Compound Deep-Dive

Tier 2: Grey AreaThe most effective and accessible performance enhancer for both brain and body.

Caffeine

1,3,7-trimethylxanthineAnhydrous caffeineGuarana extract

The gold standard for energy.

Hype Risk

1/10

Noticeability

9/10

Evidence Tier

Strong

Cost / Month

~$3

Sleep Disruptor

What it's actually good for

Energy

Research Supported

Reduces perceived exertion and fatigue.

Focus

Research Supported

Improves reaction time and vigilance.

Muscle

Research Supported

Increases power output and endurance.

Mood

Mixed Evidence

Can improve mood but may trigger anxiety.

Sleep: misalignedRecovery: neutralLongevity: neutralImmunity: neutral

How it works

Extensively researched stimulant that reliably improves alertness, cognitive function, and physical performance. It is the most widely consumed psychoactive substance globally with a high safety profile at moderate doses.

Antagonizes adenosine receptors in the brain to prevent drowsiness and increases the release of neurotransmitters like dopamine and norepinephrine.

Safety

Can cause jitteriness, anxiety, and insomnia
May increase heart rate and blood pressure
Withdrawal can cause headaches and fatigue

The full StackRoast report adds

The exact dose, timing, and effective range to actually run it at
Where people go wrong with it — the dose-creep and timing traps
What Caffeine clashes with or duplicates in your stack
Which brands are actually worth buying

Roast My Stack →

Community Reality Check

Distilled from 10000 threads

Confidence: high

What users report

Immediate alertness
Enhanced workout intensity
Improved productivity

The catch

Dependency
Insomnia
Anxiety

Side effects reported

Jitters
Heart palpitations
Headaches

https://www.reddit.com/r/Supplementshttps://www.reddit.com/r/nootropics

The Receipts

8 sources— studies, videos & links

Videos

Using Caffeine to Optimize Mental & Physical Performance

Huberman Lab

Comprehensive breakdown of caffeine protocols for focus and performance.

Caffeine Is Bad For You- BULLSH*T

Renaissance Periodization

Evidence-based debunking of common caffeine myths in fitness.

Papers

Guest et al. 2021review2021

The official ISSN position stand confirming caffeine's efficacy for endurance and strength.

McLellan et al. 2016review2016

A review of caffeine's effects on cognitive and physical function in real-world tasks.

Creators

Andrew Huberman

YouTube

Neuroscientist at Stanford providing detailed physiological protocols.

Mike Israetel

YouTube

Exercise scientist specializing in performance and hypertrophy.

Clinical Sources

Examine.comclinical FDA Safety Guideofficial

Taking Caffeine in a stack? Find out if the combination actually makes sense.

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