This is for regular nail polish (lacquer) users who want one product to cover base coat, top coat, and strengthener duty, rather than buying three separate bottles. It's a lacquer-based formula, so it's built for traditional nail polish routines rather than gel or dip powder systems.

It also suits anyone dealing with weak, splitting, or peeling nails who wants a strengthening step they can apply on bare nails between manicures.

The appeal of a 3-in-1 treatment is straightforward: instead of managing separate base coat, top coat, and strengthener bottles, one formula handles all three roles depending on how it's applied — under color, over color, or alone on bare nails.

Because it's infused with vitamin A and vitamin E rather than being a plain lacquer, the daily-strengthener use case is built into the formula itself rather than requiring a separate treatment product layered on top.

How you apply it depends on which of the three jobs you're using it for:

• As a base coat: apply 1 coat to bare, clean nails before polish color
• As a top coat: apply 1 coat over dried color to seal it in and add shine
• As a strengthener: apply on bare, unpolished nails daily

Combining three steps into one bottle brings some real advantages:

• Replaces three separate bottles (base coat, top coat, strengthener) with one, saving cost and cabinet space
• Vitamin A and E are built into the formula rather than needing a separate treatment step
• Rated for up to 7 days of shine when used as a top coat
• Vegan and 9-free formulation

There are a couple of trade-offs to a multi-tasking formula like this:

• A 3-in-1 product is unlikely to out-perform a dedicated strengthener on severely damaged or very brittle nails
• As a solvent-based lacquer (nitrocellulose, ethyl/butyl acetate), it has typical polish odor and standard dry time, unlike quick-dry or gel top coats
• Only one universal formula is offered — there's no separate version tuned specifically for extra strength versus extra shine