Researchers gave patients low dose vitamin d2 ( 1000 international units ) daily , while 11 people also received a high dose supplement to mimic blood levels found in people from sunny climates .
" It 's important to monitor the patients , but overall it appears to be very safe , " rastelli says . " Because vitamin d2 is eliminated from the body so quickly , it 's very hard to overdose . "
During the uk winter , vitamin d from foods fortified with the vegan form ( ergocalciferol , d2 ) can help to compensate for limited light exposure .
英国的冬季,强化食品中的纯素维生素d(钙化醇,维生素d2)可以帮助弥补有限的日晒。
' This is an initial study , so it needs to be confirmed , but it is potentially interesting as part of an overall strategy for managing hypertension in patients with low levels of vitamin d. ' vitamin d supplements are available in two forms - vitamin d2 and vitamin d3 - with d3 being more active and effective .