Search Results - "KÄRKKÄINEN, Merja"

High phosphorus intakes acutely and negatively affect Ca and bone metabolism in a dose-dependent manner in healthy young females by Kemi, Virpi E., Kärkkäinen, Merja U. M., Lamberg-Allardt, Christel J. E.

“…Ca and P are both essential nutrients for bone and are known to affect one of the most important regulators of bone metabolism, parathyroid hormone (PTH). Too…”
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Prevalence of vitamin D deficiency and secondary hyperparathyroidism during winter in pre-menopausal Bangladeshi and Somali immigrant and ethnic Finnish women: associations with forearm bone mineral density by Islam, Md Zahirul, Viljakainen, Heli T., Kärkkäinen, Merja U. M., Saarnio, Elisa, Laitinen, Kalevi, Lamberg-Allardt, Christel

“…Secondary hyperparathyroidism (SHPT) is one of the outcomes of vitamin D deficiency that negatively affects bone metabolism. We studied the ethnic differences…”
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Development and validation of an interview-administered FFQ for assessment of vitamin D and calcium intakes in Finnish women by Itkonen, Suvi T, Erkkola, Maijaliisa, Skaffari, Essi, Saaristo, Pilvi, Saarnio, Elisa M, Viljakainen, Heli T, Kärkkäinen, Merja U M, Lamberg-Allardt, Christel J E

“…Increased vitamin D fortification of dairy products has increased the supply of vitamin D-containing products with different vitamin D contents on the market…”
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Low free 25-hydroxyvitamin D and high vitamin D binding protein and parathyroid hormone in obese Caucasians. A complex association with bone? by Saarnio, Elisa, Pekkinen, Minna, Itkonen, Suvi T, Kemi, Virpi, Karp, Heini, Ivaska, Kaisa K, Risteli, Juha, Koivula, Marja-Kaisa, Kärkkäinen, Merja, Mäkitie, Outi, Sievänen, Harri, Lamberg-Allardt, Christel

“…Studies have shown altered vitamin D metabolism in obesity. We assessed differences between obese and normal-weight subjects in total, free, and bioavailable…”
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Bread fortified with cholecalciferol increases the serum 25-hydroxyvitamin D concentration in women as effectively as a cholecalciferol supplement by Natri, Anna-Mari, Salo, Pirjo, Vikstedt, Tiina, Palssa, Anette, Huttunen, Minna, Kärkkäinen, Merja U M, Salovaara, Hannu, Piironen, Vieno, Jakobsen, Jette, Lamberg-Allardt, Christel J

“…Fortification of foods is a feasible way of preventing low vitamin D status. Bread could be a suitable vehicle for fortification because it is a common part of…”
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Habitual high phosphorus intakes and foods with phosphate additives negatively affect serum parathyroid hormone concentration: a cross-sectional study on healthy premenopausal women by Kemi, Virpi E, Rita, Hannu J, Kärkkäinen, Merja UM, Viljakainen, Heli T, Laaksonen, Marika M, Outila, Terhi A, Lamberg-Allardt, Christel JE

“…Foods can contain natural phosphorus (NP) and phosphate-containing food additives (AP). The main objective of the present study was to investigate whether NP…”
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A Positive Dose–Response Effect of Vitamin D Supplementation on Site‐Specific Bone Mineral Augmentation in Adolescent Girls: A Double‐Blinded Randomized Placebo‐Controlled 1‐Year Intervention by Viljakainen, Heli T, Natri, Anna‐Mari, Kärkkäinen, Merja, Huttunen, Minna M, Palssa, Anette, Jakobsen, Jette, Cashman, Kevin D, Mølgaard, Christian, Lamberg‐Allardt, Christel

“…The effect of vitamin D supplementation on bone mineral augmentation in 212 adolescent girls with adequate calcium intake was studied in a randomized…”
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Calcium intake in health maintenance - a systematic review by Uusi-Rasi, Kirsti, Kärkkäinen, Merja U. M., Lamberg-Allardt, Christel J. E.

“…Calcium (Ca) is an essential nutrient for the human body. Despite lively research, there is uncertainty about Ca requirements in terms of desirable health…”
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Mono- and polyphosphates have similar effects on calcium and phosphorus metabolism in healthy young women by Karp, Heini J., Kemi, Virpi E., Lamberg-Allardt, Christel J. E., Kärkkäinen, Merja U. M.

“…Purpose Phosphate (Pi) salts, often mono- (MP) or polyphosphates (PP), are commonly used as additives in the food industry. Previous studies have shown that…”
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Increased calcium intake does not completely counteract the effects of increased phosphorus intake on bone: an acute dose–response study in healthy females by Kemi, Virpi E., Kärkkäinen, Merja U. M., Karp, Heini J., Laitinen, Kalevi A. E., Lamberg-Allardt, Christel J. E.

“…A high dietary P intake is suggested to have negative effects on bone through increased parathyroid hormone secretion, as high serum parathyroid hormone…”
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Vitamin D Deficiency and Bone Health in Healthy Adults in Finland: Could This Be a Concern in Other Parts of Europe? by Lamberg‐Allardt, Christel J. E., Outila, Terhi A., Kärkkäinen, Merja U. M., Rita, Hannu J., Valsta, Liisa M.

“…A low vitamin D status could be a concern not only in children and the elderly in Europe, but also in adults. We do not know the effect of mild vitamin D…”
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Associations of genetic lactase non-persistence and sex with bone loss in young adulthood by Laaksonen, Marika M.L, Impivaara, Olli, Sievänen, Harri, Viikari, Jorma S.A, Lehtimäki, Terho J, Lamberg-Allardt, Christel J.E, Kärkkäinen, Merja U.M, Välimäki, Matti, Heikkinen, Jorma, Kröger, Liisa M, Kröger, Heikki P.J, Jurvelin, Jukka S, Kähönen, Mika A.P, Raitakari, Olli T

“…Abstract Some studies have reported that after attainment of peak bone mass (PBM), slow bone loss may occur in both men and women; however, findings are…”
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Polycontextuality and Boundary Crossing in Expert Cognition: Learning and Problem Solving in Complex Work Activities by Engestrom, Yrjo

“…Two features of a new horizontal conceptualization of expertise are explored. Polycontextuality refers to the multiple ongoing tasks apparent in expert work,…”
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Low calcium:phosphorus ratio in habitual diets affects serum parathyroid hormone concentration and calcium metabolism in healthy women with adequate calcium intake by Kemi, Virpi E., Kärkkäinen, Merja U. M., Rita, Hannu J., Laaksonen, Marika M. L., Outila, Terhi A., Lamberg-Allardt, Christel J. E.

“…Excessive dietary P intake alone can be deleterious to bone through increased parathyroid hormone (PTH) secretion, but adverse effects on bone increase when…”
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A seasonal variation of calcitropic hormones, bone turnover and bone mineral density in early and mid-puberty girls – a cross-sectional study by Viljakainen, Heli T., Palssa, Anette, Kärkkäinen, Merja, Jakobsen, Jette, Cashman, Kevin D., Mølgaard, Christian, Lamberg-Allardt, Christel

“…The importance of the seasonal variation of calcitropic hormones to growing skeleton has not been established. We studied whether there exists a seasonal…”
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Associations among total and food additive phosphorus intake and carotid intima-media thickness--a cross-sectional study in a middle-aged population in Southern Finland by Itkonen, Suvi T, Karp, Heini J, Kemi, Virpi E, Kokkonen, Elina M, Saarnio, Elisa M, Pekkinen, Minna H, Kärkkäinen, Merja U M, Laitinen, E Kalevi A, Turanlahti, Maila I, Lamberg-Allardt, Christel J E

“…Dietary phosphorus (P) intake in Western countries is 2- to 3-fold higher than recommended, and phosphate is widely used as a food additive in eg. cola…”
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Bone mineral density measured by dual‐energy X‐ray absorptiometry and novel markers of bone formation and resorption in patients on antiepileptic drugs by Välimäki, Matti J., Tiihonen, Mikko, Laitinen, Kalevi, Tähtelä, Riitta, Kärkkäinen, Merja, Lamberg‐Allardt, Christel, Mäkelä, Pekka, Tunninen, Riitta

“…In patients on antiepileptic drugs, bone loss has been mainly demonstrated at radial sites using old technology and has been ascribed to drug‐induced vitamin D…”
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Vitamin D status affects serum parathyroid hormone concentrations during winter in female adolescents: associations with forearm bone mineral density by OUTILA, Terhi A, KÄRKKÄINEN, Merja U. M, LAMBERG-ALLARDT, Christel J. E

“…Vitamin D deficiency leads to secondary hyperparathyroidism, which has a negative effect on bone metabolism in the elderly. Puberty is an important time of…”
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Dietary phosphorus intake is negatively associated with bone formation among women and positively associated with some bone traits among men—a cross-sectional study in middle-aged Caucasians by Itkonen, Suvi T., Rita, Hannu J., Saarnio, Elisa M., Kemi, Virpi E., Karp, Heini J., Kärkkäinen, Merja U.M., Pekkinen, Minna H., Laitinen, E. Kalevi, Risteli, Juha, Koivula, Marja-Kaisa, Sievänen, Harri, Lamberg-Allardt, Christel J.E.

“…High dietary phosphorus (P) intake has acute negative effects on calcium (Ca) and bone metabolism, but long-term clinical data are contradictory. We…”
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Vitamin D receptor gene BsmI-polymorphism in Finnish premenopausal and postmenopausal women: its association with bone mineral density, markers of bone turnover, and intestinal calcium absorption, with adjustment for lifestyle factors by Laaksonen, Marika, Kärkkäinen, Merja, Outila, Terhi, Vanninen, Tarja, Ray, Carola, Lamberg-Allardt, Christel

“…Bone mineral density (BMD) is regulated by genetic and environmental factors. Sixty percent to 80% of bone mass is suggested to be under polygenetic control,…”
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