How to compare products you have not tried

Decide what you can actually compare

You can compare two products without consuming either of them. A label can tell you about stated ingredients, package size or serving information; a published report can answer a particular analytical question. Those are useful sources. They cannot tell you whether you will like a flavor or how a preparation will feel to you.

Start by naming the comparison’s basis. “A comparison of published label information” makes a different promise from “We tried both.” A photograph of a product beside a glass does not turn the first into the second. Describe the work that was actually done. That gives readers a fair way to judge the observations that follow.

FTC endorsement guidance explains that endorsements must reflect honest opinions and experience and that material relationships may need disclosure. Its principles are relevant when a comparison becomes a recommendation or includes commercial links. They do not establish that a label comparison requires anyone to use a product, or excuse unsupported claims because a writer calls the piece a review. FTC: endorsements and relationships

Say what the comparison is based on.

Put the same details beside each other

Choose a small set of fields that answer the reader’s question: the identified product version, stated contents, unit basis, price and available evidence. A table becomes less useful when one row uses the bottle total, another uses one serving and a third uses an unclear marketing number. Normalize the basis before drawing a comparison.

For a fictional example, one drink could state its contents per can while another states them per smaller serving. You would need the serving count to compare container totals. If that information is unavailable, leave the cell unresolved. Filling it with a guess makes the table look complete while weakening the comparison.

Price needs the same care. A subscription offer, introductory discount and ordinary one-time purchase are different terms. Our guide to comparing product prices shows how to make the arithmetic visible. A lower price per unit of an ingredient does not establish better value for a person or a reason to consume more of it.

Record when you checked an online price and whether delivery was included. If the other product’s final delivery cost is unknown, show the product prices separately rather than presenting an invented checkout total. The comparison can be accurate about the information available while leaving that part unfinished.

Separate the maker’s statements from outside evidence

A manufacturer’s page is a primary source for what that manufacturer says. Attribute it accordingly. If the page says the product contains a particular ingredient or uses a certain process, you can report that statement. Calling it independently verified requires evidence beyond the fact that you read it on the brand’s website.

A batch report adds another source with its own scope. Check the sample identity, batch, laboratory, dates and tests before treating it as relevant to the product under discussion. A report for another format or lot does not automatically apply. The process in reading a batch test report helps distinguish these details.

Health claims need a further check. FTC guidance examines the relevance and quality of supporting evidence, not just whether a citation is present. An ingredient paper, customer testimonial and trial of the finished product provide different kinds of support. List what the source actually examined before comparing the claims printed around it. FTC: health-product evidence guidance

Leave experience-shaped questions open

Flavor, texture and convenience can involve firsthand observation. If no one tasted or handled the product, say only what the available material supports. A description such as “the maker lists grapefruit flavor” is different from “bright, fresh grapefruit with a clean finish.” The second sounds like an experience, even when a writer constructed it from a product page.

The same restraint applies to effects. A label cannot establish a personal onset time, a good night’s sleep or a predictable mood. Nor can a test report establish those experiences just because it records an ingredient. NIH ODS distinguishes questions of quality from effectiveness and personal safety in its supplement guidance. NIH ODS: dietary supplement labels and quality

An absent test is not a poor test result. If a report cannot be located, explain that it was unavailable during the comparison rather than saying the product failed testing. If a full research paper is inaccessible, identify the abstract-only limit. These distinctions prevent gaps in your research from becoming unfair claims about a company. NCCIH: abstracts and main sections

Give a useful result without a forced winner

Sometimes the comparison reveals a trade-off: one product provides a clearer ingredient breakdown while another provides a more accessible batch report. That is a worthwhile finding. You can explain which question each source answers without inventing a single score that turns unlike information into an overall ranking.

The comparison can show how serving sizes differ, which price terms apply and which information remains unverified. Calling one product best is a further claim that needs its own stated basis.