Last updated: July 14, 2026
These are the rules every guide on Synapsis Coffee is written against. They exist so you can tell what has been measured, what has been read, and what is opinion.
Measurement before publication
A brewing guide does not go live without the parameters that produced it: water temperature in Celsius, grind size with the grinder model it came from, dose and yield by weight, contact time, and where relevant, pressure. A recommendation with no numbers behind it is an anecdote, and anecdotes stay out of the guides.
Naming the equipment
Grind settings are meaningless in the abstract. A setting of 12 on one grinder is not a setting of 12 on another. Every guide names the grinder, kettle, and brewer used for the test, so you can translate the result to your own gear rather than guess at it.
Research versus kitchen
Two kinds of claims appear on this site, and they are kept visibly apart. Claims about coffee chemistry and caffeine metabolism are sourced from published research and cited. Claims about how something tastes or how a technique behaves are from testing in the Portland lab, and they are written in the first person so their status is obvious.
Health content
Caffeine and cognition content describes what the literature reports about populations. It is not personal medical advice, it does not diagnose, and it does not replace a conversation with a clinician. Where individual variation is large, as it is with caffeine metabolism, the guide says so instead of offering a single number as if it applied to everyone.
Independence
No brand pays for a review, a placement, or a rating on this site. Affiliate links may earn a commission, and that never changes a verdict. See the affiliate disclosure for how that works.
Corrections
If a number here does not reproduce, that is a defect and it gets fixed. Send the details through the contact form: your equipment, your measurements, and what you got. Substantive corrections are made in the guide itself, and the update date changes with them.