### condition | deficiency:

Nutritional deficiency
* Nutritional deficiencies are almost never a cause of hair loss.
* Nutritional deficiencies are common due to malabsorption
  - in rosacea
  - problems among reptile pets
  - rare, even if the problem of iron is still important
  - widespread among nursing home residents
* Nutritional deficiencies can adversely affect the brain and the emotions
  - also cause immune compromise
  - cause seizures
  - have severe and permanent effects on brain function
  - severely affect memory, especially minerals
* Nutritional deficiencies cause disease
  - hardening of the arteries
  - create imbalances in body chemistry
  - develop as a result of the complications of the disease
  - increase the likelihood of animals to exhibit nitrate toxicity
  - weaken eliminative organs
* can alter tear composition and be improved following supplementation
  - lower resistance and increase the risk of certain types of cancers
* has long-term negative health effects and it is well hidden.
* is believed to be a leading cause of disease, both physical and mental.

Oxygen deficiency
* can be a serious hazard in enclosed or confined spaces
  - cause a lot of disorders and health problems
  - result in everything from low energy to life-threatening disease
* causes subnormal or ill health.

### condition | deficiency:

Potassium deficiency
* Most potassium deficiencies cause death.
* Most potassium deficiencies cause premature death
  - leaf death
* Potassium deficiencies are more common on very sandy soils or where root systems are restricted
  - rare in turf in Indiana soils
* Potassium deficiencies can encourage kidney problems
  - show up on greens, especially in late fall
  - weaken stalks
* becomes first evident in older leaves.
* can lead to cardiac dysfunction and muscular weakness
  - irregular heart beat and fatigue
* causes stunted growth with leaves close together
  - urinary ammonium wasting
  - yellowing of the leaves, starting at the outer edges
* is common in most species of palms in Florida
  - perhaps the most widespread and serious of all disorders in Florida palms
* is rare in horses
  - when a balanced diet is kept
  - uncommon in the United States
* reduces tree growth, yields and fruit quality.

Progesterone deficiency
* can also be a cause of depression , irritability, mood swings, and insomnia.
* is also a concern in men, because of xenoestrogens.

Protein deficiency
* Most protein deficiencies cause health problems
  - serious health problems
* Protein deficiencies are common in many parts of the world.
* Protein deficiencies cause serious health problems
* has severe consequences for the body.
* is also an important consequence of long-term or high volume infection
  - extremely unlikely on a diet drawn from a variety of plant foods
  - one of the last great American myths

Salt deficiency
* causes heat cramps, nausea and vomiting.
* very serious problem that can occur during the breeding season.

### condition | deficiency:

Selenium deficiency
* Selenium deficiencies result in sudden death, liver necrosis, mulberry heart and pale muscles.
* alters the lipoxygenase pathway and mitogenic response in bovine lymphocytes.
* can greatly increase the risk of asthma.
* enhances the pathogenicity of influenza virus infection.
* increases the pathology of an influenza virus infection.
* is associated with cardiomyopathy, muscular dystrophy and cystic fibrosis
  - rare in otherwise healthy, well-nourished individuals
* mitigates hypothyroxinemia in iodine-deficient subjects.
* problem in areas of the world where the soil contains little selenium.
* seems quite common in the tropics.
* significant problem in Alberta.
+ Selenium, Uses, In the human body: Chemical elements :: Nonmetals
  * Selenium deficiency is rare. Although selenium has some helpful effects on the human body, it also has some harmful effects and only a very little should be eaten.