News
Higher intakes of vitamin B9 may reduce risk of colon cancer
24 February 2010
Dietary vitamin B9 (folate) protects against the development of colon cancer, says a new study.
16 January 2015
An insufficient supply of vitamin D seems to be linked to testosterone deficiency, reports a Korean study.
In the observational study, blood vitamin D and testosterone concentrations were measured in 652 men over 40 years old (1). The study results showed that vitamin D deficiency, defined by levels less than 20 ng/ml, was independently associated with testosterone deficiency. Men with vitamin D deficiency were 2.65 times more likely to have testosterone deficiency compared to those with levels above 20 ng/ml. These associations persisted after adjusting for age, season, body composition, chronic disease, alcohol use, smoking, and exercise.
The researchers noted that research indicates a potential role of vitamin D in reproductive health outcomes, such as in polycystic ovarian syndrome and erectile dysfunction (2). In addition, serum calcium is essential for male reproductive function, especially in spermatogenesis, sperm motility, and the acrosome reaction (3). Because vitamin D is a major regulator of calcium metabolism, it could influence male sex hormone synthesis. Testosterone plays an important role in maintaining muscle mass, mood, the production of red blood cells, bone health, and sexual function (4). Testosterone deficiency can cause a man to lose his sex drive, experience erectile dysfunction, develop osteoporosis, feel depressed, and/or lose muscle mass. Low testosterone levels are also a suggested risk factor for cardiovascular disease, cancer, and all-cause mortality.
24 February 2010
Dietary vitamin B9 (folate) protects against the development of colon cancer, says a new study.
25 February 2013
Many preschool children in Brazil show inadequate intakes of the vitamins D and E and calcium, says a new study.
11 April 2011
Increased intake of docosahexaenoic acid in baby formula or breast milk is safe and may benefit the growth of the pre-term infants, says a new Australian study.