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Fat is an essential nutrient that must be ingested in certain amounts in order for certain bodily functions to occur. People who do not eat enough fat could potentially suffer from poor vitamin absorption, depression, and an increased risk for high blood pressure and cholesterol, according to SparkP


If a person does not get enough exercise then that person will be more likely to have a variety of health problems including obesity, heart disease, Type 2 diabetes, poor mental health such as depression and cancers according to the United States Centers for Disease Control and Prevention. CBS News


Short term effects of not drinking enough water include fatigue, the inability to focus and headaches, and long term effects can range from constipation to kidney stones. In severe cases, dehydration can lead to death, according to WebMD.


Without enough fat in the diet, hunger is not satisfied at mealtime, the skin becomes dry and brittle and mental clarity may become a problem, according to Self. This source adds that along with helping to dissolve fat-soluble vitamins, such as A, D, K and E, into the bloodstream, fat helps to build


According to the U.S. Center for Disease Control and Prevention, iron deficiency can delay infant motor and mental function, cause pre-term birth during pregnancy and create fatigue and decreased mental function in adults. Lack of iron in the body is the leading cause of anemia and the most common n


WebMD divides the essential minerals that the human body needs into two categories: major minerals and trace minerals. If levels of any of the seven major or nine trace minerals are low, body structures and functions such as the nerves, bones, teeth, muscles, digestion and blood clotting, can be aff


If you don't eat enough protein over a long period of time, you're susceptible to reduced bone density, increased rates of bone loss, and a decrease in the absorption of intestinal calcium, according to The Journal of Nutrition. The amount of protein needed in the diet changes with age and varies by


A deficiency of sodium, which is medically known as hyponatremia, can manifest in a range of physical symptoms, including convulsions, fatigue, headache, loss of appetite, muscle spasms, cramps, nausea, vomiting and restlessness. In severe instances, decreased consciousness, hallucinations, brain he


Too few carbohydrates in the diet causes an energy deficit that forces the body to break down stored energy and seek energy from less desirable foods, which can trigger unwanted side effects. According to MedlinePlus, carbohydrates are the body's predominant source of glucose, which provides the fue


When a human eats less than 50 grams of carbohydrates per day for several days in a row, the body starts burning fat instead of sugar for energy. This metabolic state is sometimes called ketosis, because the body manufactures chemicals called ketone bodies to provide fuel for the brain.