There are a number of reasons someone may be experiencing weak and brittle nails, including not enough thyroid hormone, low protein intake or difficulty digesting/absorbing protein , and nutrient deficiencies like iron , zinc , and essential fatty acids
Muskegon Surgical Associates uses the Kirby-Desai Scale to best determine the number of treatments you will need
See how it stacks up: Disclaimer: The information in this comparison chart is based on the best available data as of September 1, 2025
Reduces oxidative damage from sun exposure
Cantini, G., Di Franco, A., Mannucci, E., & Luconi, M