The adenosine problem

A full day of class, and
nothing left for the studying.

It's not laziness. It's adenosine. It builds up every hour you're awake, and your coffee was before noon. THNK is 200mg of caffeine to block it, taken when you sit down to study. 20 servings per tub · just $1.50 per serving · 100 day money back guarantee.

Shop THNK Focus $29.95
THNK lifestyle
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My brain is working with me instead of against me.
Ashly T. · Law student
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Take it when you sit down to study
200mg caffeine per serving
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Built for the end of the day
THNK lifestyle
Out of class, 4:10pm
THNK lifestyle
Sitting down to study
THNK lifestyle
Brand new shipment
The problem

It's not laziness.
It's adenosine.

Adenosine builds up in your brain every hour you're awake. By the time class ends, there's a full day of it telling your brain to turn off. That's why the studying runs out after class.

01
It starts building when you wake up
Every hour you're awake, a little more adenosine piles up in your brain. It's part of how your body keeps track of how long you've been up.
02
Your coffee was before noon
Your body clears about half the caffeine in a cup in around five hours. By dinner, the coffee is mostly gone and the adenosine is still building.
03
By the time class ends, it's a full day of it
That's why you come home too tired to study, even after a full night of sleep, and even when you actually want to do the work.
04
THNK blocks it when you sit down
200mg of caffeine keeps adenosine off the receptors that make you feel tired for a few hours. Take it when you sit down to study, not at breakfast.
12k+
customers who found their baseline again
4.9
average star rating across 12,319 reviews
40m
average time to feel the first effects
94%
of customers say they'd recommend THNK
THNK
After class study session
Who it's for

For students who come home from class
too tired to do the work that's due.

You made it through a full day of class. You made it to the desk. You actually want to do the work. But by the time you sit down, your brain has been collecting adenosine since you woke up.

Coffee before noon, nothing left after dinner
Too tired to study, even after a full night of sleep
The work that's due is still sitting there at 7pm
You want the second half of the day to be worth something
What's inside

Every amount,
printed on the label.

200mg of caffeine does the adenosine work. Everything else in the tub is listed here at its real dose, so you know exactly what you're taking.

Make the second half of the day
worth something.

200mg of caffeine, taken when you sit down to study. 20 servings per tub · just $1.50 per serving · 100 day money back guarantee.

Shop THNK Focus $29.95 →
100 day guarantee
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Common questions

Everything youwant to know.

How quickly will I feel THNK working?↓
Caffeine usually starts working within 30 to 60 minutes. That's why the rule is to take it when you sit down to study, so it's working while you work.
Can I take THNK if I'm currently on medication?↓
Talk to your doctor or pharmacist first. THNK has 200mg of caffeine per serving, and caffeine can interact with some medications.
What does the 100 day guarantee cover?↓
If THNK doesn't work for you for any reason within 100 days of your purchase, we'll refund your order in full. That's long enough to cover a full semester. Just email us and we'll take care of it.
Is there caffeine in THNK?↓
Yes. Every serving has 200mg of natural caffeine from green tea. It's the ingredient that blocks adenosine. Count it with any coffee, soda, or energy drinks you have that day. The FDA cites 400mg a day as an amount not generally linked to dangerous effects in healthy adults.
How do I take THNK?↓
Mix 2 scoops with 16 fl oz of water when you sit down to study, not at breakfast. Keep it at least six hours before bed.
Will it keep me up at night?↓
It can if you take it too late. Adenosine is part of what helps you fall asleep, so blocking it at night works against your sleep. Six hours before bed is the line.