How We Choose Information

Guides explain a specific question, show how the answer applies, and identify the sources and limits that matter to a reader.

Sources should fit the question

A device question needs the manufacturer’s instructions. A product-use question starts with the current label. Formula and shipping questions may also need supplier documents, applicable standards, or carrier rules. General information cannot replace a document for the actual product or situation.

What a source can support

Source notes distinguish a finding from the broader claims it does not establish. A laboratory result is not automatically a result in people; one ingredient’s information does not approve an entire finished product. Marketing, testimonials, and social posts are not proof of a health benefit or universal safety.

If information is incomplete or conflicting, the question should stay visible. The reader may need the manufacturer, an appropriate professional, or a more specific document to resolve it.

Examples and worksheets

Worked examples are labeled as illustrations where they use fictional products, people, or numbers. Worksheets help with arithmetic, comparisons, or notes. Completing one does not establish safety, efficacy, certification, or legal compliance.

Who reviews the material

Marc LaClear is responsible for the site’s published wording and corrections. No medical, veterinary, legal, fire-safety, or product-safety review is claimed unless a page names an actual qualified reviewer and what they reviewed. Read the publisher profile and AI and technology disclosure.

Dates and corrections

A source-check date describes when the named reference was checked. A publication date describes the page. Neither guarantees that product instructions or rules have stayed the same. Check the current document before relying on it.

Report an error with the page URL, exact wording, and a relevant reference through the contact page. The corrections page explains what to include.