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The Journal

Tag

#caffeine

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

Coffee and AFib: What the DECAF and CRAVE Trials Found
Science

Coffee and AFib: What the DECAF and CRAVE Trials Found

In the DECAF trial, AFib came back in 47% of daily coffee drinkers vs 64% of abstainers. What that and CRAVE mean, and what to ask your cardiologist.

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Roon Team
October 12, 2026·9 min read
#coffee+2
Coffee Benefits and Caffeine: Which Ones Caffeine Explains
Science

Coffee Benefits and Caffeine: Which Ones Caffeine Explains

Decaf matches regular coffee for liver, diabetes and mortality links, but not dementia. A study-by-study scorecard of which coffee benefits are caffeine.

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Roon Team
October 12, 2026·10 min read
#coffee#caffeine+2
Does Tea Break a Fast? Green, Black, Matcha and Herbal
Wellness

Does Tea Break a Fast? Green, Black, Matcha and Herbal

Plain tea has about 2 calories a cup and does not break a fast. Milk, honey and bottled sweet teas do. Cup-by-cup table with labels checked Oct 2026.

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Roon Team
October 11, 2026·8 min read
+2
Everyday Dose Review: The Label, Caffeine and Real Cost
Energy

Everyday Dose Review: The Label, Caffeine and Real Cost

Everyday Dose Coffee+ has 45 or 90 mg caffeine and a 7.3 g blend with no per-ingredient doses. What the label shows, what it costs after the promo.

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Roon Team
October 11, 2026·9 min read
#caffeine+3
Ultra Patches: Does Ultra Actually Sell a Patch?
Alternatives

Ultra Patches: Does Ultra Actually Sell a Patch?

Ultra sells no patches, only Focus, Energy and Sleep pouches. What you probably saw instead, and what the evidence says about patches versus pouches.

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Roon Team
October 10, 2026·8 min read
+2
GamerSupps vs G Fuel: Caffeine, Price and Label Compared
Energy

GamerSupps vs G Fuel: Caffeine, Price and Label Compared

GamerSupps is 100 mg caffeine at $0.40 a serving; G Fuel is 140 mg at about $0.90 to $0.97. Label detail, sweeteners and who each one suits.

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Roon Team
October 7, 2026·10 min read
+2
GamerSupps Alternatives: 6 Energy Options for Gamers
Alternatives

GamerSupps Alternatives: 6 Energy Options for Gamers

GamerSupps GG is 100 mg caffeine for $0.40 a serving. Six alternatives compared on caffeine, price per serving, label detail and no-mix options.

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Roon Team
October 6, 2026·10 min read
+2
Vyvanse and Caffeine: What the FDA Label and Studies Say
Science

Vyvanse and Caffeine: What the FDA Label and Studies Say

Vyvanse and caffeine are both stimulants. What the FDA label says, what one study measured, which effects overlap, and what to ask your prescriber.

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Roon Team
October 4, 2026·10 min read
#caffeine#adhd+2
Creatine in Coffee: Can You Mix Them? Heat and Caffeine
Science

Creatine in Coffee: Can You Mix Them? Heat and Caffeine

Yes, you can put creatine in coffee. Heat will not ruin it in the time it takes to drink a cup. What the caffeine studies found, and how to mix it.

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Roon Team
October 4, 2026·10 min read
#coffee#caffeine+2
Can You Drink Coffee After Wisdom Teeth Removal?
Wellness

Can You Drink Coffee After Wisdom Teeth Removal?

Skip hot and caffeinated drinks for the first 24 hours after wisdom teeth removal, and straws for a week. Here is the day-by-day plan for coffee.

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Roon Team
October 2, 2026·10 min read
#coffee+2
Creatine Before Bed: Does It Keep You Awake?
Science

Creatine Before Bed: Does It Keep You Awake?

Creatine is not a stimulant and no human trial shows it harming sleep. See what the studies found and why caffeine in the same scoop is the usual culprit.

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Roon Team
September 29, 2026·8 min read
#sleep+2
Is Monster Bad for You? What Is in the Can
Energy

Is Monster Bad for You? What Is in the Can

One 16 oz Monster has 160 mg caffeine and 54 g added sugar, 108% of the daily value. Here is each ingredient against FDA and AHA limits.

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Roon Team
September 28, 2026·10 min read
#caffeine+2
Cold Brew Ratio: Coffee to Water for Any Batch Size
Energy

Cold Brew Ratio: Coffee to Water for Any Batch Size

The cold brew ratio is 1:4 to 1:5 by weight for concentrate and 1:8 for ready to drink. Batch table in grams, ounces and cups, plus maker manuals.

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Roon Team
September 28, 2026·10 min read
#coffee+2
Is Red Bull Bad for You? Every Ingredient, Checked
Energy

Is Red Bull Bad for You? Every Ingredient, Checked

One 8.4 oz Red Bull has 80 mg caffeine and 27 g sugar. See each ingredient measured against FDA and AHA limits, plus who should skip it.

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Roon Team
September 25, 2026·10 min read
#caffeine+2
Zyn and Energy Drinks: What the Combo Actually Does
Energy

Zyn and Energy Drinks: What the Combo Actually Does

Zyn and Celsius is a TikTok favorite stack. Here's what nicotine plus 200 mg of caffeine does to your heart rate, and who should skip it.

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Roon Team
September 11, 2026·10 min read
#zyn#caffeine+1
Mounjaro and Coffee: Why Caffeine Hits Harder on Tirzepatide (Zepbound Too)
Wellness

Mounjaro and Coffee: Why Caffeine Hits Harder on Tirzepatide (Zepbound Too)

Tirzepatide delays gastric emptying, which can change how caffeine feels at first. Here's the labeled mechanism behind Mounjaro and coffee.

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Roon Team
September 7, 2026·8 min read
#coffee#caffeine
Do Nootropic Pouches Actually Work? The Evidence
Nootropics

Do Nootropic Pouches Actually Work? The Evidence

Do nootropic pouches work? The doses on the label versus the doses in the trials, what Reddit says, and what to expect in the first hour.

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Roon Team
September 6, 2026·10 min read
#caffeine+3
How Long Does Caffeine Anxiety Last? A Timeline by Dose and Metabolizer Type
Science

How Long Does Caffeine Anxiety Last? A Timeline by Dose and Metabolizer Type

A timeline for caffeine-induced anxiety by dose and metabolizer type, with the genetics and pharmacokinetics that explain why it varies so much.

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Roon Team
September 6, 2026·10 min read
#caffeine#anxiety
How to Stay Awake After an All-Nighter: An Hour-by-Hour Plan for the Day After
Focus

How to Stay Awake After an All-Nighter: An Hour-by-Hour Plan for the Day After

An hour-by-hour plan for the day after no sleep: timed caffeine, one short nap, and why driving is genuinely dangerous right now.

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Roon Team
September 6, 2026·8 min read
#caffeine
Caffeine on GLP-1s: Coffee, Energy Drinks, Tea, and Pouches Compared
Wellness

Caffeine on GLP-1s: Coffee, Energy Drinks, Tea, and Pouches Compared

Coffee, energy drinks, tea and caffeine pouches compared for GLP-1 users, plus the Wegovy tablet's strict 30-minute caffeine timing rule.

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Roon Team
September 5, 2026·9 min read
#caffeine
Caffeine Strips: Do Dissolvable Energy Strips Actually Work?
Alternatives

Caffeine Strips: Do Dissolvable Energy Strips Actually Work?

Do dissolvable caffeine strips work? Real mg per strip for 5TRIP, Strype, NuStrips, and MindStrips, plus a labeling mix-up worth knowing.

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Roon Team
September 4, 2026·9 min read
#caffeine
Does Caffeine Boost Metabolism? The Real Numbers (3 to 11 Percent, and Why Tolerance Eats Them)
Science

Does Caffeine Boost Metabolism? The Real Numbers (3 to 11 Percent, and Why Tolerance Eats Them)

Caffeine raises energy expenditure by roughly 3 to 11 percent for a few hours, then tolerance erodes it. Here is what the thermogenesis research shows.

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Roon Team
September 4, 2026·9 min read
#caffeine
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