How We Rate Senior Health Supplements: Our Methodology

Every product on this site carries a numbered seal — the same gold-bordered badge shown on our homepage. Our About page explains why this board exists in the first place. This page is different: it opens up the actual mechanics behind that number — the six things we check, how much weight each one carries, and, just as important, what the resulting score does and doesn't tell you.

None of this is proprietary or hidden. If you can read a supplement label and find a clinical trial, you can reconstruct our score for any product yourself. That's on purpose — a rating you can't check isn't a rating, it's a marketing claim wearing a badge.

The six factors we score

Every product that carries our seal is evaluated against the same six factors, in the same order, regardless of whether it's a brand we've covered for years or one we're reviewing for the first time.

What we're actually checking, factor by factor

1. Label transparency & disclosed dosages

We start with the panel itself, not the packaging around it. A product loses points immediately for hiding its actives inside a "proprietary blend" — a total milligram figure with no per-ingredient breakdown makes it impossible for anyone, including us, to compare the formula against research. We check whether the form of each ingredient is specified (a mineral citrate versus a cheaper oxide, for instance), whether serving size matches what's used in the directions, and whether anything active is disclosed only in an ingredient list but omitted from the "Supplement Facts" panel a reader is more likely to actually scan.

2. Third-party certification status

A manufacturer's own quality-control claim is a starting point, not evidence. We look for certification from an independent body — NSF, USP, Informed Choice, or a comparable outside lab — and we distinguish between a product that's actually certified, one that's merely "made in a facility that follows" a standard, and one that makes no verifiable claim at all. Only the first counts fully in this factor's score; the other two are treated as partial or absent, respectively.

3. Manufacturer transparency

We try to establish who is actually behind a product: a named company, a real corporate address, and, where it's disclosed, the manufacturing standard the facility operates under. A brand that's reachable, named, and willing to put its manufacturing practices in writing scores higher here than one that operates behind a storefront with no identifiable operator. This factor is about accountability — if something goes wrong, is there someone to actually reach?

4. Real-world evidence quality vs. marketing claims

This is the factor we weight most heavily, and the one most often responsible for a lower score on an otherwise well-known product. We start from the specific claim being made, find the research it's supposedly based on, and check three things: was it tested in humans or only in animals or a lab dish; was the dose used in that research the same dose actually in the bottle, or a much higher one; and was the study funded independently or by a company with a financial interest in the result. A confident-sounding claim resting on a rodent study, or on a human trial that used triple the labeled dose, gets scored on the evidence that actually exists — not on how the claim is worded.

5. Price & value

Once we know what's actually verified — real dosages, real certification, real evidence — we check whether the price reflects that. Two products can cost the same per bottle and score very differently here if one delivers a clinically studied dose per serving and the other requires four capsules a day to approach it. We also flag subscription structures that make it deliberately hard to find the one-time price before checkout.

6. Customer service & guarantee terms

Finally, we check what happens after the purchase: whether a money-back guarantee is time-boxed in a way that's actually usable, whether return shipping is covered or quietly shifted to the customer, and whether a real support channel exists and responds. A generous-sounding guarantee that's structurally difficult to invoke is scored as if it were a weaker guarantee, because in practice it is one.

How the six factors combine into one score

Not every factor carries equal weight. Whether a product does what it claims, safely, at the dose on the label, matters more to the final number than whether its checkout page is well designed — so evidence quality and label transparency together make up the majority of the score, while value and customer service round it out:

• Real-world evidence quality vs. marketing claims — 30%. The single largest factor, because it determines whether the core claim is defensible at all.
• Label transparency & disclosed dosages — 25%. A product can't be evaluated on the other factors if we can't first confirm what's actually in it.
• Manufacturer transparency — 15%. Accountability for what happens if the first two factors turn out to be wrong.
• Third-party certification status — 15%. Independent confirmation of the manufacturer's own claims.
• Price & value — 10%. Whether the cost is proportionate to what's actually verified.
• Customer service & guarantee terms — 5%. The smallest weight, but not zero — a rating should reflect the whole experience, not just the ingredient panel.

A product can score well on price and service and still land in a low tier overall if the evidence and label factors are weak — those two alone can account for well over half the final number. That's deliberate: a well-run checkout page doesn't make a thin formula more effective.

What the tiers actually mean

The number resolves into one of three verification tiers, shown as the seal on every product page:

What a high rating does not mean

This is worth stating plainly, because it's easy for a badge to be misread as more than it is. A high score on this site does not mean a product treats, cures, or prevents anything. It does not mean the product will work for you personally, and it is not a medical recommendation. What an "Editorially Verified" rating actually certifies is narrower and more honest than that: the label is transparent about what's in the product and at what dose, that dose is either independently certified or reasonably consistent with what the manufacturer discloses, and the specific claims being made are supported by real, human-based evidence at a comparable dose — for that category of product. It is a statement about transparency and evidentiary support, not a guarantee of a personal outcome.

What a low rating does not mean

The reverse deserves the same honesty. A product landing in "Under Review" is not automatically unsafe, and we're not asserting it doesn't work. Most often it means one specific thing broke down in our checklist: a proprietary blend that hides individual doses, a certification claim we couldn't verify with the certifying body, or a marketing claim that outran the research it cited. A newer or smaller manufacturer can also score lower simply because less independent research exists on its specific formulation yet — that's a statement about available evidence, not a verdict on the company's intentions.

How this stays separate from our affiliate relationships

We disclose our affiliate relationships in full on our Affiliate Disclosure page, and the short version bears repeating here: an affiliate link, or the lack of one, is not one of the six factors above and never enters into the scoring conversation. The person doing the label and evidence check does not see, and does not need to see, which products carry a commission. A product can carry a link to an authorized retailer and still land in "Under Review" — several entries in our index do exactly that — and that outcome is the check working as intended, not a failure of it.

How and when a rating changes

A rating is not permanent. We re-check a product's score whenever we become aware of a reformulation, a change in the manufacturer's disclosed sourcing or certification status, or new independent research relevant to a core ingredient — and we run a periodic pass over our full index on a rolling basis regardless of whether anything has been flagged. When a score changes, the product page reflects the new figure and the reasoning behind the change; we don't quietly adjust a number without a record of why.

This page describes an editorial evaluation process. Verification scores and tiers are the judgment of The Senior Health Review's editorial team based on publicly available and disclosed information; they are not laboratory test results we generate ourselves, not medical advice, and not a claim that any product diagnoses, treats, cures, or prevents any disease. Talk to a healthcare provider before starting any new supplement or changing an existing routine.