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The Journal

Tag

#caffeine

All things caffeine: dosage, half-life, sources, and side effects.

Does Coffee Help a Hangover? What Caffeine Does (and Doesn't) Fix the Morning After
Focus

Does Coffee Help a Hangover? What Caffeine Does (and Doesn't) Fix the Morning After

Does coffee help a hangover? What caffeine actually fixes, what it does not, and what the one real human trial on this found.

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Roon Team
September 3, 2026·9 min read
#caffeine#coffee
Caffeine Withdrawal Timeline: Hour by Hour From Your Last Cup
Science

Caffeine Withdrawal Timeline: Hour by Hour From Your Last Cup

The real caffeine withdrawal timeline: onset at 12-24 hours, peak at 20-51 hours, and how long symptoms actually last, based on clinical research.

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Roon Team
September 3, 2026·9 min read
#caffeine
Caffeine Before Fasted Cardio: Does It Break the Fast and Does It Burn More Fat?
Science

Caffeine Before Fasted Cardio: Does It Break the Fast and Does It Burn More Fat?

The viral 44 percent more fat claim is not well supported. Here is what real fat-oxidation studies show about caffeine before a fasted workout.

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Roon Team
September 3, 2026·8 min read
#caffeine
Best Energy Drink to Stay Awake: Ranked by Caffeine per Ounce, Crash Risk, and Duration
Focus

Best Energy Drink to Stay Awake: Ranked by Caffeine per Ounce, Crash Risk, and Duration

Ranked by verified mg per can and per ounce: Bang, Reign, Celsius, Monster, Red Bull, and more, plus crash risk and how long each one lasts.

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Roon Team
September 2, 2026·12 min read
#caffeine
Can You Drink Coffee on the Carnivore Diet? What Strict Carnivores Do About Caffeine
Wellness

Can You Drink Coffee on the Carnivore Diet? What Strict Carnivores Do About Caffeine

Coffee is not strictly carnivore by the diet's own logic, yet most carnivore dieters drink it anyway. See where Baker, Saladino, and the Lion Diet stand.

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Roon Team
September 2, 2026·8 min read
#coffee#caffeine
Do Caffeine Patches Work? Absorption, Onset, Duration, and 5 Brands Tested
Alternatives

Do Caffeine Patches Work? Absorption, Onset, Duration, and 5 Brands Tested

Do caffeine patches work? Real per-patch mg from 5 brands, what transdermal caffeine research actually shows, and why the evidence is still thin.

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Roon Team
September 1, 2026·10 min read
#caffeine
Does Caffeine Make Period Cramps Worse? What 14 Years of Nurses' Health Study Data Say
Wellness

Does Caffeine Make Period Cramps Worse? What 14 Years of Nurses' Health Study Data Say

Coffee and soda are not the same story. Here is what 14 years of Nurses Health Study data and separate dysmenorrhea studies actually found.

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Roon Team
September 1, 2026·9 min read
#caffeine
Caffeine Crash Symptoms: What They Feel Like, How Long They Last, and Why They Hit at 2 PM
Science

Caffeine Crash Symptoms: What They Feel Like, How Long They Last, and Why They Hit at 2 PM

What a caffeine crash actually feels like, how long it lasts, why it hits mid-afternoon, and how it differs from a sugar crash, explained with real data.

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Roon Team
August 31, 2026·9 min read
#caffeine#energy
Caffeine Gum Explained: How It Works, How Fast It Hits, Which Brands Are Worth It
Alternatives

Caffeine Gum Explained: How It Works, How Fast It Hits, Which Brands Are Worth It

How caffeine gum is absorbed, how fast it hits versus coffee and pills, and which brands like Neuro Gum, Run Gum, and Rev are worth chewing.

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Roon Team
August 30, 2026·9 min read
#caffeine#gum
Stay Awake Pills: What Is Actually in Them, Do They Work, and How Many Is Too Many
Focus

Stay Awake Pills: What Is Actually in Them, Do They Work, and How Many Is Too Many

Stay awake pills are FDA-regulated 200 mg caffeine tablets. Here is the exact label dosage, warnings, and how Roon's 80 mg pouch compares.

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Roon Team
August 30, 2026·8 min read
#caffeine
Does Caffeine Raise Blood Sugar? The Acute vs. Habitual Paradox, Explained
Science

Does Caffeine Raise Blood Sugar? The Acute vs. Habitual Paradox, Explained

Caffeine spikes blood sugar acutely in lab studies, yet habitual coffee drinkers have lower diabetes risk. Here is how both findings can be true.

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Roon Team
August 29, 2026·9 min read
#caffeine
Fasting Headache: Why It Happens and How to Stop It Without Breaking Your Fast
Wellness

Fasting Headache: Why It Happens and How to Stop It Without Breaking Your Fast

A fasting headache usually traces to caffeine withdrawal, low blood sugar, or sodium loss. See the real causes and what actually helps without eating.

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Roon Team
August 29, 2026·10 min read
#caffeine
How to Get Rid of Caffeine Jitters Fast: What Actually Works in the Next 30 Minutes
Science

How to Get Rid of Caffeine Jitters Fast: What Actually Works in the Next 30 Minutes

What actually calms caffeine jitters in the next 30 minutes, what the evidence supports, and what to try next time to avoid them.

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Roon Team
August 29, 2026·10 min read
#caffeine
Caffeine Gummies and Energy Chews: How They Work, Onset Time, and 8 Brands Compared
Alternatives

Caffeine Gummies and Energy Chews: How They Work, Onset Time, and 8 Brands Compared

How caffeine gummies and energy chews work, real onset time, and 8 brands compared by mg, sugar, and price so you know what you're actually chewing.

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Roon Team
August 28, 2026·10 min read
#caffeine
Does Caffeine Help You Lose Weight? What 40 Years of Trials Actually Show
Science

Does Caffeine Help You Lose Weight? What 40 Years of Trials Actually Show

Caffeine measurably raises energy expenditure in lab studies, but the effect is small and fades with tolerance. Here is what four decades of trials show.

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Roon Team
August 28, 2026·9 min read
#caffeine
Does Caffeine Cause Bloating? Separating the Caffeine From the Coffee Acids, Milk, and Sweeteners
Science

Does Caffeine Cause Bloating? Separating the Caffeine From the Coffee Acids, Milk, and Sweeteners

Decaf coffee bloats people too, which points to coffee's acids and gut effects, not caffeine. Here is what the digestion research actually shows.

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Roon Team
August 27, 2026·7 min read
#caffeine
How to Take a Caffeine Nap: The 20-Minute Protocol (and Why a Pouch Changes the Math)
Science

How to Take a Caffeine Nap: The 20-Minute Protocol (and Why a Pouch Changes the Math)

The caffeine nap protocol backed by real research: how much caffeine, how long to nap, and why 20 minutes is the number that actually works.

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Roon Team
August 26, 2026·8 min read
#caffeine#sleep
Best Caffeine Pills and Supplements 2026, Ranked by Format
Alternatives

Best Caffeine Pills and Supplements 2026, Ranked by Format

The best caffeine pills and supplements by format and dose, from 200mg tablets to stacked capsules, gum, and pouches, with real mg and price per dose.

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Roon Team
August 26, 2026·9 min read
#caffeine#supplements
Why Does Caffeine Make You Hungry? Blood Sugar, Cortisol, and the Rebound Effect
Science

Why Does Caffeine Make You Hungry? Blood Sugar, Cortisol, and the Rebound Effect

Caffeine rarely spikes hunger on its own. See what research says about blood sugar, cortisol, and coffee additives behind post-coffee hunger.

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Roon Team
August 25, 2026·8 min read
#caffeine
TeaCrine vs Creatine: Two Completely Different Supplements
Nootropics

TeaCrine vs Creatine: Two Completely Different Supplements

TeaCrine and creatine are unrelated compounds. Here is what each one is, what each is actually for, and why the names get confused.

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Roon Team
August 19, 2026·12 min read
#theacrine (teacrine®)#caffeine#energy
Why Dynamine Feels Like Nothing: 5 Reasons You Felt No Effect
Nootropics

Why Dynamine Feels Like Nothing: 5 Reasons You Felt No Effect

Took Dynamine and felt nothing? Five measurable reasons it happens, from caffeine tolerance to a half-life shorter than most people expect.

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Roon Team
August 19, 2026·11 min read
#methylliberine (dynamine®)#caffeine#energy
Dynamine and Caffeine Together: What the Research Actually Found
Nootropics

Dynamine and Caffeine Together: What the Research Actually Found

What happens when you take Dynamine and caffeine together, including the measured effect on caffeine clearance and what it means for timing.

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Roon Team
August 18, 2026·11 min read
#theacrine (teacrine®)#methylliberine (dynamine®)#caffeine
Dynamine vs Caffeine: Onset, Duration, and What the Studies Show
Nootropics

Dynamine vs Caffeine: Onset, Duration, and What the Studies Show

How Dynamine (methylliberine) differs from caffeine: measured onset, a half-life roughly four times shorter, and what the trials found.

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Roon Team
August 18, 2026·11 min read
#methylliberine (dynamine®)#caffeine#energy
What Is Theacrine? The TeaCrine Ingredient, Explained
Nootropics

What Is Theacrine? The TeaCrine Ingredient, Explained

Theacrine, sold as TeaCrine, explained: what it is, where it comes from, how long it lasts, and what the human studies actually show.

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Roon Team
August 18, 2026·13 min read
#theacrine (teacrine®)#caffeine#energy