Grimnes, Guri Four months vitamin D supplementation to vitamin D insufficient individuals does not improve muscular strength: A randomized controlled trial. [electronic resource] - PloS one 2019 - e0225600 p. digital Publication Type: Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't ISSN: 1932-6203 Standard No.: 10.1371/journal.pone.0225600 doi Subjects--Topical Terms: AdultAgedAged, 80 and overDietary SupplementsDrug Administration ScheduleFemaleHumansMaleMiddle AgedMuscle Strength--drug effectsMuscle Strength DynamometerMuscle, Skeletal--drug effectsPlacebos--administration & dosageTime FactorsVitamin D--administration & dosageVitamin D Deficiency--blood