Hi Barb. I am on both of those meds. I use Pura d’or organic oil for nails and cuticles. I also eat a well-balanced diet and take vitamins D, K, and Magnesium. It has helped my nails, and Yuka gives it a 100 % rating for health, containing no harmful additives. I get it on Amazon. Good luck with your journey of keeping BC Mets at bay and maintaining a healthy body, hair, and nails. 🙏

Collagen is bad for breast cancer. DO NOT take it. It’s been studied and unfortunately it specifically promotes bc through various mechanisms. Better to do a topical treatment for nails, but there’s no miracle.

My nails are thin and break easily

Ask your Dr. if you can take collagen and what kind.
Collagen builds up nails, helps with joint pain, and adds collagen to one joints.

Does anything help