As an Aesthetician for 17 years, used oil everyday, and found my nails grew stronger and faster than ever before. I make my own, grapeseed oil, jojoba, seabuckthorn, borage, vitamin E. Make grapeseed 1.5 oz. your base, adding 4 drops of the others, except seabuckthorn which is 1 drop only. If you wish to make a soothing oil FOR JOINT PAIN,add some wintergreen, peppermint, or any other penetrating oil with strong vapors. I use Olblas Oil from Swiss Formula. It is the stongest, and you can use 15 drops in your base. You can find these at any health food store. If they don't have Olblas, ask them to order it for you. It's a combination of penetrating oils. This is my own formulation, not intended to sell anything. Many Blessings on you!

I have arthritis and I'm a nail artist and technician, I find cuticle oil has solved my issues with my nails. They're a lot stronger and grow more, the ridges and dents don't appear as often and not as bad

Yup, my rheumy told me long ago it was due to health and meds. I also notice that there are times when the nails are more apt to break than at other times - usually when I'm about to go into a bad flare. It's nice to have the warning, but I dread the flare!

As a nail tech for a couple decades, I can tell you that your health and medications definitely affect the growth patterns of your nails... Psoriasis, pregnancy, trauma, and medications can affect the nail matrix...Some of these changes in nail growth patterns may grow out and the nail return to normal when you discontinue medications.

Have you had your iron levels and hemoglobin checked recently? Ridges on the nails can be a side effect of iron deficiency anemia.