The Honest Dose
Ingredient guides, practical questions, and a closer look at what the research can and cannot tell us.
Caffeine and L-theanine for long shifts: what shift-work research shows, how to time d9-caffeine for 12-hour days and nights, and safety rules.
Read the article →: Caffeine and L-Theanine for Long Shifts: A Physician's Guide to d9-Caffeine
Caffeine and L-theanine for studying: what research shows on focus and memory, why sleep still wins, and how to time d9-caffeine on study days.
Read the article →: Caffeine and L-Theanine for Studying: A d9-Caffeine Guide
Why the afternoon slump hits around 2 or 3 p.m., why a late coffee makes tomorrow worse, and how a morning dose of d9-caffeine fits instead.
Read the article →: The Afternoon Slump: Why It Happens and How d9-Caffeine Fits
Caffeine plus L-theanine is the original nootropic stack. What the research shows, why the ratio matters, and how d9-caffeine rebuilds it.
Read the article →: The Original Nootropic Stack, Rebuilt With d9-Caffeine
Can you take L-theanine with coffee? What the research used, why the DIY version is hard to dose, and a simpler option built on d9-caffeine.
Read the article →: Can You Take L-Theanine With Coffee? A Simpler Way With d9-Caffeine
L-theanine side effects explained: headache, drowsiness, blood pressure and interactions, plus what to know when it is paired with d9-caffeine.
Read the article →: L-Theanine Side Effects: What to Know, Including With d9-Caffeine
Matcha vs coffee vs d9-caffeine with L-theanine: caffeine, L-theanine, ratio and how long each lasts, compared side by side by a physician.
Read the article →: Matcha vs Coffee vs d9-Caffeine With L-Theanine
Caffeine and L-theanine for gaming: what the esports research shows, why d9-caffeine suits long sessions, and how to time it around sleep.
Read the article →: Caffeine and L-Theanine for Gaming: Why d9-Caffeine Fits Long Sessions
Time-release caffeine and d9-caffeine both aim to last longer, but they work differently. How they compare on onset, peak, duration and dose.
Read the article →: d9-Caffeine vs Time-Release Caffeine: Two Ways to Make Caffeine Last
Are you a fast or slow caffeine metabolizer? How genes, smoking and medications change caffeine clearance, and what it means for d9-caffeine.
Read the article →: Fast or Slow Caffeine Metabolizer? What It Means for d9-Caffeine
What caffeine tolerance is, how fast it builds, how withdrawal works, and what tolerance means if you use d9-caffeine. A physician-written guide.
Read the article →: Caffeine Tolerance: What It Is and What It Means for d9-Caffeine
Why the caffeine crash happens, from adenosine catching up to daily withdrawal, and how the longer curve of d9-caffeine changes your caffeine plan.
Read the article →: The Caffeine Crash: Why It Happens and Where d9-Caffeine Fits
What the half-life of caffeine means, why it varies so much from person to person, and how d9-caffeine changes the timeline for your energy and sleep.
Read the article →: Caffeine Half-Life Explained, and How d9-Caffeine Changes It
Can d9-caffeine work as a pre-workout? What the caffeine and exercise research shows, how d9 differs, and how to time it around training and sleep.
Read the article →: d9-Caffeine as a Pre-Workout: What to Know
What is deuterium, is it safe, and why is it in d9-caffeine? A plain guide to heavy hydrogen, heavy water, and how much is in each capsule.
Read the article →: What Is Deuterium? The Heavy Hydrogen in d9-Caffeine
Caffeine pills and d9-caffeine are both caffeine, but they work on different timelines. How they compare on dose, duration and how to choose.
Read the article →: d9-Caffeine vs Caffeine Pills: What's the Difference?
How to take d9-caffeine with L-theanine: how many capsules, the best time of day, protecting your sleep, and how to count your coffee.
Read the article →: How to Take d9-Caffeine With L-Theanine: Dose, Timing and Sleep
Why pair L-theanine with d9-caffeine? What the caffeine and L-theanine research shows, why it fits the d9 peak, and what L-theanine does not do.
Read the article →: d9-Caffeine and L-Theanine: Why Pair Them?
d9-caffeine and paraxanthine fix caffeine in opposite ways. How they differ on duration, dose and research, and which one fits your day.
Read the article →: d9-Caffeine vs Paraxanthine: Which One Fits Your Day?
What is d9-caffeine? How deuterated caffeine works, what the human research shows, how long it lasts, and how to use it safely.
Read the article →: What Is d9-Caffeine? Deuterated Caffeine, Explained
