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NAD+ injection kit from $199/mo — physician-prescribed
ZENKAI NAD+

NAD+ injections.
Cellular energy.
Physician-prescribed.

NAD+ is the coenzyme that powers every cell in your body. Levels drop 50%+ by age 60. Subcutaneous NAD+ injections restore levels that no oral supplement can match. Prescribed online. Delivered to your door.

  • ✓Subcutaneous injection kit — delivered to your door complete
  • ✓Licensed US physician prescribes your protocol
  • ✓Compounded by an FDA-regulated US pharmacy (Empower)
  • ✓Stacks with peptides, TRT, and GLP-1 protocols
  • ✓Cancel anytime  ·  No commitment required
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🔒 HIPAA-secure. You only pay if prescribed.
ZENKAI NAD+ — SELECT YOUR PROTOCOL
Physician-prescribed NAD+ therapy
Choose your protocol
NAD+ Standard Most Popular
100mg/ml · 5 injections/week
$199
/month
NAD+ High-Dose
250mg/ml · 5 injections/week
$299
/month
NAD+ + Glutathione Stack Best Results
NAD+ + antioxidant combo
$349
/month
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🔒 Free shipping · Kit includes vials, syringes, and instructions
The Science

Why NAD+ declines — and why it matters.

NAD+ is not a supplement trend. It is the most fundamental coenzyme in human biology, and its decline is directly linked to aging, fatigue, and disease.

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Cellular energy production
NAD+ is the key substrate for mitochondrial function. Every ATP molecule your cells produce requires NAD+. Lower NAD+ = lower energy production = fatigue, brain fog, and poor recovery.
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DNA repair activation
NAD+ activates sirtuins (SIRT1-7) — the proteins responsible for DNA repair and cellular maintenance. Higher NAD+ levels correlate directly with better cellular repair and longevity markers.
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50% decline by age 60
NAD+ levels peak in your 20s and decline steadily throughout life. By age 60, most people have 50% less NAD+ than they did at 20. Injections restore levels to a younger biological baseline.
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Cognitive performance
NAD+ supports neuronal function, synaptic plasticity, and neurotransmitter synthesis. Most patients report significantly improved mental clarity, focus, and memory within 4 weeks of starting injections.
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Injection vs oral — no comparison
NAD+ is broken down in the gut and poorly absorbed orally. Even 1,000mg oral NMN/NR supplements deliver a fraction of what 100mg subcutaneous NAD+ injection achieves. Injection is the only clinically meaningful route.
🌟
Stacks with everything
NAD+ amplifies the effects of TRT, peptides, and GLP-1s by improving mitochondrial function at the cellular level. Most serious biohackers stack NAD+ with at least one other ZENKAI protocol.
The Process

Your NAD+ kit. Delivered complete.

1

Online assessment

Answer health questions online. A US physician reviews your case and determines the right NAD+ protocol for your goals.

2

Kit ships to you

Your complete injection kit arrives — NAD+ vials, syringes, needles, alcohol swabs, sharps container, and step-by-step guide.

3

Self-inject at home

Subcutaneous injection is simple and virtually painless — similar to insulin injections. Takes under 2 minutes. No clinic visit.

4

Monthly refills

Physician monitors your progress. Refill kits ship automatically every month. Adjust your dose or protocol anytime.

Patient Experiences

What NAD+ patients report.

"I was skeptical. Three weeks in and the difference in energy is remarkable. I wake up and actually feel rested. Brain fog I'd attributed to aging is just gone."
ZENKAI care team
"I stack NAD+ with my TRT and BPC-157. The combination is genuinely life-changing. Recovery from workouts is faster than when I was 30. I'm 54."
ZENKAI care team
"My cognitive performance has measurably improved. I work in finance and the mental clarity difference is significant. Worth every cent."
ZENKAI care team
FAQ

NAD+ injections — answered.

What is NAD+ and why inject it instead of taking a pill?
NAD+ is a coenzyme essential for cellular energy production and DNA repair. Oral NAD+ (and even oral NMN/NR precursors) have poor bioavailability because they're broken down before reaching the bloodstream at therapeutic levels. Subcutaneous injection delivers NAD+ directly into the body at concentrations that actually affect mitochondrial function. It's not even a fair comparison.
How painful are subcutaneous NAD+ injections?
Virtually painless. Subcutaneous injections use a very small needle into the fat layer just under the skin — similar to insulin injections used by millions of diabetics daily. Most patients describe it as a brief pinch at most. The entire process takes under 2 minutes.
How quickly will I notice results from NAD+ injections?
Energy and mental clarity improvements typically become noticeable within 2–4 weeks. Sleep quality improvements often appear sooner. Peak benefits are typically seen at 6–8 weeks of consistent use. Results are cumulative — the longer you stay on protocol, the more pronounced the benefits.
Can I stack NAD+ with TRT, peptides, or GLP-1s?
Yes — and this is one of the most powerful stacks in longevity medicine. NAD+ improves mitochondrial function at the cellular level, amplifying the effects of TRT (by supporting testosterone-related energy pathways), peptides (by accelerating cellular repair), and GLP-1s (by improving metabolic efficiency). Your physician coordinates all protocols.
Is NAD+ FDA-approved?
NAD+ is not FDA-approved as a prescription drug but is compounded legally by FDA-regulated pharmacies under bulk drug substance regulations. ZENKAI uses Empower Pharmacy, one of the largest and most reputable compounding pharmacies in the US.
Start Today

Cellular energy. Restored.

Physician-prescribed NAD+ injection protocol. Complete kit delivered to your door. You only pay if prescribed.

Start Free Assessment →
🔒 HIPAA-secure  ·  Cancel anytime

Complete your protocol

Patients often pair this with

Longevity & PeptidesNAD+ pairs naturally with peptide and longevity protocols.Medical Weight LossSustain energy and focus during a weight-loss protocol.SupplementsRound out cellular health with targeted supplements.
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