Precisio
Precisio Antifungal Nail & Foot Pen
The Complete 3-Month Treatment · 3 Pens
— $19.67 per month of treatment —
- ✓Wear sandals again — most customers see new pink nail growing in within 4 weeks, clear nail in 3 months
- ✓The first thing that actually reaches the fungus — dissolves the biofilm shield that blocked every cream, oil, and pill you've already tried
- ✓Safe with every medication you're on — topical only, never enters your bloodstream, no liver risk, no blood tests
- ✓30 seconds. Cap it. Nobody ever has to know — no smell, no mess, no packaging that announces what it's for
- ✓We refund all three pens if you don't see progress — used or not, no return required, no hoops to jump through
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"A toenail takes 3 months to grow out. One pen gets you through Month 1 — the fungus-disruption phase. Months 2 and 3 are when the clean nail replaces it. Selling you one pen would mean running out exactly when the biology needs you to keep going. The 3-Month System exists because anything less sets you up to fail the same way everything else has."
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Here's the deal, plainly.
Use Precisio every day for 60 days. At the 60-day mark, look at the base of your nail — the cuticle end where new nail is growing in. You should see new pink nail starting to emerge, less thickening, discoloration beginning to lift.
If you don't see any of that — email us at support@myprecisio.com. We refund all three pens in full. No return required. No unused-product rule. No customer service gauntlet. No fine print catch.
You used the pens. They didn't work for you. You get your money back. That's the whole policy.
Why 60 days and not 30?
Because 30 days isn't enough time to see whether Precisio is doing its job. A toenail grows roughly 1.6 millimeters per month. Sixty days is when the signal is clear — not a fully clear nail, but clear enough to know whether the treatment is working.
Why "empty-pen" specifically?
Most companies in this category require you to ship the product back unused. Which means if you actually used it, you can't claim it. We think that's a trap. The guarantee is for people who tried it, not people who didn't.
To request a refund: email support@myprecisio.com with your order number. That's it.
Verified Customer Voices
127 reviews · 4.8 average
"3 months later, I can wear flip-flops again. Thank you, science."
"I've battled toenail fungus since I was 11. I'm 44 now. This is the first thing that stuck."
"For the first time in years, I can walk confidently barefoot without nail varnish."
Frequently Asked Questions
Most people notice new pink nail growing in at the base within 4 weeks — that's the first visible sign Precisio is working. A fully clear nail from cuticle to tip takes 3 months, because that's how long a toenail takes to grow out. The infected nail has to grow out and be replaced by the new healthy nail growing in from the base. The timeline isn't a Precisio limitation — it's nail biology.
Because they can't get past the biofilm shield. Toenail fungus builds a protective matrix — a slime layer — between the nail plate and the living fungus underneath. Standard creams and oils stop at that shield's surface. Undecylenic acid, the active ingredient in Precisio, dissolves the lipid structure of the biofilm the way soap dissolves grease — so the antifungal can finally reach the fungus that's been hiding behind it.
Precisio is topical — it stays on your nail and never enters your bloodstream, which means no systemic drug interactions. Many of our customers are diabetic and use Precisio as part of their regular foot care. That said, diabetic patients have elevated risk from foot infections, so we always recommend consulting your podiatrist before adding any new foot treatment to your routine.
Yes. Because Precisio is topical and doesn't enter the bloodstream, it has no known interactions with oral medications including blood pressure medication, statins, thyroid medication, or blood thinners. If you have specific concerns, your pharmacist can confirm — but this is precisely why topical treatment is the recommended first-line approach for patients on multiple medications.
All three pens, fully used, with no return required. If at 60 days you don't see new pink nail growing in at the base, less thickening, or discoloration beginning to lift — email us your order number. We refund in full. Most companies in this category require you to ship unused product back. We think that's a trap designed to avoid paying refunds. You used it, it didn't work for you, you get your money back.
Because one pen gets you through Month 1 — the disruption phase. Months 2 and 3 are when the clean nail actually grows in to replace the infected one. Selling you one pen would mean you run out at the exact moment the biology needs you to keep going. We've seen what happens when people stop at six weeks. The fungus re-seeds from the surviving biofilm. The 3-pack isn't an upsell — it's the minimum effective course.