Baseline characteristics of study participants
The average age of the participants was 22⋅6 [±1⋅5] years, 56⋅44 % were women, with a median BMI of 23⋅3 [Q1: 20⋅8; Q3: 26⋅8]. Median baseline serum vitamin D [25(OH)D] levels for the 1000 IU group were 23⋅3 ng/ml [Q1: 20⋅2; Q3: 31⋅3], and for the 200 IU of 24⋅7 ng/ml [Q1: 21⋅6; Q3: 31⋅6]. No differences were found between groups concerning baseline characteristics, except for total energy intake and serum triacylglycerol levels. The baseline characteristics of the participants according to the treatment group are shown in Baseline characteristic of participants by vitamin D intervention group (Q, quartile; p values with statistical significance.