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Matti Narkia

Vitamin D3 and 25-hydroxyvitamin D3 in raw and cooked pork cuts - ScienceDirect - Journ... - 0 views

    Vitamin D3 and 25-hydroxyvitamin D3 in raw and cooked pork cuts.
    Ina Clausen, Jette Jakobsen, Torben Leth and Lars Ovesen.
    Journal of Food Composition and Analysis
    Volume 16, Issue 5, October 2003, Pages 575-585

    Meat 25OHD3 contributes significantly to vitamin D activity. Food databases should include concentrations of both vitamin D and 25OHD.
Matti Narkia

Concentrations of vitamin D3 and 25-hydroxyvitamin D3 in raw and cooked New Zealand bee... - 0 views

    Concentrations of vitamin D3 and 25-hydroxyvitamin D3 in raw and cooked New Zealand beef and lamb.
    Roger Purchas, Maggie Zoua, Philip Pearcea and Felicity Jackson-
    Journal of Food Composition and Analysis
    Volume 20, Issue 2, March 2007, Pages 90-98

    For lamb, the highest levels of vitamin D3 were in the shoulder chop both before and after cooking, while levels were lowest in the rack muscle. Similar cut differences were shown for 25OHD3 concentrations. For beef there were no significant differences between the cuts for vitamin D3, but concentrations of 25OHD3 were lower in the striploin before and after cooking, Vitamin D3 levels tended to be higher in beef cuts than in lamb cuts, but the opposite held for 25OHD3. Concentrations of vitamin D3 were similar to those in other reports, but the 25OHD3 levels were at the high end of reported ranges. With 25OHD3 being more potent than vitamin D3, it is concluded that meat can make a useful contribution of this vitamin to the human diet.
Matti Narkia

Factors that Influence the Cutaneous Synthesis and Dietary Sources of Vitamin D - 0 views

    Factors that influence the cutaneous synthesis and dietary sources of vitamin D.
    Chen TC, Chimeh F, Lu Z, Mathieu J, Person KS, Zhang A, Kohn N, Martinello S, Berkowitz R, Holick MF.
    Arch Biochem Biophys. 2007 Apr 15;460(2):213-7. Epub 2007 Jan 8.
    PMID: 17254541
    doi: 10.1016/

    Vitamin D is rare in food. Among the vitamin D-rich food, oily fish are considered to be one of the best sources. Therefore, we analyzed the vitamin D content in several commonly consumed oily and non-oily fish. The data showed that farmed salmon had a mean content of vitamin D that was ~25% of the mean content found in wild caught salmon from Alaska, and that vitamin D2 was found in farmed salmon, but not in wild caught salmon. The results provide useful global guidelines for obtaining sufficient vitamin D3 by cutaneous synthesis and from dietary intake to prevent vitamin D deficiency and its health consequences.ensuing illness, especially, bone fractures in the elderly.
Matti Narkia

An Evaluation of the Vitamin D3 Content in Fish: Is the Vitamin D Content Adequate to S... - 0 views

    An evaluation of the vitamin D3 content in fish: Is the vitamin D content adequate to satisfy the dietary requirement for vitamin D?
    Lu Z, Chen TC, Zhang A, Persons KS, Kohn N, Berkowitz R, Martinello S, Holick MF.
    J Steroid Biochem Mol Biol. 2007 Mar;103(3-5):642-4. Epub 2007 Jan 30.
    PMID: 17267210
    doi: 10.1016/j.jsbmb.2006.12.010

    Surprisingly, farmed salmon had approximately 25% of the vitamin D content as wild salmon had. The vitamin D content in fish varied widely even within species. These data suggest that the tables that list the vitamin D content are out-of-date and need to be re-evaluated.

    Little is known about the effect of cooking on the vitamin D content in fish. When farm salmon was baked, almost all of the vitamin D content, i.e. 240 IU of vitamin D3 was recovered from 3.5 oz. of salmon. The initial concentration in the uncooked salmon was 245 IU of vitamin D3. However, when the salmon was fried in vegetable oil, approximately 50% (123 IU of vitamin D3 was recovered.)
    We also evaluated the vitamin D content in mackerel which is traditionally considered to be an excellent source of vitamin D3 because of its oily content. However, in the one sample that we tested, we only observed 24 IU of vitamin D3 in 3.5 oz.
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