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Longevity

NAD+ Therapy: What the Science Actually Says

NAD+ levels decline 50% between ages 20-50. Here's what happens when you replenish them.

C

Clyne Health

February 17, 2026 · 3 min read

NAD+LongevityAnti-AgingCellular Health

NAD+ is a coenzyme essential for energy production, DNA repair, and sirtuin activation. NAD+ levels decline approximately 50% between ages 20 and 50, linked to age-related disease.

What NAD+ Does

NAD+ serves as a critical cofactor in mitochondrial energy production, DNA repair via PARP enzymes, sirtuin activation which regulates inflammation and metabolism, and circadian rhythm regulation.

The Evidence

Preclinical studies show NAD+ repletion reversed age-related tissue decline and extended healthy lifespan. A 2024 human trial showed improved walking speed, grip strength, and cognitive scores in adults over 60.

Delivery Methods

Injectable NAD+ bypasses digestive breakdown, ensuring near-100% bioavailability. Results typically appear within 1-2 weeks. Oral supplements have significantly lower bioavailability.

What Clyne Offers

Clyne provides medically supervised NAD+ therapy through subcutaneous injections, nasal spray, and topical cream formulations with provider monitoring.


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Editorial standards

This content is reviewed by Clyne®'s editorial team and grounded in published clinical evidence. Citations are listed at the end of each piece. Clyne® Concierge translates the science; your physician makes all clinical decisions. We never fabricate trial data, patient stories, or outcomes.

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