My 16-month theanine self-experiment

Trust and Prior Analysis

• Some readers question the author’s judgment based on earlier posts but others note those used then-current data; disagreement centers on interpretation rather than outright incompetence.
• Several commenters say they now trust rigorous blinded self-experiments (including this one) more than unblinded anecdotes or influencer claims.

Experimental Design, Controls, and Statistics

• Many like the blinding and logging, but several criticize using vitamin D as a “placebo” since it plausibly affects mood and energy (though not acutely).
• Others argue an inert capsule (cellulose, chalk) would have been better, and that checking which pill was taken on each day partially weakens blinding.
• Debate over what the stats actually show: some emphasize that small “technically significant” effects may be clinically irrelevant; others worry about design issues (multiple comparisons, regression to the mean, lack of a “no pill” baseline).
• Strong disagreement over the value of N=1 trials: some call them pseudoscientific and underpowered; others stress they’re appropriate for learning “does this help me?” and can be well-designed, especially with repeated randomized crossovers.

Placebo, Ritual, and Subjective Perception

• Many note how mean reversion, placebo, and the mere act of “doing something for myself” (making tea, taking a pill, going to the doctor) can strongly change stress perception.
• Several argue that non-obvious mood/anxiety effects are easy to misjudge without structured tracking, in contrast to dramatic drugs or psychedelics.

Theanine Effects and Caffeine Interaction

• Multiple anecdotes claim theanine alone is subtle or useless, but theanine + caffeine reduces jitteriness and anxiety, enabling better focus.
• Others report no effect even at high doses, or paradoxical anxiety and withdrawal-like rebound.
• Some suggest dose, brand quality (e.g., specific extraction methods), metabolism, ADHD status, or receptor sensitivity may explain divergent responses, but this remains speculative.
• A few posit theanine might act more slowly or cumulatively than the experiment’s 1‑hour window captures.

Supplement Efficacy, Safety, and Quality

• Strong skepticism that over-the-counter supplements meaningfully treat serious anxiety/insomnia; comparisons made to weak effects of caffeine on sleep in trials vs dramatic lived experiences.
• Discussion of turmeric/cinnamon recipes triggers warnings about coumarin, hepatotoxicity, and heavy metal contamination; emphasizes inconsistent supplement regulation and need for trusted brands and testing.
• Some argue that if most supplements really worked, pharma would have extracted and patented active compounds by now.

Self‑Experimentation Tools and Crowdsourced Trials

• Several want an app or service to automate blinded self-experiments (randomized pill packs, logging, basic stats) to test caffeine, vitamin D, nootropics, etc.
• Existing apps and services are mentioned, but users note gaps: lack of blinding, protocol templates, or guidance on power and confounders.
• A few envision crowdfunded proper RCTs for popular but poorly studied supplements.

Health Advice, Anecdotes, and Citizen Science

• Meta-discussion about HN’s medical threads: lots of confident anecdotes, little understanding of effect sizes, genetics, or hierarchy of evidence.
• Some defend anecdotes as hypothesis-generating (“phenomena exist before studies”); others rebut with confirmation-bias concerns and stress the need for blinding and replication.
• Several praise the article as exemplary “citizen science”: transparent protocol, raw data, explicit limitations—far better than typical supplement marketing, even if ultimately inconclusive for theanine.