Publications by authors named "Rachael M Biancuzzo"
Background: Provision of fortified juices may provide a convenient method to maintain and increase blood fat-soluble vitamins.
Objective: To determine whether children consuming orange juice fortified with calcium and combinations of vitamins D, E, and A could increase serum 25-hydroxyvitamin D [25(OH)D], α-tocopherol, and retinol levels.
Design: A 12-week randomized, double-blind, controlled trial.
Objective: The purpose of this study was to determine 1,25-dihydroxyvitamin D3 [1,25(OH)2D3] and 1,25-dihydroxyvitamin D2 [1,25(OH)2D2] levels in healthy adults consuming 1000 IU vitamin D2 or vitamin D3 per day for 11 weeks.
Subjects And Design: Blood from 34 healthy male and female adults, aged 18 to 79 years, from a placebo-controlled, double-blind study who received a placebo, 1000 IU vitamin D3, or 1000 IU vitamin D2 daily for 11 weeks at end of winter was analyzed. Serum levels of 25-hydroxyvitamin D2, 25-hydroxyvitamin D3, 1,25(OH)2D2, and 1,25(OH)2D3 were determined by liquid chromatography-tandem mass spectroscopy.
Vitamin D in adipose tissue and serum 25-hydroxyvitamin D after roux-en-Y gastric bypass.
Obesity (Silver Spring)
November 2011
Vitamin D is stored in body fat. The purpose of this study was to determine vitamin D concentration in abdominal fat of obese patients who underwent roux-en-Y gastric bypass (RYGB), and to describe changes in serum 25-hydroxyvitamin D (25(OH)D) levels in relation to loss of body fat. Subjects from a single clinic who were scheduled for RYGB were invited into the study.
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- The study aimed to compare how well vitamin D(2) and vitamin D(3) from fortified orange juice are absorbed in the body compared to supplements.
- Conducted with healthy adults, 64% started with low vitamin D levels, and the results showed no significant difference in vitamin D levels between those consuming orange juice versus supplements.
- The conclusion is that both forms of vitamin D are equally bioavailable whether taken in orange juice or capsules.
Context: Two reports suggested that vitamin D2 is less effective than vitamin D3 in maintaining vitamin D status.
Objective: Our objective was to determine whether vitamin D2 was less effective than vitamin D3 in maintaining serum 25-hydroxyvitamin D levels or increased the catabolism of 25-hydroxyvitamin D3.
Subjects And Design: This was a randomized, placebo-controlled, double-blinded study of healthy adults ages 18-84 yr who received placebo, 1000 IU vitamin D3, 1000 IU vitamin D2, or 500 IU vitamin D2 plus 500 IU vitamin D3 daily for 11 wk at the end of the winter.