A directory is not the whole market
Yopepi compares sources it has discovered and can read reliably. Some sources are listed without a price connection. Failed and archived sources are omitted from public results while retained observations remain available for owner review. Coverage changes over time and is not guaranteed to include every Australian or US supplier. Directory inclusion is not endorsement.
Read the offer observation, not just the refresh schedule
Each displayed offer has its own observed timestamp. A supplier’s last check attempt can be newer than a successful product observation. A failed or partial check must not turn an old observation into a fresh price. The daily refresh schedule is an intention, not a promise that every source succeeds on every run.
Missing does not mean unavailable
A disabled size means Yopepi has no eligible listed offer at that size under the current filters. It does not prove that no supplier sells it. “Not confirmed” stock status means the source supplied no reliable stock signal; it is not confirmation of availability. Recheck the source before procurement.
Compare the final total for the same quantity
Displayed AUD or USD prices exclude shipping and checkout taxes or fees. Membership pricing, minimum order conditions and discount codes can change the total. Do not compare a whole kit price with a single-vial price or assume a larger pack saves money overall. Use the same destination and quantity when comparing delivered totals.
Treat discrepancies as reviewable reports
If the source differs from Yopepi, note the URL, variant, nominal mass and current listed price, then report the issue. Include the observation time if possible. Reports are reviewed before a correction; a public submission never overwrites a price automatically.
Related information
All comparison guides · Calculate price per mg · Comparison methodology · Report a catalogue issue
External references: TGA peptide regulation · NIST: measurement science. These explain broader regulatory and measurement context; they do not validate any supplier listing.