Britain, France, Germany, Belgium, Italy, Portugal, and Spain were competing for power within European power politics. One way to demonstrate national preeminence was through the acquisition of territories around the world, including Africa.
Additionally, 200 milligrams of DHEA-S has been injected into the blood once or twice weekly beginning at 37 weeks gestation. Multiple doses of 50 milligrams or 100 milligrams of DHEA-S have been injected during weeks 38-42 of pregnancy.
The new 2010 recommended daily allowance (RDA) is 600 IU for those 1-70 years of age and pregnant or breastfeeding women, and 800 IU for those over 71 years of age. An adequate blood level of vitamin D is 20 nanograms per milliliter, which can be achieved through daily skin exposure to sunlight.