Key ingredients
4.2/5
Keratin is the main active in this nail strengthener.
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Keratin 3 Day Growth Nail Strengthener
$4.48
Nail-Aid Keratin 3 Day Growth is the drugstore keratin strengthener, positioned for soft nails that need a quicker hardener lane.
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The Edyt Score
4.2 / 5.0
Targets
3.9/5
This nail strengthener is a keratin.
Formula standards
4.2/5
The formula is a keratin.
The verdict
Nail-Aid Keratin 3 Day Growth is the drugstore keratin strengthener, positioned for soft nails that need a quicker hardener lane.
Compare against similar products
Side-by-side vs 6 near substitutes (OPI, essie, Sally Hansen, CND, duri, and Nail Tek) — best for, finish, wear, Edyt score, and notes. Swipe sideways to compare.
| Pick | |||||||
|---|---|---|---|---|---|---|---|
| Best for | Drugstore keratin | Salon-style strength | Tinted everyday strength | Drugstore hardener | Keratin repair | Growth support | Normal nail system |
| Finish | Treatment | Clear treatment | Sheer tint | Clear hardener | Treatment serum | Treatment coat | Clear treatment |
| Wear / system | — | — | — | — | — | — | — |
| Edyt score Methodology: The Edyt Score reflects ingredient profiles, concentration, and formulation standards. It is separate from crowd-sourced user reviews. | 4.2 | 4.7 | 4.6 | 4.6 | 4.5 | 4.5 | 4.4 |
| Notes | Keratin · Drugstore | Nail Envy · Clear | Vegan · Tinted | Drugstore · Clear | Keratin · Daily | Rejuvacote · Growth system | Formula 1 · System |
| $ / size | $4.48 | $19.95 | $10.00 | $3.38 | $22.25 | $15.99 | $12.99 |
| Shop | Buy on AmazonThis page | Buy on AmazonProduct page | Buy on AmazonProduct page | Buy on AmazonProduct page | Buy on AmazonProduct page | Buy on AmazonProduct page | Buy on AmazonProduct page |
FAQ
Who is Keratin 3 Day Growth Nail Strengthener best for?
Nail-Aid Keratin 3 Day Growth is the drugstore keratin strengthener, positioned for soft nails that need a quicker hardener lane.
How did Edyt Beauty score this nail strengthener?
Edyt Beauty rates Keratin 3 Day Growth Nail Strengthener 4.2 out of 5 from the ingredient list, who it is for, and how the formula is built. That is separate from crowd-sourced user reviews.
How does it compare to similar products?
The compare table above stacks Keratin 3 Day Growth Nail Strengthener against near substitutes for the same shopping job, including picks from OPI, essie, Sally Hansen, CND, duri, and Nail Tek. For more from the same brand, see More from Nail-Aid below.
Where can I buy it?
Shop Keratin 3 Day Growth Nail Strengthener with the Buy button when it is available. We may earn a commission from qualifying purchases. Prices and availability can change. You can also find it in our guide to Best Nail Strengtheners.
You may also like
OPI
Nail Envy Nail Strengthener Clear
$19.95
essie
Hard To Resist Nail Strengthener
$10.00
Sally Hansen
Advanced Hard as Nails Clear
$3.38
CND
RescueRXx Daily Keratin Nail Treatment
$22.25
duri
Rejuvacote 1 Nail Growth System
$15.99
Nail Tek
Strengthener Formula 1
$12.99