Vol. 1 · Evidence-led coffee education · Est. 2026
Understand coffee, one study at a time.
Coffee Studies is an evidence-led education project covering caffeine, brewing science, beans and origins, instant and decaf coffee, coffee alternatives, and functional coffee. Plain-English answers, every factual claim backed by a citation you can check.
Topics
Explore coffee by subject
Caffeine & Health
What research says about coffee and your body
02Brewing Science
Extraction, ratios, temperature, and grind
03Brew Methods
Every way to make coffee, explained
04Espresso & Coffee Drinks
The coffee drink encyclopedia
05Beans, Roasts & Origins
From plant to roasted bean
06Instant & Decaf Coffee
How soluble and decaffeinated coffee are really made
07Coffee Alternatives
Chicory, matcha, mate, and beyond
08Mushroom Coffee
The species, the science, and who actually makes it
09Functional Coffee
Butter, keto, collagen and protein coffee
10Coffee Business
What it actually costs and takes to open a coffee business
11Barista Skills
Technique, training, and careers behind the bar
12Coffee Equipment
What the gear does, and which part of it matters
Start here
Most-asked coffee questions
Caffeine & Health
Is Coffee Healthy? What Large Studies Actually Show
Caffeine & Health
How Much Caffeine Is in Coffee? By Drink and Cup Size
Caffeine & Health
Coffee and Sleep: What Research Shows
Brewing Science
Coffee-to-Water Ratio Explained
Brewing Science
Coffee Grind Size Guide: Which Grind for Which Method
Brew Methods
Pour-Over Coffee Guide: Ratios, Bloom, and Technique
Brew Methods
How Long Should Cold Brew Steep? What the Lab Data Says
Beans, Roasts & Origins
Arabica vs Robusta: Taste, Caffeine, and Differences
Espresso & Coffee Drinks
What Is Espresso? Pressure, Extraction, the Shot
Latest articles
6 of 244
Recent research and explainers
- Coffee Business
Cost to Open a Coffee Shop, Priced Line by Line
The $80,000 to $300,000 range everyone quotes comes from one publisher that contradicts itself. Here is every line, priced from retailers and fee schedules.
- Coffee Business
Coffee Shop Business Plan: What Lenders Actually Read
The structure is settled, and not by the template sites. Here are the eight sections the SBA publishes, the one it leaves out, and a skeleton to download.
- Beans, Roasts & Origins
The 15-15-15 Coffee Rule: Who Made It Up, and When
A coffee freshness mnemonic from a 2008 home-barista forum post, not an industry standard. The original had four numbers, and two versions now disagree.
- Barista Skills
Barista Skills: The Full List and How to Show Them
Every skill a barista needs, from the job ads and the body that certifies the training: the full list, who asks for each, and how to put it on a resume.
- Functional Coffee
What Is Functional Coffee? Ingredients, Claims and the Rules
Functional coffee is coffee with a mushroom extract, protein, collagen, fat or herb added. What the labels claim, what the evidence says, what the rules allow.
- Coffee Alternatives
Black Tea vs Coffee: Caffeine, and Why the Leaf Loses
Dry black tea is richer in caffeine than a roasted coffee bean, yet a cup of coffee has twice as much. The dose explains it, and the published figures disagree.
How we work
Editorial standards
Coffee Studies is published by Nature Lion Inc., the Canadian company behind Shyne Coffee. Editorial content is written to be useful on its own: cautious language, citations to research and official data, and a clear line between what studies show and what they do not. Sponsored placements are always labelled.
Read our editorial approach →