Author
Mei Tanaka
Mei covers science and gear. A former lab technician turned barista, she tests equipment and reads the studies so readers do not have to.
Stories by Mei Tanaka
Gear
Flat vs conical burrs: what the difference means for your cup
Two shapes, two styles of grind. We explain how each works and which suits the way you brew.
Science
How much caffeine is too much? What regulators say
European and US health bodies give similar limits. Here is what they mean in cups, and who should drink less.
Gear
Recipe: a simple Chemex for two
Thirty grams of coffee, 500 grams of water and four minutes. A clear, sweet cup with no tricks.
Science
Does coffee dehydrate you? The evidence says mostly no
Caffeine is a mild diuretic, but a cup of coffee is still mostly water. Regular drinkers adapt.
Gear
Espresso machine boilers explained: single, dual and heat exchange
The boiler decides how fast you can brew and steam. Here is how each type works and who needs it.
Science
Why your coffee tastes different as it cools
The first sip and the last sip are different drinks. Temperature changes what your tongue can sense.