Hello Elizabeth @ess77, Thanks again for the kind words! I thought I would try to answer your question from my response to @peach414144 in the What's outside of your picture window discussion (https://connect.mayoclinic.org/comment/610874/) in this discussion on Supplements. Peach mentioned a side benefit of taking Hydroxychloroquine for her psoriatic arthritis was that her fingernails were growing back healthier than ever. I don't take the same medication as Peach. I had mentioned taking a collagen supplement along with my wife and it has improved our fingernail health noticeably.

I take a few different supplements that I have researched and have little to no risk as far as I know...but I still run supplements by my primary care doctor or a pharmacist. If you read the description and provided link for this discussion at the top by @contentandwell and the following post by @jakedduck1, you can get an idea of why it's good to research any supplement you take and also run them by your doctor.

Here's are a couple of the sites I used when I was looking for any health benefits of taking a collagen supplement.
-- Top 6 Benefits of Taking Collagen Supplements: https://www.healthline.com/nutrition/collagen-benefits
-- Collagen Types and Linked Disorders: https://www.news-medical.net/health/Collagen-Types-and-Linked-Disorders.aspx

Here is another great article you might find helpful -- Get radiant hair, skin and nails naturally: https://www.mayoclinichealthsystem.org/hometown-health/speaking-of-health/get-radiant-hair-skin-and-nails-naturally