A randomised comparison of increase in serum 25-hydroxyvitamin D concentration after 4 weeks of daily oral intake of 10 microg cholecalciferol from multivitamin tablets or fish oil capsules in healthy young adults.
Holvik K, Madar AA, Meyer HE, Lofthus CM, Stene LC.
Br J Nutr. 2007 Sep;98(3):620-5. Epub 2007 Apr 24.
PMID: 17456248
We conclude that fish oil capsules and multivitamin tablets containing 10 microg cholecalciferol administered over a 4-week period produced a similar mean increase in s-25(OH)D concentration.