Frequently asked questions

No. Every topic, document, tag and profile is readable without one. An account is only needed to post, and reading has never been gated here.

Automatic permission tiers earned by reading and participating — TL0 to TL4. The trust levels page lists exactly what each unlocks and how it is reached. They are plumbing, not status; there is deliberately no leaderboard.

A reply has been marked as the solution, either by the person who asked or by staff. The topic header links straight to it. 452 topics are solved. Solved topics are also marked up as Q&A pages so search engines and answer engines can read the answer directly.

A post any sufficiently trusted member can edit, used where an answer needs to stay current rather than frozen at the moment it was written. It shows an edit history strip and who last changed it. 139 topics contain one.

A topic is a conversation. A document is what a good conversation becomes: extracted, structured, given named maintainers and a review date, and linked back to the topic it came from. 68 of 68 documents started as a topic.

Because a link posted mid-thread is not a route anybody can check, and policing "just this one" case by case does not work. The vendor pages do link each supplier's storefront, marked nofollow and sponsored, precisely so the link sits next to the verification record rather than in a reply. Beyond that, and policing "just this one" case by case does not work. Suppliers are discussed by name in sourcing, and the vendor pages record what has been independently verified. The vendor pages themselves link each storefront, marked nofollow and sponsored.

An independent third-party result — Janoshik, Medutest, PeptideMeter or VendorInvestigate — with the method, the lot number and the date. A supplier's own certificate is not independent; it can be posted, but it will be labelled as what it is. A number in a screenshot with no report behind it is not evidence.

The hidden post says which rule and who acted, and the same action appears in the public log with a written rationale. If you think it was wrong, say so in meta — publicly, once. Decisions get reversed there and the reversal is logged too.

Almost never. Rule-breaking posts are hidden with a note and the topic stays readable. Whole topics go only for unlawful content or personal information. Closing a topic is not deletion — it stays up, permanently linkable.

No. The site carries a few labelled sponsor placements which buy placement and nothing else — see funding. Members and suppliers cannot buy posts, solutions, documents or vendor entries at any price, and asking gets the request posted in meta.

No, and it cannot be. Everything here is what members think and what happened to them. Nobody has examined you. Several compounds discussed are sold for research use only and are not approved for human use. Read the disclaimer.

Groups are self-declared or invited and are visible on your profile. They say something about your background and confer no authority — the guidelines still require the argument.

Because a downvote is a way of disagreeing without saying anything, and this site would rather you said something. Posts have likes, solutions and flags: appreciation, correctness, and rule-breaking. Disagreement is a reply.

Search filters by category, tag, status and date. Solved-only is the highest-signal filter on the site. Use the site's own vocabulary — reconstitution rather than "mixing", lot rather than "batch number".