If you have brittle nails, it's generally a sign of deeper nutritional issues.

This video has a lot of good information, despite repeating the low IQ "complete protein" criticism of plant-based diets.

https://odysee.com/@DrBerg:4/the-deeper-causes-of-brittle-nails:8?r=iDbwBbRY4tKbiFWma4v4ZQZRoEeni1G5