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
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?
