Methodology
We rank the companies selling NAD⁺. Those rankings are worth something only if you can see how they are produced, so here is the whole thing: the scoring weights, the rules we hold ourselves to, and the one place commercial relationships are allowed to show up.
How a score is calculated
Every provider score is a weighted average of five marks. There is no field anywhere in this site’s data where a score can be typed in by hand — a rank is an output of the table below, and nothing else.
Evidence quality
30%Does the provider's own material describe what NAD⁺ can and cannot do accurately, and does the format they sell have human data behind it?
Price transparency
25%Can you find the real, all-in monthly cost — including the consult and any required labs — before creating an account?
Value for money
20%What you pay against what you receive, compared with the rest of the category.
Ordering experience
15%How straightforward the intake, prescribing and delivery actually are.
Clinical support
10%Access to a real clinician after the sale, and how cancellation is handled.
The scoring function does not read commercial status. It is not weighted low; it is not an input at all. Partners are shown first on category pages and labeled “Partner” — that is display order, and it never touches the number. The clearest evidence we can offer that this holds: the format we rate best on evidence is the one we earn nothing from, and we say so on that page.
- 01
Primary sources, never summaries
Every factual claim is tied to the trial publication, the FDA / DailyMed label, or the peer-reviewed paper of record. We do not cite press releases, secondary blogs, or AI-generated summaries as evidence.
- 02
Citations are live-verified
Before publication, each reference is checked against the source of record — PubMed, DailyMed, ClinicalTrials.gov — to confirm the authors, year, journal, and the specific figure being cited. Citations are never reconstructed from memory.
- 03
Magnitude over vibes
We report effect sizes, hazard ratios, confidence intervals, and durations — not adjectives. Where evidence is preclinical or thin, we say so plainly rather than implying more than the data supports.
- 04
Independence, disclosed
NAD Picks earns revenue through clearly labeled partnerships with vetted telehealth and pharmacy providers. Those relationships are disclosed and never determine a ranking, a verdict, or a safety statement.
- 05
Research, not medical advice
Our work is educational. It is not a substitute for an individualized consultation with a licensed clinician, and we say so on every page that discusses a medication or intervention.
Frequently asked
- What sources does NAD Picks cite?
- Every factual claim is tied to a primary source — the trial publication, the FDA or DailyMed label, or the peer-reviewed paper of record. We do not treat press releases, secondary blogs, or AI-generated summaries as evidence.
- How are citations verified?
- Before publication, each reference is checked against the source of record — PubMed, DailyMed, or ClinicalTrials.gov — to confirm the authors, year, journal, and the specific figure being cited. Citations are never reconstructed from memory.
- Do commercial partnerships affect your verdicts?
- No. NAD Picks earns revenue through clearly labeled partnerships, but those relationships never determine a ranking, a verdict, or a safety statement. Placement can be commercial; the substance of the evidence review is not.
- Is anything on NAD Picks medical advice?
- No. Our work is educational research, not a substitute for individualized care from a licensed clinician. We say so on every page that discusses a medication or intervention.