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The Supplement Compass

Heads up: The Supplement Compass is reader-funded. If you buy NeuroZen through a link on this page we may earn a small commission, and your price stays exactly the same. We are not the maker of NeuroZen. See how this works.

Our method

How The Supplement Compass reviews products

We are an independent consumer publication, not a supplement brand. This page explains who we are, how we evaluate a product like NeuroZen, and exactly how we make money, so you can weigh our verdict with full context.

Reviewed by Priya Nandakumar, MS, CNSLast updated July 2026Affiliate disclosure

Who we are

The Supplement Compass is published by Compass Review Media, LLC, an independent editorial company based in Traverse City, Michigan and founded in 2019. We cover direct-to-consumer supplements, the kind sold through their own websites rather than pharmacy shelves, because those products get the least independent scrutiny and generate the most confused search queries. Our readers are typically people who have found a product they are considering and want a straight answer about whether it is worth buying before they spend money.

We are not affiliated with, endorsed by, or operated by the manufacturers of the products we cover, including NeuroZen. When we link to a manufacturer's official website, that is an affiliate link, and we explain exactly what that means below and on our affiliate disclosure page.

Who reviews the products

Reviews are led by Priya Nandakumar, MS, CNS, a Certified Nutrition Specialist who reads the label and formula, and are informed by the wider pattern of verified user feedback we gather. Credentials do not make anyone infallible, so we pair professional judgment with a transparent, repeatable scoring process rather than relying on opinion alone. Where we describe first-hand testing, we mean a genuine multi-week trial of the product used as directed, reported honestly, including what did not change.

How we score, step by step

Every product runs through the same eight criteria. Each is scored from 1 to 5, and the visible rating bars on our reviews show those scores. The criteria and their rough weightings are:

  • Effectiveness (25%) - what share of users report the benefit the product is sold for, and how consistent that pattern is.
  • Value for money (15%) - the real per-bottle cost against the typical benefit and the length of any guarantee.
  • Tolerability (15%) - the rate and severity of reported side effects.
  • Onset speed (10%) - how long people wait to notice a change.
  • Ease of use (10%) - dosing, format, and how easy it is to stay consistent.
  • Label transparency (10%) - whether ingredients and doses are disclosed.
  • Customer support and guarantee (10%) - refund terms and how smoothly they work in practice.
  • Repurchase intent (5%) - how many users say they would buy again.

The overall editorial score is a weighted blend of those criteria, sanity-checked against the community rating. We deliberately allow low scores: a product that only helps a minority, or hides its doses, loses points, and we say so plainly. A review that reads as all upside is not a review, it is an ad.

Where our user data comes from

The community rating, star distribution, themes, demographics, and time-to-results figures on our reviews are an editorial aggregation of user feedback, presented to show the shape of real-world response. They are not an externally audited dataset, and we do not claim laboratory testing of our own. The testimonials we display are illustrative of the feedback patterns we see; they are editorial content and are not drawn from the review-submission form on our site, which has no public database behind it.

How we make money (the short version)

The Supplement Compass is reader-funded through affiliate commissions. If you click a link to a manufacturer's official site and buy, we may earn a commission at no additional cost to you. That relationship never changes our scores or our willingness to publish criticism, and we only ever link to a product's official store, never a third-party marketplace. The full explanation, including our FTC obligations, is on the affiliate disclosure page.

Corrections

Prices, formulas, and guarantee terms change. If you spot something out of date or believe we have made an error, email [email protected] and we will review it. We update the "last updated" date on a review whenever we revise it.