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Fingernails that are very soft or flake apart easily could indicate a lack of the protein keratin, which is typically caused by a sudden nutritional change that deprives the body of essential vitamins and nutrients. Ridges on nails may indicate malnourishment or a lack of iron, says Everyday Health.


Biotin, a coenzyme and B vitamin also known as vitamin H, may help strengthen brittle nails, according to MedlinePlus. While biotin won't make nails grow faster, WebMD states that it may prevent nails from breaking.


Zinc deficiency does not cause nails to turn white, according to Dr. Andrew Weil. Liver disease can cause fingernails to turn completely white. White spots on fingernails, called leukonychia, typically develop as a result of a minor injury, such as banging or knocking the fingers, but can also occur


According to the Mayo Clinic, a vitamin D deficiency takes place when the level of vitamin D in a person's body is lower than normal. Vitamin D is produced by the body when it is exposed to sunlight.


Some possible signs of vitamin D deficiency include frequent infections, depression and cardiovascular disease. Dental cavities, sleep apnea and erectile dysfunction may also result from insufficient vitamin D, according to MedicineNet. Vitamin D plays an important role in reducing inflammation in t


Although many symptoms of vitamin D deficiency are mild and go unnoticed, the most common symptoms include muscle weakness or bone pain, according to WebMD. Some people may also feel more fatigued than usual.


Vitamin D deficiency is linked with increased risks of osteoarthritis, cancer, cardiovascular disease and depression. Low levels of vitamin D are also associated with autoimmune disorders, multiple sclerosis and Type 1 diabetes, as reported by Healthline.


Serious symptoms of vitamin E deficiency include muscle weakness, loss of muscle mass, unsteady walking, vision problems and abnormal eye movements, according to the University of Maryland Medical Center. Long-term deficiencies may cause liver and kidney problems in patients. People who cannot absor


Avoiding direct sunlight and eating a diet containing insufficient amounts of vitamin D can lead to vitamin D deficiency, according to WebMD. Illnesses that damage the ability of the intestine to absorb vitamin D, such as celiac disease, cystic fibrosis and Crohn's disease, can also lead to vitamin


The signs of vitamin B deficiency vary depending on the type of B vitamin that is lacking, but symptoms of vitamin B12 deficiency typically include confusion, paranoia, anemia and tingling extremities, according to Healthline. Inadequate amounts of B6 can lead to skin problems and depression.