Sally Hansen Hard as Nails Nail Hardener Versus Nail-Aid Biotin Ultimate Strength
Updated on May 11, 2025
Overview
What they are
These products are both cruelty-free and fungal acne (malassezia) safe nail care. They have a total of 0 ingredients in common
Free From
They both do not contain any oils, parabens, silicones or sulfates
What's Inside
They both contain harsh alcohols and fragrances
We independently verify ingredients, and our claims are backed by peer-reviewed research. Spot a product that needs an update? Let us know.
Ingredient Info
Sally Hansen Hard as Nails Nail Hardener 10 ingredients
Nail-Aid Biotin Ultimate Strength 13 ingredients
What's inside (and what isn't)
What's inside (and what isn't)
At a glance
Click on any of the items below to learn more
Sally Hansen Hard as Nails Nail Hardener 10 ingredients
Nail-Aid Biotin Ultimate Strength 13 ingredients
Concerns
Concerns
Ingredients Side-by-side
Ingredient Ratings
Here's what our community thinks of the ingredients in these products.
When to use
Sally Hansen Hard as Nails Nail Hardener 10 ingredients
Nail-Aid Biotin Ultimate Strength 13 ingredients
Reviews
Here's what our community thinks
