Expert opinion
Blue Light – Lutein and Zeaxanthin for Eye Health
14 July 2017
Blue light is part of the visible light spectrum. It is present in sunlight, which also contains invisible ultraviolet rays
11 September 2013
A new US study has linked intakes higher than 800 IU of vitamin D per day with an up to 63% decreased risk of developing lung cancer in never-smoking, postmenopausal women.
The study analyzed the dietary and supplement intakes of vitamin D of 128,779 postmenopausal women, including 1,771 women who developed lung cancer within 17 years (1). While no significant association betwe-en vitamin D intakes and lung cancer risk was observed overall, a clear association with a lower risk of de-veloping lung cancer was seen among participants who never smoked in their lives and had a total vitamin D intake higher than 400 IU/day. Participants who took more than 800 IU per day had a 63% decreased risk of lung cancer compared to those who took less than 100 IU/day. Among the participants who had received a daily supplementation of 1 gram of calcium plus 400 IU of vitamin D3 or a placebo, a lung cancer risk reduc-tion was only observed in those who had a daily vitamin A intake lower than 1000 micrograms of retinol equivalents.
The researchers commented that vitamin D has been suggested to have cancer-preventing effects by regulating cell division and growth (proliferation) as well as the development of new blood vessels (angio-genesis) (2, 3). The observation that increased vitamin D intakes only showed efficacy among study partici-pants who never smoked may indicate that vitamin D may be more effective at preventing or reversing tumor development which is not tobacco-related. According to the scientists, the association between comb-ined vitamin D and calcium supplementation and lung cancer risk reduction observed in a subgroup of smo-king and non-smoking participants with lower vitamin A intake must be interpreted with caution because of the small number of lung cancer cases in this group. Increased intakes of beta-carotene in supplements did not influence lung cancer risk.
14 July 2017
Blue light is part of the visible light spectrum. It is present in sunlight, which also contains invisible ultraviolet rays
17 February 2010
High blood levels of vitamin D may be at a 33 percent lower risk of developing heart disease, says a new review.
19 August 2009
Vitamin D may inhibit the build-up of cholesterol in blood vessels improving heart health of diabetics, says in vitro study.