View clinical trials related to Selenium.
Filter by:As vegans are among the individuals with the lowest serum selenium levels, the randomized controlled SelVeg study aims to address the question of whether Brazil nuts could be an adequate source of selenium for diets potentially low in selenium. For this purpose, we will investigate in individuals with a vegan or omnivorous dietary pattern how a daily selenium intervention in the form of a food (here Brazil nut butter) or an over-the-counter selenium supplement affects the selenium status.
The micronutrient selenium is an essential trace element in the human body. There are more than 25 proteins in the human body contain selenium, such as glutathione peroxidase and selenoprotein, which regulate the body's antioxidant and anti-inflammatory properties. Previous literatures had shown cancer patients have lower serum selenium concentrations than normal people, and lower serum selenium levels may be associated with increased cancer mortality. More than 50% of patients with locally advanced head and neck cancer are malnourished before treatment, and these patients often have deficiency of trace elements, including selenium. In these malnourished patients, they may have to endure increased treatment toxicity and treatment interruption when receiving standard concurrent chemoradiotherapy (CCRT). Interruption of treatment may lead to reduced therapeutic efficacy and compromised survival and recurrence rate. Several small studies have investigated whether oral administration of sodium selenite in patients with head and neck cancer undergoing radiation therapy can improve side effects and affect survival rates, but the results are inconsistent. Our study will use the intravenous form of sodium selenite (Zelnite®) to investigate the effect of selenium on the treatment outcomes of locally advanced head and neck cancer patients undergoing CCRT, such as therapy-related toxicities, quality of life, changes in selenium concentration in blood, nutritional, inflammation and immune markers, and tracking long-term survival and recurrence rates.
To evaluate the effects of exogenous selenium supplementation on autoimmune thyroiditis.