Why fingernails grow slowly?

Fingernails grow slowly due to their composition and the biological processes involved in nail growth. Nails are made of a protein called keratin, and their growth is influenced by factors such as blood flow, nutrition, and age. On average, fingernails grow about 1/8 inch (3 mm) per month, with growth rates varying among individuals. Additionally, the growth is slower than that of other tissues in the body because nails are not vital for survival and require less metabolic energy.