How we put the Atlas together.

Primary sources, with context.

We use Tinyfish and Bright Data for discovery and check provider product pages, FDA notices, NIH materials, and original research where relevant. Search snippets help locate information but are not enough to prove a medical claim. Articles link their sources and show a check date. A provider page can establish what is advertised; it cannot independently establish that a treatment works.

Document reviews, not firsthand testimonials.

Our reviews are based on public information checked September 18, 2026. We did not order treatments, interview a representative sample of patients, inspect pharmacies, or independently test medication. We do not invent patient experiences, reviewer credentials, clinical scores, or star ratings. The byline “NAD Atlas editorial desk” identifies the publication, not a licensed clinician. No independent clinical reviewer is claimed.

Featured placement is commercial.

CoreAge Rx is the first featured commercial care option in best-of articles. Supplement comparisons clearly distinguish that clinical service from oral products; we do not describe CoreAge as an NR or NMN supplement. This position is selected for promotion, not earned through a blinded comparison or a clinical scoring system. We disclose it near the beginning of comparison articles and inside the recurring feature banner. Other providers remain visible with links to their own source pages. See the full disclosure.

Prices keep their qualifiers.

We distinguish introductory prices, “from” prices, medication estimates, memberships, and billing intervals. We record unresolved differences rather than choosing a favorable number. A published offer is not a personal checkout quote. Readers should confirm the selected plan, amount due, renewal terms, and cancellation rules directly before paying.

Evidence stays attached to its route.

Biochemistry, animal research, customer surveys, biomarkers, tolerability studies, and controlled human outcomes answer different questions. We do not treat oral precursor findings as proof for a home NAD+ injection or an IV protocol as proof for a nasal product. We identify compounded medicines as not FDA-approved. We do not provide individualized dosing or diagnose a reader from a search query.

What a location page means.

Our nationwide directory includes all 32,058 incorporated and Census-designated places in the 2025 US Census Gazetteer for the 50 states and DC. It does not claim every neighborhood or every unincorporated settlement is included. Names, internal-point coordinates, and land areas come from that dataset. Slugs are normalized place names; duplicate names within a state receive a geographic identifier to preserve a distinct route.

Nearby distances are calculated straight-line estimates between geographic internal points. They are not travel times, route lengths, or distances to verified clinics. Each guide contains nearby-area links, an orientation diagram, provider-checking resources, and online comparisons. A location page does not establish clinic inventory, appointment availability, state eligibility for a brand, or a local average price. Any named regional lead has a linked provider source and explicit verification limits.

Dates and corrections.

“Checked” records the source-review date, not a guarantee that offers remain unchanged. Geography has its own 2025 dataset date. We revise statements when source checks establish a change. Until that happens, readers should confirm time-sensitive details with the provider. Our source register makes the underlying pages accessible for independent checking.

Illustrations are illustrations.

The landscape artwork was generated with an image-generation tool for this publication. It does not show actual patients, clinics, staff, or treatment outcomes. It is used for atmosphere, not evidence. We do not use a synthetic image as a patient testimonial.