Blog
How caffeine gets taken, why a pouch, and what we learn while building Ne9. Written as we find things out.
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Caffeine: pregnancy, breastfeeding, children and medication
Daily caffeine guidance for pregnancy, breastfeeding, children, sensitive people and those on medication, taken directly from the public authorities that publish it. Japan sets no limit of its own, which is why the figures differ between authorities.
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Where to buy caffeine pouches in Japan
Official caffeine pouch sites checked for buyers in Japan, and Ne9 launch plans. Ne9 is preparing for domestic food sales and currently accepts launch-update registrations only.
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How to store and dispose of caffeine pouches
What to do with a caffeine pouch after use, how to carry one, and how to store an opened can. Whether used pouches go in burnable waste, how the lid compartment works, and what to watch for in homes with children or pets.
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How to choose a caffeine pouch: six checks on the label
Six points to compare when choosing a caffeine pouch — serving size, category (food or medicine), daily guideline, what else is in it, price per serving, and the ingredient list. Plus how to avoid confusing it with similar-looking products.
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Caffeine pouches: 150mg or 200mg per serving?
Caffeine pouches come in 150mg and 200mg per pouch. Using the EFSA guidelines of up to 200mg in a single serving and 400mg a day, here is how to choose a serving size — by working back from your daily total rather than picking the larger number.
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What is L-theanine? An amino acid found in tea leaves
L-theanine is an amino acid found in green tea, present in the same leaves as caffeine. Where the name comes from, its relationship to umami, why "how many mg in a cup of tea" cannot be read off official composition tables, and how much is in Ne9.
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Caffeine pouch vs energy drink: amount, sugar, container
A caffeine pouch and an energy drink compared on caffeine per serving, sugar, liquid volume, container and how each is used. Why energy drink labels are harder to read, and what to check when using both.
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Caffeine pouch vs coffee: amount, use and portability
A caffeine pouch and a cup of coffee compared on caffeine amount, liquid volume, how they are used, portability and taste. Ne9 holds 150mg per pouch. Not a ranking — a look at the differences you can read off the label.
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Caffeine pouch vs caffeine tablets: food or medicine?
Caffeine pouches and caffeine tablets can contain similar amounts, but they belong to different categories. One is a food, the other is often a medicine with approved indications and dosage. What that difference means when you choose.
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Caffeine pouches in Japan: food or medicine?
How caffeine pouches are positioned in Japan. What makes something a food rather than a medicine, and which items on the label are worth checking before you buy, based on public guidance.
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What is a caffeine pouch? How it is used and how to choose
A caffeine pouch is a single-serve pouch of powder sealed in non-woven fabric. You hold it in your mouth — no water, no equipment. Here is how it is used, how to read the caffeine figure, what to check when choosing one, and how it is classified in Japan.
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How much caffeine per day? Coffee and energy drinks compared
The daily guideline for caffeine is around 400mg for a healthy adult. Here is what that looks like next to a cup of coffee, green tea and an energy drink, plus what happens when you go over it.
