- Serum 25-hydroxyvitamin D response to vitamin D supplementation using different lipid delivery systems in middle-aged and older adults: a randomised controlled trial
- Some olive oils decrease vitamin D absorption by 25 percent – March 2016
- Pinoresinol of olive oil decreases vitamin D intestinal absorption - Sept 2016
- Oil-based Vitamin D3 has the worst bioavailability – April 2014
- Nanoemulsion Vitamin D is faster and better - many studies
- Recall that some infants spit out Vitamin D in olive oil
Serum 25-hydroxyvitamin D response to vitamin D supplementation using different lipid delivery systems in middle-aged and older adults: a randomised controlled trial
Br J Nutr . 2023 Nov 14;130(9):1548-1557. doi: 10.1017/S0007114523000636
Aislinn F McCourt 1, Steven L Mulrooney 1, Graham J O'Neill 2, E Dolores O'Riordan 1, Aifric M O'Sullivan 1
Olive not as good as coconut if already have sufficient Vitamin D
Food fortification improves vitamin D intakes but is not yet mandated in many countries. Combining vitamin D with different dietary lipids altered vitamin D absorption in in vitro and postprandial studies. This randomised, placebo-controlled trial examined the effect of the lipid composition of a vitamin D-fortified dairy drink on change in 25-hydroxyvitamin D (25(OH)D) concentrations. Sixty-three healthy adults aged 50+ years were randomised to one of the following for 4 weeks: vitamin D-fortified olive oil dairy drink, vitamin D-fortified coconut oil dairy drink, vitamin D supplement or placebo control dairy drink. All vitamin D groups received 20 µg of vitamin D3 daily. Serum was collected at baseline and post-intervention to measure 25(OH)D concentrations and biomarkers of metabolic health. Repeated-measures general linear model ANCOVA (RM GLM ANCOVA) compared changes over time. There was a significant time × treatment interaction effect on 25(OH)D concentrations for those classified as vitamin D-insufficient (P < 0·001) and -sufficient at baseline (P = 0·004). 25(OH)D concentrations increased significantly for all insufficient participants receiving vitamin D3 in any form. However, for vitamin D-sufficient participants at baseline, 25(OH)D concentrations only increased significantly with the coconut oil dairy drink and supplement. There was no effect of vitamin D on biomarkers of metabolic health. Vitamin D fortification of lipid-containing foods may be used in lieu of supplementation when supplement adherence is low or for individuals with dysphagia. These results are important given the recent recommendation to increase vitamin D intakes to 15-20 µg for older adults in Ireland.
Download the PDF from Vitamin D Life
Some olive oils decrease vitamin D absorption by 25 percent – March 2016
Perhaps due to the pinoresinol in the oil
Pinoresinol of olive oil decreases vitamin D intestinal absorption - Sept 2016
Download the PDF from Vitamin D Life