About NutriStack Lab — Personal Health Journal

About This Blog

I'm Erik Lindström. I'm not a doctor, a dietitian, or a researcher. I'm someone who spent years taking the wrong supplements in the wrong ways — and eventually started writing down what actually changed when I got it right.

Who I Am

I'm 36, based in Stockholm, and I've spent the last decade working in software infrastructure. Desk job, screen-heavy days, not much movement between 9 and 6. The kind of lifestyle that eventually catches up with you in ways that don't show up on a standard blood panel.

I'm not a healthcare professional. I don't have credentials behind my name. What I do have is a detailed journal going back to 2019, a fairly obsessive approach to tracking one variable at a time, and a high tolerance for reading dry research papers late at night.

Why I Started This

Around 33, I started hitting a consistent wall at around 3pm — not just tired, but mentally flatlined. I was also sleeping seven or eight hours and waking up feeling like I hadn't slept at all. I started wearing a sleep tracker (Oura, then later Garmin) and noticed my deep sleep was consistently low. My HRV was declining. My GP ran a full blood panel, found nothing alarming outside mildly low ferritin, and told me to reduce stress.

That wasn't a satisfying answer. So I started reading — PubMed papers, meta-analyses, review articles. And I started experimenting, carefully, one variable at a time. I kept a paper notebook that eventually became a spreadsheet. After three years and more wasted money than I care to admit, some patterns emerged that were genuinely useful.

NutriStack Lab is that notebook, made public. It is not a research journal. It is a record of what I tested, what I noticed, and what the evidence actually says when you dig past the headline claims.

How I Test Things

My process is simple and probably not rigorous enough by scientific standards — but it's consistent. I introduce one change at a time and give it at least four weeks before drawing any conclusions. I track sleep quality, HRV (resting), afternoon energy (1–10 self-report), and any notable changes in digestion, mood, or cognition. I don't always know what's placebo. I try to say that when it's relevant.

• Minimum 4 weeks per supplement — shorter than that tells you almost nothing
• One variable at a time — stacking three things at once makes cause unclear
• Consistent timing and dosage — I note the exact form, dose, and when I take it
• Sleep and HRV as primary signals — they're less gameable than subjective mood

What You'll Find Here

Every post is grounded in my own testing and cross-referenced against peer-reviewed literature. I write in first person because these are my observations — not clinical conclusions. What worked for me may not work for you, and I try to say that clearly.

• Timing and absorption — when and how you take something matters as much as what you take
• Combinations and interactions — some nutrients enhance each other; some block absorption entirely
• Form and dosage — the difference between magnesium glycinate and magnesium oxide is not trivial
• Mistakes I made — the posts where I got things wrong are often the most useful ones

How I Verify What I Write

I don't publish a factual claim unless I can trace it to a primary source. My standard references are PubMed/MEDLINE, the NIH Office of Dietary Supplements, the Cochrane Library, and EFSA. When the evidence is weak or conflicting, I say so explicitly.

I include the PMID number for studies I reference directly. If something I've written turns out to be wrong, I update it when I find out. Several posts have been revised after I re-read the original studies more carefully.

What This Blog Is Not

NutriStack Lab is not a medical institution, a supplement company, or an academic publication. I am not a licensed healthcare professional. Nothing here is medical advice. Please read the Medical Disclaimer before acting on anything you find here.

Affiliate Disclosure

Some posts contain affiliate links to iHerb (code: OXV5394). If you buy through those links, I earn a small commission at no extra cost to you. This does not influence what I write. I don't accept sponsored posts or paid reviews.

— Erik Lindström, Stockholm