A premium supplement asks you to pay more. Our review method checks whether that extra money buys something real. Owen Hartley, our Reviews Editor, works through the same seven steps for every product before a review goes live. Our editor is not a clinician, so the method relies on documents, labels and published research, not on personal medical opinion.
Step 1: Get the full label before anything else
We start with the supplement facts panel. The sales page comes later. We record:
- Each ingredient, its exact form and its amount per serving.
- Servings per bottle and the suggested daily use.
- Any proprietary blend that hides individual amounts.
- Warnings, allergens and the stated place of manufacture.
A premium brand that will not show its label before checkout gets that fact written into the review as a con.
Step 2: Check doses against the studies
For each main ingredient, we find human studies and note the dose they used. Then we put the label dose beside it. A product can list a well-studied ingredient and still use a small fraction of the tested amount. When the dose is hidden inside a blend, we say we cannot confirm it.
Step 3: Check the ingredient forms
Form is one place where a higher price can be justified. Magnesium glycinate costs more to make than magnesium oxide. Methylated B vitamins cost more than basic ones. Patented extracts with their own studies cost more than generic powders. We note whether the brand paid for the better form or charged a premium for the cheaper one.
Step 4: Look for third-party testing we can see
We look for a certificate of analysis, a named independent lab, or a recognized certification such as NSF or USP. A claim like “lab tested” with no document behind it does not count. We also note GMP facility claims and whether they can be checked.
Step 5: Work out the real cost per day
Premium supplements are often sold in bundles of one, three or six bottles. We divide the price of each option by the number of days it lasts at the suggested dose. We add shipping where it applies. We flag subscriptions that renew automatically and any upsells shown after checkout.
Step 6: Read the refund terms in full
A long guarantee is only useful if you can use it. We check the length of the window, whether opened bottles are covered, who pays return shipping, whether a return authorization is needed, and whether the window starts at order or delivery.
Step 7: Grade the evidence and note safety
Every main claim gets an evidence grade from the table below. We also list known side effects, drug interactions and groups who should talk to a doctor first, such as people who are pregnant, nursing or taking prescription medicine.
Our evidence grades
These grades describe the research behind a claim. They are not a rating of the product.
| Grade | What it means |
|---|---|
| Moderate | More than one human trial supports the claim at a dose close to the label dose. Results are fairly consistent, though studies may be small or short. |
| Limited | Some human data exists, but it is a single trial, a very small group, a different dose or a different form from the one on the label. |
| Weak | Support comes mainly from animal studies, lab studies, traditional use or the brand’s own unpublished data. |
| Avoid | The claim conflicts with the research, no evidence could be found, or there is a known safety concern at the label dose. |
We do not use a Strong grade. Very few supplement claims have the large, repeated trials that would earn it, and we would rather understate than overstate.
What we leave out on purpose
- No scores or star ratings. A single number hides the details that matter.
- No testimonials or before and after stories.
- No claims that a product treats, cures or prevents a disease.
Keeping reviews current
Labels, prices and refund terms change. We recheck published reviews on a regular schedule and when readers report a change. Each review shows the date it was last checked. Spot something out of date? Email hello@tonicnest.com.