NAD+

A coenzyme central to redox reactions, ATP production, and DNA repair; supplementation (typically via precursors like NMN or NR) aims to raise intracellular NAD+ levels that decline with age.

Mechanism of action from published research — how the molecule behaves, not a claim about any product or any human-use effect.

Studied for metabolic health, cellular energy production, and age-related decline broadly.

• Longevity & anti-agingStudied in aging, cellular-senescence, and mitochondrial-function research.

In clinical trials — more than a dozen human trials of NAD+ precursors confirm they safely raise NAD+ levels, though evidence for clinically meaningful health benefits is limited and mixed.

Where the science stands — an approved drug is not the same as the research-grade material a vendor sells, which is unregulated regardless.

• Independent purity. Look for a third-party COA (Janoshik or MZ) showing a measured purity — not just a number the vendor typed.
• Batch match. The strongest evidence is a certificate for the exact batch you’ll receive, attributed to this vendor — check the cross-verification on the listing.
• Vendor reputation. See how the vendor is talked about in the community before trusting a new name.

Research context only — VialGrade never gives dosing, medical, or human-use guidance.