Hydration is equally important. Nails contain a certain amount of water that helps maintain flexibility. When nails become excessively dry, they are more likely to crack and split. Many people focus on moisturizing their skin while overlooking the needs of their nails. Yet adequate hydration inside and outside the body can significantly influence nail health.
Environmental exposure is another major factor. Daily activities frequently expose nails to water, soap, detergents, and cleaning chemicals. While these products are useful for hygiene and household maintenance, repeated contact can strip away natural oils that protect the nail surface.
People who wash dishes by hand, clean frequently, work in healthcare, or spend long hours handling water often experience increased nail brittleness. The cycle of repeated wetting and drying can weaken the bond between nail layers, causing them to separate and peel.
Cosmetic practices may also contribute. Frequent use of nail polish remover—particularly products containing acetone—can dry out the nail plate. Artificial nails, gel manicures, and aggressive filing techniques may place additional stress on already fragile nails. While these beauty treatments are generally safe when used appropriately, excessive use may gradually weaken nail integrity.
Age can influence nail condition as well. As people grow older, natural oil production and moisture retention tend to decline. Nails may grow more slowly and become increasingly susceptible to cracking. Although aging itself cannot be prevented, proper nail care can help reduce many of these effects.
Health professionals also point out that brittle nails sometimes reflect broader medical conditions. Thyroid disorders, for example, can affect metabolism and tissue growth, leading to noticeable changes in nail appearance. Skin conditions such as eczema and psoriasis may involve the nails directly, causing thickening, pitting, or fragility.