Search results
Results from the WOW.Com Content Network
Selenium deficiency occurs when an organism lacks the required levels of selenium, a critical nutrient in many species.Deficiency, although relatively rare in healthy well-nourished individuals, [1] can have significant negative results, [2] affecting the health of the heart and the nervous system; contributing to depression, anxiety, and dementia; and interfering with reproduction and gestation.
Observational studies have found an association between decreased selenium levels and poorer outcomes in patients with HIV, though these studies were mostly done prior to the currently effective treatments with highly active antiretroviral therapy . Currently there is inadequate evidence to recommend routine selenium supplementation for HIV ...
Selenium deficiency, defined by low (<60% of normal) selenoenzyme activity levels in brain and endocrine tissues, occurs only when a low selenium level is linked with additional stress, such as high exposures to mercury [150] or increased oxidant stress from vitamin E deficiency.
Selenium is a vital nutrient in animals, [7] including humans. About 25 different selenocysteine-containing selenoproteins have so far been observed in human cells and tissues. [ 8 ] Since lack of selenium deprives the cell of its ability to synthesize selenoproteins, many health effects of low selenium intake are believed to be caused by the ...
Patients on LT 4 monotherapy may have blood T 3 levels low or below the normal range, [21] [79] and/or may have local T 3 deficiency in some tissues. [ 87 ] Although both molecules can have biological effects, thyroxine (T 4 ) is considered the "storage form" of thyroid hormone, while tri-iodothyronine (T 3 ) is considered the active form used ...
Copper deficiency, or hypocupremia, is defined as insufficient copper to meet the body's needs, or as a serum copper level below the normal range. [1] Symptoms may include fatigue, decreased red blood cells, early greying of the hair, and neurological problems presenting as numbness, tingling, muscle weakness, and ataxia. [2]
It is found in the blood of bluefin tuna, [1] [2] and other sea dwelling animals like turtles, mackerel, beluga, [3] and giant petrels. [4] It is an antioxidant, [5] combining with reactive oxygen species and boosting the action of GPx1. [6] Selenoneine is produced by microorganisms using enzymes that form a selenium-carbon bond. [7]
A blood test can be performed to quantify total homocysteine concentration in the plasma, of which approximately 80% is generally protein-bound. Classification of hyperhomocysteinemia is defined with respect to serum concentration as follows: [citation needed] Moderate: 15–30 nmol/mL (or μmol/L) Intermediate: 30–100 nmol/mL; Severe: > 100 ...