Two claims to retire
Two claims about green tea come up often enough to be worth retiring properly.
The first is that green tea is always the lowest in caffeine.
Caffeine tracks leaf age, dose and water temperature rather than the colour of the liquor.
A bowl of matcha made from shaded young leaf can deliver more than a mild breakfast black tea.
Buds and young leaf hold more of it than the coarse leaf further down the branch.
So a green tea picked as buds and brewed hot is not a gentle drink by default.
The second claim is that green tea should be brewed with boiling water.
Water straight off the boil scalds a delicate leaf and pushes the bitterness out fast.
The usual working range for most green tea is 70 to 85 °C.
A pan fired leaf sits at the top of that range, and a steamed Japanese leaf at the bottom.
Both claims fail for the same reason, which is that they flatten a variable into a rule.
Green tea is the category with the widest spread of handling in the whole trade.
Why they persist
Both claims survive because they are short, memorable and mostly harmless to repeat.
A rule that fits in one sentence travels much further than a qualified statement ever will.
Greener means lighter is easy to say, and the list of variables behind it is not.
Shops repeat these lines because customers ask for one number rather than for a range.
Labels repeat them because a hard claim sells better than an honest one does.
Teachers repeat them because they were taught the same way, and nobody checks.
There is also a grain of truth inside each one, which is what makes them durable.
Young leaf really is used for a great many green teas, and hot water really does extract faster.
The error sits in the word always, and that word is the first thing dropped in the retelling.
A claim with a true centre is far harder to dislodge than an outright invention.
The fix is boring and effective: look at how the tea was made and how it is brewed.
Two questions replace the rule, and they work on every category rather than just this one.
How to check any claim
Any hard rule about green tea can be tested by asking what variable it leaves out.
False claims work by reducing a leaf to one number, one colour or one step.
Real behaviour is multivariate, and the variables are not in the least mysterious.
Cultivar sets the base chemistry of the leaf before anybody picks it.
Processing decides how much of that chemistry survives into the dry leaf.
Water temperature and time decide what actually reaches the cup.
Dose decides the rest, since 3 g and 5 g of the same leaf are different drinks.
A rule that mentions only one of those is incomplete rather than wrong.
Test it by changing one variable at a time and holding the other three fixed.
Brew the same leaf at 75 °C and then at 90 °C, and the difference arrives immediately.
That experiment costs a few minutes and settles arguments that otherwise last for years.
Anyone unwilling to run it is defending a slogan rather than describing a tea.
The honest baseline
None of this makes green tea mysterious, and that is the point worth holding on to.
It means the accurate statements are qualified rather than absolute.
Most green tea does well between 75 and 85 °C, and there are exceptions on both sides.
Caffeine is usually lower than in a strong black tea, and matcha does not follow that pattern.
Those two sentences are less satisfying than the myths and considerably more useful.
A qualified claim gives you something to adjust, which is exactly what a brewer needs.
An absolute claim gives you a rule that will be wrong on the next leaf you open.
The practical baseline is simple enough to remember while standing in a shop.
Buy a bud tea for sweetness and an older leaf style for body, and expect different water for each.
Ask the seller which temperature they use, and judge the shop by the answer you get.
Brew 3 g in 150 ml, start at 80 °C, and move the temperature before changing anything else.
That one habit replaces most of the rules people repeat about this category.