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Matti Narkia

Association of low 25-hydroxyvitamin D concentrations with elevated parathyroid hormone... - 0 views

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    Association of low 25-hydroxyvitamin D concentrations with elevated parathyroid hormone concentrations and low cortical bone density in early pubertal and prepubertal Finnish girls.
    Cheng S, Tylavsky F, Kröger H, Kärkkäinen M, Lyytikäinen A, Koistinen A, Mahonen A, Alen M, Halleen J, Väänänen K, Lamberg-Allardt C.
    Am J Clin Nutr. 2003 Sep;78(3):485-92. Erratum in: Am J Clin Nutr. 2006 Jan;83(1):174.
    PMID: 12936933

    CONCLUSIONS: Vitamin D-deficient girls have low cortical BMD and high iPTH concentrations, which are consistent with secondary hyperparathyroidism. A low vitamin D concentration accompanied by high bone resorption (TRAP 5b) may limit the accretion of bone mass in young girls.
Matti Narkia

Low serum 25-hydroxyvitamin D concentrations and secondary hyperparathyroidism in middl... - 0 views

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    Low serum 25-hydroxyvitamin D concentrations and secondary hyperparathyroidism in middle-aged white strict vegetarians.
    Lamberg-Allardt C, Kärkkäinen M, Seppänen R, Biström H.
    Am J Clin Nutr. 1993 Nov;58(5):684-9.
    PMID: 8237875

    In conclusion, white strict vegetarians are at risk of vitamin D deficiency, at least in the winter, primarily because of a low dietary vitamin D intake, despite a normal sunlight exposure in summer. Low serum 25(OH)D concentrations are accompanied by high S-iPTH concentrations, which also are affected by a low calcium intake. The effect of these changes on bone health remains to be evaluated.
Matti Narkia

Healthy elderly French women living at home have secondary hyperparathyroidism and high... - 0 views

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    Healthy elderly French women living at home have secondary hyperparathyroidism and high bone turnover in winter. EPIDOS Study Group.
    Chapuy MC, Schott AM, Garnero P, Hans D, Delmas PD, Meunier PJ.
    J Clin Endocrinol Metab. 1996 Mar;81(3):1129-33.
    PMID: 8772587

    These results show that vitamin D status of a French aged population in good health and living at home depends mainly on lifestyle. Like institutionalized women, old women living at home exhibit clear evidence of senile hyperparathyroidism in the winter, secondary in part to a reduced 25OHD level and associated with biological signs of increased bone turnover. The maintenance of PTH within the normal range for healthy adults by vitamin D and calcium treatment might constitute an approach for the prevention of bone loss in the entire
Matti Narkia

A high prevalence of hypovitaminosis D in Finnish medical in- and outpatients. - J Inte... - 0 views

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    A high prevalence of hypovitaminosis D in Finnish medical in- and outpatients.
    Kauppinen-Mäkelin R, Tähtelä R, Löyttyniemi E, Kärkkäinen J, Välimäki MJ.
    J Intern Med. 2001 Jun;249(6):559-63.
    PMID: 11422663
    DOI: 10.1046/j.1365-2796.2001.00847.x

    CONCLUSION: Hypovitaminosis D is very common amongst Finnish in- and outpatients in both sexes, causing secondary hyperparathyroidism in females. More extensive studies are warranted to elucidate the vitamin D status of the Finnish population.
Matti Narkia

Age-Related Changes in the 25-Hydroxyvitamin D Versus Parathyroid Hormone Relationship ... - 0 views

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    Age-related changes in the 25-hydroxyvitamin D versus parathyroid hormone relationship suggest a different reason why older adults require more vitamin D.
    Vieth R, Ladak Y, Walfish PG.
    J Clin Endocrinol Metab. 2003 Jan;88(1):185-91.
    PMID: 12519850

    This study shows that all age groups exhibit a high prevalence of 25(OH)D insufficiency and secondary hyperparathyroidism. Older adults are just as efficient in maintaining 25(OH)D, but they need more vitamin D to produce the higher 25(OH)D concentrations required to overcome the hyperparathyroidism associated with their diminishing renal function
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