Corvane sells direct from their own site only — not Amazon, not in stores. And the thing worth understanding before you click through isn't what it costs. It's the guarantee, because of how neatly it lines up with the timeline above.
They give you 90 days. If you don't feel the difference, they refund 100% of your purchase. Not store credit, not a partial, and not conditional on sending back something unopened — the whole point is that you use it.
Now put that next to the sixty nights.
The turning point, the window where the men who respond find out that they have, lands well inside the first two months. Which means the arithmetic works out unusually well in your favour here: you can take it every night all the way through that window, reach the far side of it, sit with the result for another few weeks, and still be comfortably inside the guarantee.
That's what makes this a genuinely low-stakes thing to try. You're not being asked to gamble on whether a plant works. You're being asked to run a sixty-night trial on yourself, with a month of slack on the end, and to send it back if the answer turns out to be no.
The only real cost is the two minutes it takes to order and the space on your nightstand.
If you'd rather cover the whole window in one go, Corvane's multi-bottle options work out considerably better per bottle than ordering one at a time, and there's a subscribe-and-save option delivered every couple of months that you can cancel online whenever you want. All of it sits under the same 90 days.
Two reasons not to sit on this for a fortnight.
The first is that the guarantee clock starts when you order, not when you decide to get serious about it. Every week the bottle isn't on your nightstand is a week of the ninety running down without you using any of it — and the entire value of a 90-day window is having enough room to run the full sixty nights inside it and still have time left to think about what happened.
The second is stock. Corvane currently shows a low-stock notice on the product page, and their stated reason is the one you'd expect from everything above: the formula is built on standardised botanical extracts, and saw palmetto is a wild-harvested crop with genuinely variable yields from season to season.
Batch availability moves with the harvest, and the current offer and the stock are two separate things that can change independently of each other.
And then there's the calculation you're actually making.
Sixty nights, fully refundable, against another year of the four o'clock wall. Another year of the aisle seat. Another year of mapping the rest stops before a long drive, passing on the late dinner, dreading the overnight at someone else's house — and a wife who wakes up every single time you do and has never once said a word about it.
Worst case: you take it for sixty nights, nothing changes, you ask for your money back, and you've lost nothing but the time — and you walk into your doctor's office knowing considerably more than you did when you started.
Best case: you get the first third of your night back, and you stop quietly organising your life around a walnut that turned into a plum.