what is the active ingredient? is it amorolfine?

I believe the active ingredient is lactic acid. My recollection from Intro to Biology is that lactic acid is an enzyme that dissolves keratin.

Do you apply this and then put a band aid over it and change it every day?

You wash the nail and apply it once a day. No band-aid. I applied it just like Teri did, at night just before bed.

Is it better if you do not polish your nails

You can use breathable nail polish!

does it help to prevent toe nail from splitting?

Im not sure I only used it for some cracks and creases that I had on the upper layer, this worked for me to remove the upper layer and now my nails are flat and like new again.

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Fungal Nail Renewal, Restorative Repair for Damaged Nails, .33 oz

Product ID: 727565750

Details

Brand
Kerasal
Item Form
Liquid
Item Weight
0.27 g
Liquid Volume
0.33 fluid
Specialty
Damaged Nail

🎯Precision applicator for targeted, mess-free use

💧Hydrates & exfoliates with urea & lactic acid

📈Trusted by 10M+ users since 2010

25281CFA

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Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

💅 Restore your nails, reclaim your confidence.

COMPACT FRAGRANCE FREE - Discreet 0.33 oz size fits your lifestyle, perfect for on-the-go nail repair.
TARGETED PRECISION APPLICATION - Mess-free, easy-to-use tip for daily care exactly where you need it.
CLINICALLY TRUSTED NAIL RENEWAL - Join over 10 million users transforming damaged nails since 2010.
DERMATOLOGIST DEVELOPED FORMULA - Gentle exfoliation and hydration with powerful urea and lactic acid blend.
VISIBLE NAIL CLARITY SMOOTHNESS - Reduces thickness, roughness, ridges, and discoloration for healthier nails.

Kerasal Fungal Nail Renewal is a dermatologist-developed liquid treatment designed to repair and restore damaged nails. Featuring a precision applicator and a formula enriched with urea and lactic acid, it exfoliates, hydrates, and smooths nails, reducing thickness, ridges, and discoloration. Trusted by over 10 million users worldwide since 2010, this compact, fragrance-free solution promotes healthier-looking nails with consistent daily use.

Specifications

ASIN	B007ADOL28
ASIN	B007ADOL28
Best Sellers Rank	#858 in Health & Household ( See Top 100 in Health & Household ) #1 in Nail Fungus Treatments #166 in Sales & Deals
Brand Name	Kerasal
Customer Reviews	4.2 4.2 out of 5 stars (67,464)
Global Trade Identification Number	00857074001613
Item Form	Liquid
Item Type Name	Nail Renewal
Item Weight	0.27 g
Item model number	857074001613N
Liquid Volume	0.33 fluid ounces
Manufacturer	Advantice Health LLC
Manufacturer	Advantice Health LLC
Manufacturer Part Number	40857074001611
Model Number	857074001613N
Number of Items	1
Product Dimensions	0.75 x 3.75 x 5.5 inches; 0.01 ounces
Scent Name	Fragrance free
Size	0.33 Fl Oz (Pack of 1)
Specialty	Damaged Nail Repair
UPC	857074001613
UPC	857074001613

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