't need 27 more supplements. You need the right three or four, at clinical-grade doses, in bioavailable forms, matched to your specific depletion pattern. That's what we do at Nūjeva. It's why we built the RootDecoder — a $29 assessment that maps your symptoms to the root cause and tells you exactly what to take (and, honestly, what to skip).
Your next step
Find your root cause in 5 minutes.
RootDecoder maps your symptoms to their underlying root causes and returns a personalized protocol built around them.
— Dr. Nipun Aggarwal, M.D., Board-Certified Internal Medicine