Every ProveNutra review follows the same method. The steps below are the ones Daniel Brooks, our Reviews Editor, works through before a review is published. He is a researcher and editor, not a doctor, dietitian or pharmacist, so the method is built around checking documents and published research rather than giving clinical opinions.
Step 1: Read the full label
We start with the supplement facts panel, not the sales page. We record:
- Every ingredient and its form (for example, magnesium glycinate versus magnesium oxide).
- The amount per serving and the number of servings per container.
- Whether any ingredients sit inside a proprietary blend that hides individual doses.
- Suggested use, warnings and any allergen or manufacturing statements.
If we cannot find the label on the official site or on the product itself, the review says so. A product that will not show its label before purchase is noted as a con.
Step 2: Compare label doses with studied doses
For each main ingredient, we look for human studies and note the dose those studies used. Then we put the label dose next to it. A formula can list a well-researched ingredient and still contain a fraction of the amount that was tested. When an ingredient is inside a proprietary blend, we cannot confirm the dose, and we say that plainly rather than guessing.
Step 3: Grade the evidence for each ingredient
We look up each ingredient in the NIH Office of Dietary Supplements fact sheets, the National Center for Complementary and Integrative Health, PubMed and the Cochrane Library. We give each ingredient one of four grades for the specific use the product claims. An ingredient can have strong evidence for one use and weak evidence for another.
| Grade | What it means | Typical evidence |
|---|---|---|
| Strong | Consistent benefit for this use in well-designed human research. | Several randomized controlled trials in people, or a systematic review or meta-analysis with consistent results. |
| Moderate | Some good human evidence, but with gaps. | A few randomized trials with mostly positive results, small sample sizes or short durations. |
| Limited | Early or mixed human evidence. | One or two small trials, uncontrolled studies, or results that conflict. |
| Weak | Little or no human evidence for this use. | Animal or cell studies only, traditional use, or no published research we could find. |
We grade the ingredient, not the product. Very few finished supplements have been tested as a whole formula, and when one has, we report that study separately.
Step 4: Check safety and interactions
We note known side effects, upper intake limits and common interactions listed by the NIH Office of Dietary Supplements and similar public sources. Examples include ingredients that may affect blood sugar, blood pressure, blood clotting or how certain medicines are processed. We also flag groups who are usually told to avoid an ingredient, such as people who are pregnant or nursing. This is a summary of published cautions, not a personal safety check, and every review tells readers to ask their doctor or pharmacist before starting a new supplement.
Step 5: Work out the price and cost per day
We record the listed price for one bottle and for any multi-bottle bundles, then divide by the number of days the product lasts at the suggested dose. Cost per day makes it easier to compare a product with a simpler alternative that contains the same main ingredient. We also note shipping charges and whether the price shown is a “today only” figure.
Step 6: Read the refund policy and checkout terms
Before a review goes live, we read the seller’s refund policy and walk through the checkout page up to the point of payment. We look for:
- The length of the guarantee and whether it covers opened bottles.
- Who handles refunds (the seller or a payment platform such as ClickBank) and how to contact them.
- Whether return shipping is paid by the buyer.
- Pre-checked boxes, auto-ship or subscription terms, and upsell pages after the first order.
Refund terms change, so each review shows the date we last checked them.
Step 7: Check the marketing claims
We list the main claims made on the sales page and compare each one with what the research supports. Claims that promise to cure, reverse or replace treatment for a disease get called out, because dietary supplements in the US are not allowed to make those claims. We also note when a sales page cites studies that tested a different ingredient, a different dose or animals rather than people.
Step 8: Write pros, cons and who it suits
A ProveNutra review ends with a list of pros, a list of cons, and short notes on who the product may suit and who should probably skip it. That is the verdict. We think a reader is better served by the reasons than by a single number.
What we never do
- We never show star ratings, scores or “out of 10” numbers.
- We never publish testimonials, before and after photos or review counts.
- We never change a conclusion because a product pays a commission or because a seller asks.
- We never claim to have tested a product in a lab or on ourselves unless we did, and we say how.
- We never suggest a supplement can treat, cure or prevent a disease, or replace a medicine.
Keeping reviews current
Formulas, prices and refund terms change. We recheck published reviews on a regular schedule and when a reader reports a change. Each review shows when it was last updated. If you spot something out of date, please tell us. Our editorial policy explains how corrections are handled.