DEV Community: Ivan Danilov

What I Added to My Stack to Stop the 3PM Brain Fog (It's Not Coffee)

Ivan Danilov — Sun, 19 Jul 2026 23:06:35 +0000

We optimize everything — our code, our workflows, our dev environment. But most developers completely ignore the hardware running all of it.

I used to hit a wall every day around 3PM. Sluggish thinking, zero motivation to debug anything, reaching for a third coffee that would just wreck my sleep. Sound familiar?

Here's what actually helped.
The Problem With "Just Drink More Coffee"

Caffeine masks fatigue — it doesn't fix it. If you're running on poor sleep and micronutrient deficiencies, more caffeine just means more cortisol, more anxiety, and a harder crash later.

The root issue for most developers? We sit indoors all day, eat inconsistently, skip meals during deadlines, and stare at screens. It's a perfect recipe for low vitamin D, tanked magnesium, and a fried

nervous system.

What I Actually Changed

Vitamin D3 in the morning. Got my levels tested — they were low. After 8 weeks of supplementation, the afternoon energy dip got noticeably less brutal.

Magnesium glycinate before bed. This one surprised me. Better sleep quality = better focus the next day. Simple math that I somehow ignored for years.

A real omega-3 supplement. Not flaxseed oil. Actual EPA/DHA from fish oil. The research on cognitive function and inflammation is solid. I noticed less mental fatigue during long review sessions after about a month.

The Dev Takeaway

Think of it as dependency management for your body. You can't run performance-critical software on a degraded system and wonder why the benchmarks are off.

You don't need a complicated stack. Start with bloodwork, find your actual gaps, and fix those specifically. No guessing, no 15-pill morning routines.

The best code comes from a brain that's actually running well.

Your Body Is Throwing Silent Exceptions and You're Just Catching Them as "I'm Tired"

Ivan Danilov — Thu, 16 Jul 2026 19:31:52 +0000

We're weirdly good at debugging code and weirdly bad at debugging ourselves. If a service starts throwing intermittent errors, most of us don't shrug and say "eh, Mondays." We check logs, isolate the trigger, look for patterns. But when our own body throws a warning — cracked lips, random muscle cramps, catching every cold going around — the default response is "guess I'm just tired" and we move on without ever checking the actual log.

Turns out a lot of these "vague" symptoms are surprisingly specific once you know what they usually point to. Here's the debugging checklist I wish I'd had earlier.

Cracked Corners of Your Mouth

Recurring, not weather-related, doesn't respond to lip balm. Commonly linked to low iron, B2, or B12. This is the equivalent of a stack trace pointing at a specific null value instead of a generic timeout — pretty diagnostic if you know what it usually means.

Restless Legs Right When You're Trying to Sleep

That crawling, "gotta move my legs" feeling as you're falling asleep correlates surprisingly often with low ferritin — your iron storage marker — even when standard hemoglobin looks fine on a basic panel. This is basically the health equivalent of your monitoring dashboard showing green while the actual queue is backed up — the metric everyone checks isn't the one that would've caught it.

Cuts That Take Forever to Heal, Bruises That Show Up for No Reason

Vitamin C is directly involved in collagen synthesis; vitamin K in clotting. If minor injuries are healing slower than they used to, or you're bruising from stuff that shouldn't leave a mark, both are worth checking.

Night Cramps

Classic magnesium suspect, sometimes potassium or calcium too. If you're getting woken up by a leg cramp with any regularity and you're not training like an athlete, that's not really "normal," it's a signal — same as a recurring flaky test that people keep re-running instead of actually investigating.

Hair Thinning That Doesn't Match Your Age or Genetics

Low iron and low vitamin D both correlate with hair shedding, separately from typical pattern loss. Confounded by stress too, which makes it noisier to diagnose — but if it's persistent without an obvious stress trigger, it's worth a real test instead of trying five different shampoos.

You Catch Every Cold Going Around the Office/Team

If everyone around you seems fine and you're perpetually sick, zinc and vitamin D are the two most commonly implicated — both play a direct role in immune response. Worth checking especially if you're someone who's indoors 9+ hours a day under fluorescent lighting (you know who you are).

Brain Fog Despite Decent Sleep

If your sleep tracker says you're getting reasonable hours but your brain still feels like it's running on a throttled CPU, B12 deficiency is one of the more overlooked causes — it directly affects nerve and cognitive function. More common than people think in vegetarians, vegans, and anyone over 50.

The Actual Point

None of these symptoms are a diagnosis by themselves — they overlap heavily with normal stress, bad sleep, or a rough sprint. The goal isn't to self-diagnose off a list on the internet; it's to recognize when a symptom is specific enough that it's worth pulling actual bloodwork instead of guessing at a fix, same way you wouldn't push a patch to prod based on a hunch when you could just check the logs first.

And once you do get bloodwork back and confirm an actual gap, the next detail matters too — not all forms of the same vitamin behave the same in your body (this is its own rabbit hole, worth a separate post). I've been more deliberate about that lately, sourcing basics from brands that are transparent about active forms and batch testing rather than grabbing whatever's cheapest — Sunday Natural (sunday.co.ua) is the one I've settled on for that reason, mostly because they publish what's actually in it instead of making you take it on faith.

But bloodwork first, always. Supplementing blind is just an expensive way of hoping you diagnosed yourself correctly.

Not medical advice — just a pattern-matching exercise that turned out to be more useful than I expected. If any of this sounds persistent, get it checked instead of self-treating.

Debugging Your Supplement Stack: Why "Same Dose" Doesn't Mean "Same Product"

Ivan Danilov — Wed, 15 Jul 2026 16:05:18 +0000

If you're the type of dev who reads the changelog before updating a dependency, you're going to appreciate this: most supplement labels are basically version numbers without the actual diff. Two bottles can say "B12, 1000mcg" and be running completely different implementations underneath.

I started actually reading ingredient panels after noticing a B-complex I'd been taking for months seemingly did nothing. Turns out the "nothing happened" was a legit outcome, not a placebo problem — and once I understood why, it changed how I read every label since.

The API vs. The Implementation

Think of it like this: the vitamin name on the front of the bottle is the interface. The specific chemical form is the implementation — and just like software, two implementations of the same interface can have wildly different performance characteristics.

B12 is the clearest case. Budget products almost always use cyanocobalamin — cheap to manufacture, stable on the shelf. Problem is, your body has to convert it to an active form before it can use it, and that conversion step is where a meaningful chunk of people (anyone with MTHFR gene variants, absorption issues, etc.) lose most of the value. Methylcobalamin is the bioactive form — no conversion step required — but it's pricier and less shelf-stable, so it gets skipped in cheaper formulations.

Folate has the same pattern: synthetic folic acid needs an enzyme conversion in your liver before it's usable. Methylfolate (5-MTHF) is already active. If a folic acid-heavy multivitamin left you feeling like nothing changed, this is a legitimate, underrated reason why — not just placebo skepticism.

It's basically the difference between calling an API that works for everyone versus one that silently fails for a subset of users depending on their config. Same function signature, different actual behavior.

The Dependencies Nobody Audits

Flip the bottle over — there's a second ingredient list most people never read: "other ingredients." This is the equivalent of your node_modules folder — stuff that got pulled in to make the build work, that you didn't explicitly ask for.

Common inclusions in cheap formulations:

Titanium dioxide — pure white coloring, zero function. Restricted in food products in the EU over safety concerns, still legal in supplements in a lot of markets.
Artificial dyes/flavors — mostly in gummies, purely cosmetic
Excess binders/fillers — sometimes eat up a surprising percentage of the capsule's actual mass, diluting the active dose per unit

None of this is necessarily dangerous at typical doses. But it's the same pattern as inheriting a legacy codebase with fifteen unused dependencies nobody bothered to prune — it's not that any single one breaks things, it's what the accumulation says about how carefully the whole thing was built.

Price Isn't a Reliable Signal (Same as Software)

Here's the annoying part: price alone doesn't tell you which "build" you're getting. Expensive supplements can be just as poorly formulated as cheap ones — you're sometimes paying for packaging and brand story, not better chemistry. The only way to actually know is to read both panels, the same way you'd actually read a package.json instead of trusting the README.

What I check now before buying anything:

Active vs. inactive forms: methylcobalamin > cyanocobalamin, methylfolate > folic acid, natural (d-) tocopherols > synthetic (dl-)
Third-party test results: published independently, or just self-reported on the label?
Sourcing transparency: can you actually trace where raw materials come from?
Regulatory environment: EU manufacturing standards tend to be stricter on synthetic additive limits than some other markets

I've been comparing labels across a few brands for a while now, and one that's stayed consistently transparent about all of this is Sunday Natural — sold in Ukraine via sunday.co.ua. They publish independent lab test results per batch and default to bioactive forms instead of the cheapest synthetic option, which is honestly less common than it should be at this price point.

TL;DR

Two supplements with the same number on the label can behave completely differently in your body — same interface, different implementation. The dose on the front is only half the spec. The actual form of the molecule, and what's riding along with it in the ingredient list, is the part that determines whether it actually does anything.

Next time you're comparing two products, skip the price comparison first and go read the ingredient panel like it's a diff. That's where the real difference shows up.

Not medical advice — just what I learned from actually reading labels instead of trusting the front of the bottle. If you're managing a health condition or take medications, check with a doctor before changing your supplement routine.

[Boost]

Ivan Danilov — Sun, 12 Jul 2026 09:13:02 +0000

Ivan Danilov

Jul 12

How I Prepare for Fall Burnout Season (as a Dev Who Barely Sees Sunlight)

#ai #webdev #programming #productivity

4 min read

How I Prepare for Fall Burnout Season (as a Dev Who Barely Sees Sunlight)

Ivan Danilov — Sun, 12 Jul 2026 09:09:42 +0000

Every September I go through the same cycle: energy crashes, I get sick right when a sprint deadline hits, and I spend October wondering why I feel like garbage. Turns out it's not just "back to school energy" or coincidence — there's actual physiology behind it, and as developers we're honestly more exposed to it than most people.

Here's the thing nobody tells you: if your job is 8+ hours indoors under artificial light, staring at a monitor, you're already starting fall at a disadvantage compared to people with outdoor jobs. Less incidental sunlight, less movement, more stress, worse sleep from blue light — and then the season itself piles on top of that.

So here's what I actually looked into after one too many "why am I sick during code freeze" moments.

The Core Problem: Everything Drops at Once

Summer masks a lot of deficiencies. More sunlight = more vitamin D synthesized in your skin. More daylight hours = your circadian rhythm mostly regulates itself. More fresh produce in season = easier to eat well without trying.

Once fall hits, all three of those props get pulled out simultaneously:

Sun exposure drops → vitamin D synthesis drops
Shorter days → melatonin/serotonin regulation gets thrown off → sleep quality tanks
Cold/flu season ramps up right as your diet gets less varied

If you already work indoors year-round, you're not starting from the same baseline as someone who's outside all summer. Worth factoring in.

Vitamin D — This Is the One to Actually Track

This is the big one for anyone in a desk job. Most devs are already borderline deficient by the end of summer just from working indoors — the shift to fall just makes it worse. Deficiency is sneaky because it builds slowly; you don't feel a sudden drop, you just feel gradually worse and blame it on "the sprint."

If you can get a blood test (25(OH)D) before it gets cold, do it — it removes the guesswork. If not, starting supplementation in September beats waiting until you're already fatigue-stacked in December.

B Vitamins — For When Coffee Stops Working

If your fix for afternoon energy crashes is "more caffeine," it might be worth checking B1, B6, and B12 levels instead — they're directly involved in how your cells actually produce energy, and caffeine just masks the deficit rather than fixing it. Chronic fatigue that shows up every fall, every year, is a signal to get B12 and ferritin checked rather than just increasing your caffeine intake.

Magnesium — For the "Tired But Wired" Feeling

Sound familiar: exhausted all day, then can't fall asleep once you're actually in bed staring at the ceiling replaying a bug you couldn't fix? Magnesium plays a role in nervous system regulation, and low levels are a commonly overlooked contributor to that specific "tired but wired" pattern — which gets worse in fall as daylight (and the sleep cues that come with it) shrinks.

Zinc — Actually Relevant for Cold Season

Directly involved in immune function, and worth having in check before conference season / release crunch / cold season all overlap, which for a lot of us happens right around the same few weeks in fall.

Omega-3 — The One Everyone Skips

If your diet is mostly meal-prepped or delivery, there's a decent chance you're not hitting fatty fish twice a week. Omega-3s are linked to mood and cognitive function, not just heart health — relevant if you've ever noticed your focus getting noticeably worse in the darker months.

The Actual Mistake: Timing

The biggest mistake isn't which vitamins you take — it's when. Most people (myself included, historically) start "taking vitamins for immunity" right after they get sick, which is basically too late to matter. Your body needs weeks to correct an actual deficiency, not days. If you wait until you're sick during a release week to start caring about this, you've already lost.

What I'm Actually Doing Differently This Year

Getting vitamin D and B12 tested before it gets cold, instead of guessing
Setting a recurring calendar block to actually go outside during the day — even 15 minutes helps more than people think
Starting vitamin D supplementation in September, not waiting for the "I feel awful" trigger
Not treating any of this as a replacement for actual sleep and stepping away from the screen — it just fills specific gaps, it's not a fix for burnout on its own

Fall exhaustion isn't mandatory. But like most things in this field, it's way easier to prevent than to debug after the fact.

Not medical advice — just what I looked into and found useful. If you have existing health conditions or take medications, talk to an actual doctor before changing your supplement routine.

How We Built a Free AI SEO Plugin for Ukrainian WordPress Sites (and What We Learned)

Ivan Danilov — Sat, 27 Jun 2026 09:22:48 +0000

Running Ukrainian-language WordPress sites comes with a specific set of SEO challenges that most English-focused plugins don't address well. We built NemynAI SEO Autopilot to solve them — and it's now live on WordPress.org.

The problem we were solving

Generating quality SEO content in Ukrainian is harder than it sounds:

AI tends to produce robotic, overly formal Ukrainian that doesn't read naturally
Latin slug transliteration from Cyrillic is inconsistent across plugins
Most AI content tools produce H1 duplicates that break Yoast/RankMath
Pexels image embedding usually requires a separate plugin

What we built

NemynAI SEO Autopilot connects to Claude API and generates articles with:

Natural third-person Ukrainian voice (no AI clichés, no H1 duplication)
Automatic Latin slug transliteration from Cyrillic titles
Two inline Pexels images per article
JSON-LD schema markup
Full compatibility with Yoast SEO, RankMath, and AIOSEO

The plugin is free on WordPress.org with a Freemius-powered Pro tier for higher volume.

Technical decisions worth sharing

We use WP_Filesystem instead of direct file operations for WordPress.org compliance. All API keys are stored encrypted. The article generation uses a system prompt that explicitly forbids AI writing patterns ("seamless", "delve", "comprehensive") which dramatically improved output quality.

Slug transliteration from Ukrainian Cyrillic to Latin was the trickiest piece — we ended up building a custom transliteration table based on the BGN/PCGN standard, which handles edge cases that generic libraries miss.

Results after launch

We published to WordPress.org on June 19, 2026. If you work with Ukrainian WordPress sites, the plugin is worth trying — it's free and handles several painful problems automatically.

Plugin page: wordpress.org/plugins/nemynai-seo-autopilot