Chosen because of its extensive documentation
For a period of six months, the approximately 6,000 study participants will be given either vitamin D in two different strengths or serve as a control group.
All participants will be tested at baseline and are eligible for inclusion provided their vitamin D blood status is below the recommended level.
Half the participants – the control group – will be advised to follow the official guidelines that recommend taking a daily 10-microgram supplement of vitamin D. These participants will not be monitored for compliance.
The remaining participants will be divided in two groups with one group taking capsules with 20 micrograms of vitamin D daily for six months while the other half will be taking capsules with 80 micrograms of vitamin D. When the study is terminated, vitamin D levels will be measured again in the two supplemented groups.
The British study has received funding from Fischer Family Trust, a charity organization specialised in supporting medical research and education. It is also supported by Barts Charity and the Aim Foundation.
The scientists have chosen a supplement with vitamin D from a danish company because previously published studies show that this brand is easily absorbed in the blood.