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 5 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
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
We don't have a description for Butyl Acetate yet.
Ethyl Acetate is a fragrance.
Isopropyl Alcohol is more commonly known as rubbing alcohol. It is most commonly used as a solvent, meaning it helps other ingredients dissolve.
This ingredient is an astringent alcohol. Astringent alcohols may also irritate skin as they high amounts may strip away your skin's natural oils.
Other types of astringent alcohols include:
According to the National Rosacea Society based in the US, you should be mindful of products with these alcohols in the top half of ingredients.
Any type of sanitizing product will have high amounts of alcohol to help kill bacteria and viruses.
Learn more about Isopropyl AlcoholWe don't have a description for Nitrocellulose yet.
We don't have a description for CI 60725 yet.
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
