Supplements are sold by the bottle and judged by the quarter, which makes the monthly price the wrong number to look at.
A single bottle is a month. A month is not long enough to answer the question — the shortest clinical trial behind these ingredients ran six weeks, and most ran considerably longer. So the number that matters is not what one bottle costs; it is what three months costs.
In this category that usually lands somewhere between $150 and $250 for a ninety-day run, depending on how much you commit to up front. Multi-bottle pricing is built precisely around this: the per-bottle figure falls sharply as the quantity rises, because the company would rather you ran a long enough trial to form an opinion.
The best price per bottle requires the largest commitment, usually six months, before you know whether the product does anything for you. That is a real tension and it is worth naming rather than glossing.
What makes it tolerable is the return window. A sixty-day guarantee covering opened and empty bottles means the six-bottle commitment is not the irreversible decision it looks like — provided you remember that the clock starts at delivery, not when you open the first bottle. Order six, leave them in a cupboard for a month, and you have spent a month of your window.
Diary the sixtieth day after delivery when the parcel arrives. It is the single most useful thing you can do with a guarantee, and almost nobody does it.
A supplement page is not usually where you read this, but it belongs here.
| Spend | Evidence for cognitive health |
|---|---|
| A hearing test | Untreated hearing loss is among the most strongly associated modifiable factors in cognitive decline. Often free. |
| A blood pressure check | Midlife hypertension has a substantial association with later cognitive outcomes. Free at most pharmacies. |
| A B12 and thyroid panel | Both deficiencies cause reversible cognitive symptoms. One blood draw. |
| A better mattress | Sleep consolidates memory. The evidence here is not controversial. |
| Walking shoes | Aerobic exercise has the best evidence base of anything in this list, and it is free after the shoes. |
Every one of those has a stronger evidence base than anything on the supplement shelf, including this one. A page selling a supplement may as well say so, because you will find it out anyway and a page that hid it will have lost your trust by then.
Three honest positions, depending on where you are.
You have done the basics. Blood pressure checked, hearing tested, walking most days, sleeping reasonably. Then a supplement is a sensible marginal addition and fifty to seventy dollars a month is a defensible spend on a modest, slow, partial effect.
You have not done the basics. Then the money is better spent there first, and the supplement can wait three months. It will still be on sale.
Something is getting worse. Then this is the wrong aisle entirely and the right next step is a doctor.
If you are weighing one combination product against another, the useful comparison is not price per bottle but price per researched ingredient at a researched dose. A cheaper bottle carrying six ingredients at trace amounts behind a proprietary blend is not cheaper; it is a smaller thing. A readable panel is what lets you run that comparison at all, and it is the reason to prefer products that print one.
The three-bottle package covers the shortest fair trial. The six-bottle package is the lowest price per bottle.
See package optionsUsually $150 to $250 for ninety days, depending on how much you commit up front. Thirty days is not long enough to answer the question, so the monthly price is the wrong figure to compare.
It carries the lowest price per bottle but requires the largest commitment before you know whether the product works for you. A sixty-day guarantee covering opened bottles is what makes that tolerable — provided you diary the deadline, because the clock starts at delivery.
