Biological Repair Pencil for Damaged & Discolored Nails
Description
Biological Repair Pencil restores damaged nails while treating fungal infections and yellowing
- nail fungus (onychomycosis)
- discolored nails
- brittle nails
- nail thickening
Give damaged nails their strength back, one stroke at a time
From thick, yellowed, brittle nails you hide in socks and closed shoes to a clear, precise pen routine that targets the damage daily.
What’s inside the pen

Urea to soften thickened nail plate
Urea gently breaks down the hard, rough keratin that builds up on damaged nails. It helps the nail feel smoother and allows the other actives to penetrate where a thick nail would normally block them.

Tea tree oil to target discoloration
Known for its purifying properties, tea tree oil supports a clearer-looking nail by addressing surface discoloration without the harshness of bleach or acetone-based treatments.

Vitamin E to reinforce brittle edges
Vitamin E nourishes the nail bed and cuticle, helping reduce the crumbling and splitting that make nails feel fragile. Stronger edges mean fewer snags on socks and towels.

Panthenol to condition the nail surface
Panthenol keeps the nail and surrounding skin from drying out, which is common after years of polish removers and hard water. A conditioned nail looks healthier and feels smoother, not chalky.
What’s in your pen
- 5mltotal serum volume per pen
- 4key repair actives
- 60+daily applications per pen
A daily pen that treats the cause, not the color
- 1The nails you stopped showing
Yellowing near the free edge, a thickened big toenail that presses against shoes, crumbling corners that catch on socks. You stopped wearing open sandals and flinch when someone glances at your feet.
- 2A precise serum, not a cover-up
Unlike polish or lacquer, this pen holds a thin biological repair serum. The fine brush tip lays it directly on the nail plate, where it can work on surface damage, discoloration, and brittleness instead of just hiding them.
- 3Weeks of small strokes, not months of waiting
One twist, one thin stroke, done. It dries clear and matte in about 90 seconds. With daily use, the rough, chalky surface starts to smooth, and the yellow band at the tip begins to lift from the new growth.
- 4Barefoot confidence, restored
You stop checking your nails before taking off your shoes. The nail looks smoother and more even, and the discoloration no longer draws the eye. It feels like a small daily win you can put on without thinking.
A realistic timeline
Characteristics
Reviews
Questions and answers
This pen is not a drug and does not claim to cure nail fungus. It contains tea tree oil and urea, which support clearer, more flexible nails by addressing surface damage and discoloration. It works gradually on the nail plate, not by painting over it. If you have a confirmed fungal infection, see a doctor — this is a cosmetic nail repair serum.
Yes. The precision tip dispenses a thin, controlled layer, so one pen lasts about 60 daily applications per nail. Most people use it on 2–3 problem nails, which is roughly 3–4 months of daily use.
The applicator is a fine brush tip, like a nail art pen. You twist the base to load a small drop, then paint only the nail plate. It dries in about 90 seconds and leaves no film or shine. Many people apply it at night without getting it on socks or sheets.
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