Clinical trials: 25-Hydroxyvitamin D Concentration
Vitamin D Deficiency, 25-Hydroxyvitamin D Concentration
Is Vitamin D2 Treatment-associated Decrease in 25(OH)D3 Level a Reciprocal Phenomena?
Several studies have demonstrated that D2 treatment is associated with a decrease in 25(OH)D3 level and therefore have proposed that D3 would be preferable in term of raising total 25(OH)D level.
- Trial name
- NCT03035084
- Testing
- Vitamin D3, Vitamin D2
- Where
- Saudi Arabia
- Volunteers
- 100 people, healthy volunteers welcome
- Sponsor
- King Faisal Specialist Hospital & Research Center
Serum 25-hydroxyvitamin D Concentrations (25OHD)
Dietary Requirement for Vitamin D in Adolescents Aged 14-18 Years
It is known that low vitamin D status is a very common problem in the UK. It is also known that a lack of vitamin D availability has potentially serious health implications, especially with respect to bone and muscle function.
- Trial name
- NCT02150122
- Testing
- Vitamin D3
- Where
- United Kingdom
- Volunteers
- 120 people, healthy volunteers welcome
- Sponsor
- University of Surrey
25-hydroxyvitamin D Concentration (Vitamin D Status)
D-Light Intervention
Vitamin D insufficiency has become a global concern, with low vitamin D status associated with bone disorders, cardiovascular disease and certain cancers.
- Trial name
- D-Light (NCT02495584)
- Testing
- Fortified milk (10µg vitamin D3), 10µg vitamin D3 supplement
- Where
- United Kingdom
- Volunteers
- 52 people, healthy volunteers welcome
- Sponsor
- University of Ulster
Serum 25-hydroxyvitamin D Concentrations (25OHD)
The BreaD Study - Bio-availability of D2 Vitamin Present in Bread
Vitamin D3 is synthesized in skin exposed to ultraviolet-B-irradiation of sunlight. However, in Northern Europe, including Finland, exposure to sunlight is limited or non-existent in winter.
- Trial name
- BreaD_ODIN (NCT02525003)
- Testing
- Vitamin D2, Vitamin D3, Vitamin D2 fortified bread
- Where
- Finland
- Volunteers
- 41 people, healthy volunteers welcome
- Sponsor
- University of Helsinki
Serum 25-hydroxyvitamin D Concentrations (25OHD)
Marwo-D Research -Need for Vitamin D in Different Population Groups
Insufficient intake of vitamin D is a public health problem, affecting about 40% of the Finnish population in the winter. Vitamin D has a wide range of health effects: in addition to its effect on bone, it is known to affect…
- Trial name
- ODIN (NCT02212223)
- Testing
- Vitamin D3
- Where
- Finland
- Volunteers
- 147 people, healthy volunteers welcome
- Sponsor
- University of Helsinki