You have to lose many afternoons to a fog before you stop blaming a bad night's sleep and start wondering if this is early cognitive decline. I don't have a clean answer, not even after ninety days of supplement tracking and staring down my own afternoon slump like it owed me money. What I do have is a spreadsheet, a stubborn 2 p.m. crash, and thirty years of accounting instincts that refuse to treat "I just feel off" as a real brain health metric.
Before we go further, the disclosure: some of the links below earn me a commission if you buy through them, at no extra cost to you. Every product mentioned here got tested and logged in my own spreadsheet — the one my wife swears has more tabs than our old tax returns. None of this comes from a medical degree; it comes from thirty years of auditing other people's numbers, redirected at my own brain. Check with an actual doctor before you act on anything I say here.
What Counts as Data When the Problem Is a Feeling?
My home office — a converted spare bedroom in our ranch house here in Plano — became the site of this whole experiment, though the habit started long before the ninety days I'm writing about now. Two monitors sit on the oak desk I hauled out of my old firm's office the week they downsized it; one screen runs the master tracking sheet, the other stays open for whatever research I'm chasing that week. A whiteboard on the wall behind me has turned into a mess of ingredient names and question marks nobody but me can read anymore. This is supplement tracking the way I used to track quarterly variances — obsessively, and probably longer than the problem deserved.
The fog itself is oddly specific, which is part of why I started measuring it in the first place. It shows up close to 2 or 3 in the afternoon, not first thing in the morning and not right before bed — a window narrow enough that I could set a recurring calendar block just to test myself inside it. It isn't sleepiness, exactly: reading a paragraph and needing to reread it, reaching for a word that used to arrive automatically, losing the thread of a conversation for three or four seconds — that's the actual shape of it, at least for me. If your version ties to a specific window and shows up as retrieval trouble rather than plain tiredness, that's the pattern worth tracking on its own instead of folding it into a general "I'm exhausted" bucket. Calling it a repeatable pattern instead of bad luck is what got me to open a workbook in the first place.
Two Neighbors, Two Very Different Spreadsheets
Two blocks over, a neighbor named Vernon Ashby started his own version of this after we got to talking by the community mailboxes one afternoon. Vernon's approach is looser than mine — he tries a supplement, skips logging for four or five days when life gets busy, then tries to reconstruct his week from memory. We compare notes sometimes, running entirely separate protocols, and his gaps are the clearest argument I've got for why a tracking method matters more than which bottle you're testing — a whole subject I've broken down in more detail elsewhere on this site.
Pam Godfrey, who's lived three houses down for going on eight years now, has an irritating habit of remembering conversations better than I do. She'll quote something I said to her three weeks earlier, word for word, while I'm still trying to place when we even talked. It's a small thing, but it's embarrassed me into taking my own note-taking more seriously than I ever did in thirty years of professional audits.
The Capsules Fell Short on My Afternoon Slump
Early on, a neighbor recommended B-complex vitamins, insisting they'd fixed her own energy crashes within a week. I tracked six weeks of them against my usual baseline and saw nothing — no change in my afternoon scores, no change in how many times I had to reread an email before it made sense. That's the first entry in my "didn't work" column, and it's a longer column than the marketing on any of these bottles would have you believe.
From there I moved into the bigger capsule names, comparing Neuro-Thrive vs. NeuroPrime side by side to see whether the steeper price on NeuroPrime bought anything measurable. It gave a cleaner lift than a fourth cup of coffee, I'll give it that, but the label promised more than my weekly numbers ever delivered — a gap between claim and result I've picked apart in a separate piece, because it's too big a topic to fit in one paragraph here. Cost per point of improvement stayed stubbornly high on both, and my afternoon slump barely noticed either one.
The Audio Test I Didn't Expect to Trust
Somewhere around week six, tired of capsules plateauing, I added a column labeled simply "Audio" and started testing The Brain Song. An accountant who trusts hard numbers isn't supposed to believe an audio program does anything, and I said as much to Pam when she asked what the headphones were for. Some of what I felt in that first week could easily be a placebo baseline doing the work rather than the program itself, and separating those two things out is its own audit I've written up elsewhere. Still, the trend line kept holding past the point where I expected it to fade.
Numbers matter more to me than the feeling does, so I want to be precise about what actually moved. My tracked scores for the afternoon slump improved close to 40 percent against my own baseline over the following weeks, which is the same trend I broke down in full in my The Brain Song Review. Whether that translates to actual return on investment once you factor in the monthly cost is a separate question — one I've run the full math on in another post, because a retired accountant can't just leave that unanswered.
Along the way I also tried The Genius Song, which works on a similar audio principle and showed up favorably in my My First 30 Days Testing Brain Supplements notes from earlier in the year. The appeal for someone who thinks in columns is the overhead: you pay once, and the cost per use keeps dropping the longer you stick with it — which quietly turned this whole log into more of a nootropics review than I ever set out to write.
Reading My Own Numbers by Week Seven
Most of my Saturday mornings that spring went to walking the trails at Craig Ranch Park in McKinney, partly for the exercise and partly because it was the only hour of the week nobody expected anything from me. Two straight hours of cross-referencing ingredient panels against research abstracts on those dual monitors leaves a particular kind of ache behind the eyes, the kind that no amount of blinking fixes, and the walk was the closest thing I had to a reset button.
Around week seven of the trial, my wife and I sat down at a restaurant, and I skimmed the menu once, ordered without circling back to double-check it, and didn't think much of it until we were driving home. A year earlier that would have taken me three passes and a moment of quietly panicking that I'd forget my own order by the time the waiter got back to me. Tracking word retrieval specifically — how fast a word arrives versus how long you sit there groping for it — turned out to be its own rabbit hole, one I've mapped out separately from the broader scores.
Closing the Books on the 90-Day Audit
Ninety days in, the fog hasn't vanished completely — I'm not going to pretend a spreadsheet fixed thirty years of wear on a brain that's earned a few slow afternoons. What changed is that the slow afternoons stopped running my schedule. If you're looking for where to start, The Brain Song is the one product in this whole audit that never once wrecked my sleep data trying to fix my daytime numbers, which matters more than people give it credit for.
Vernon still thinks I'm overdoing it with the spreadsheet, and he's probably right, but his data has more holes in it than mine does, so I'll take overdoing it. Just track your own numbers before you buy anything, including The Brain Song or whatever else you're considering — because guessing with your own brain health is a risk no accountant I know would ever sign off on.
This week, my wife caught me giving a new tab its own color scheme instead of just a name, which she says is the exact moment this stopped looking like a hobby and started looking like a disorder. She might have a point. The books are closed on this one, but I've already opened a new workbook for the next test.