Can’t be used under gel polish This serum from OPI is another tried-and-true nail-strengthening product that I always come back to. I regularly use gel polish on my nails, so they can get a bit ...

you can also shop nail treatments and strengtheners. Top of our list? The OPI Repair Mode Serum. Resulting in a staggering 99 per cent keratin repair when used two times a day on bare nails for ...

This serum from OPI is another tried-and-true nail-strengthening product that I always come back to. I regularly use gel polish on my nails, so they can get a bit bendy and breakable between ...

including their recommendations on the best nail strengtheners for healing damaged nails. Brittle nails that crack or peel are not uncommon—in fact, Harvard Medical School suggests that over one ...