Stronger nails since eating healthy and exercising?

My nails have grown and gotten stronger, they always used to break.. why is this? Stronger nails since eating healthy and exercising?
If you have been eating healthier than before, then it's a big reason why it's gotten stronger. Have you been eating high quality protein and fiber foods? They include eggs, grains, nuts/seeds. Also fruits/vege's, onions, broccoli, fish.