Have you tried this? It’s worked well for me.
Hard As Hoof Nail Strengthening Cream with Coconut Scent Nail Strengthener, Nail Growth & Conditioning Cuticle Cream Stops Splits, Chips, Cracks & Strengthens Nails, 1 oz https://www.amazon.com/dp/B005HGWGVS/ref=cm_sw_r_cp_api_glt_fabc_41RE9Q5D1WQFR348MJRD?_encoding=UTF8&psc=1