Clinically Formulated

Your cells are aging. NAD+ fights back.

Restore the coenzyme that powers every cell in your body. The same molecule studied at Harvard, Stanford, and the NIH.

Start Your Cellular Reset

Physician-Guided

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$99
MO INTRO
Clinically Studied
Harvard · Stanford · NIH

Source: Nature Reviews Molecular Cell Biology, 2021

THE SCIENCE

The molecule your body can't make fast enough.

NAD+ is the master regulator of cellular metabolism. It fuels over 500 enzymatic reactions, powers your mitochondria, and activates the sirtuins that repair your DNA. The problem? Production drops sharply with age — leaving your cells running on empty.

Fuels mitochondrial ATP production — your body's energy currency

Activates SIRT1 & SIRT3 sirtuins for DNA repair and longevity

Reduces oxidative stress and systemic inflammation

Supports healthy circadian rhythm and sleep quality

Get Your NAD+ Now
50%

NAD+ DECLINE BY AGE 50

500+

ENZYMATIC REACTIONS POWERED

94%

CUSTOMERS REPORT MORE ENERGY

WHAT YOU'LL FEEL

Six reasons your body needs NAD+

Every benefit backed by peer-reviewed research. No marketing claims without citations.

Sustained Energy

Restore mitochondrial function for all-day energy without the crash. No stimulants. No jitters. Just cellular power — the way your body was designed to produce it.

Ref: Cell Metabolism, 2020 · PMID 32109443

Faster Recovery

Reduce post-workout inflammation and accelerate muscle repair. Get back to training harder, sooner.

Sports Med, 2022

Mental Clarity

NAD+ supports neuronal health and cognitive function. Experience sharper focus and improved memory recall.

Nat Neurosci, 2021

DNA Repair

Activate sirtuins — the longevity proteins that repair damaged DNA and protect against cellular aging.

Science, 2013

Muscle Performance

Clinically shown to improve muscle function and protect against age-related muscle loss (sarcopenia).

Cell Reports, 2019

Healthy Aging

Slow the biological clock at the cellular level. NAD+ is the most researched longevity molecule in science today — studied at the world's top institutions for over two decades.

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PERFORMANCE MEETS LONGEVITY

Built for the athlete who refuses to slow down.

After 20+ years in the performance space, Fitness RX NAD+ is for the serious adult athlete — the person who trains hard, recovers smart, and demands science-backed results.

Dr. James Harlow, MD
"NAD+ is the most compelling longevity intervention I've seen in 20 years of practice. The research is unambiguous — and the clinical results we see at Fitness RX confirm it."
THE PROCESS

How it works

01

Order Online

Select your supply. Free overnight shipping on all orders. Arrives in 2–4 business days in discreet packaging.

02

Start your Protocol

Consistent use is key — NAD+ levels build over 4–8 weeks.

03

Feel the Shift

Most customers notice improved energy and focus within 2–4 weeks. Athletic recovery improves at 4–8 weeks.

04

Compound Results

The real anti-aging benefits compound over 3–6 months as cellular NAD+ levels are fully restored.

SIMPLE PRICING

Invest in your hormones.

All protocols include free shipping and access to the Fitness RX member portal.

Monthly
3-Month Supply
$149 /intro
$199 /mo after intro
Billed monthly. Cancel anytime.
1000mg NAD+
Free priority shipping
Access to Fitness RX member portal
Personalized dosing guidance
Third-party purity certificate
Start Your Cellular Reset
$99 /intro
$149 /mo after intro
Save $50
Billed every 3 months. Cancel anytime.
1000mg NAD+
Free priority shipping
Access to Fitness RX member portal
Personalized dosing guidance
Pharmaceutical-grade compounded formula
Request This Protocol
Prescription therapy. Requires physician consultation. These statements have not been evaluated by the FDA.
REAL RESULTS

What our members say

4.9 / 5 · 2,847 reviews
"I was skeptical — I've tried every supplement. But after 6 weeks on Fitness RX NAD+, my recovery time dropped noticeably and my morning energy is back to what it was in my 30s. This is the real deal."
M
Marcus T.
Competitive Cyclist, 47
"The mental clarity alone is worth it. I'm coaching 6 classes a day and I used to hit a wall at 3pm. That wall is gone. My clients have started asking what I'm taking."
S
Sandra K.
CrossFit Coach, 44
"I've been doing NAD+ IV infusions at $500 a session. Fitness RX NAD+ give me comparable results at a fraction of the cost. I've switched entirely and haven't looked back."
D
David R.
Entrepreneur & Triathlete, 51
Got Questions

Frequently asked

Your cellular reset ‍starts now.

Join thousands of serious athletes and high-performers who've made NAD+ the cornerstone of their longevity stack.

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Read The Research

Physician-Guided

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Third-Party Tested