I have those vertical ridges on my nails too - they used to be on every single one of my nails, and some were really quite prominent!
But, if you have "pitted" nails, it can be a very early sign of psoriasis, and is something to be concerned about
. I have been using coconut oil as a moisturizer (even on my nails), and use "Align" brand probiotics with has only one strain of probiotics - b. infantis - which has been proven to help stop psoriasis:
/www.ncbi.nlm.nih.gov/pubmed/23842110