Merja Karkkainen
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Explore the profile of Merja Karkkainen including associated specialties, affiliations and a list of published articles.
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10
Citations
208
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Recent Articles
1.
Saarnio E, Pekkinen M, Itkonen S, Kemi V, Karp H, Ivaska K, et al.
PLoS One
. 2018 Mar;
13(2):e0192596.
PMID: 29489840
Background: Studies have shown altered vitamin D metabolism in obesity. We assessed differences between obese and normal-weight subjects in total, free, and bioavailable 25-hydroxyvitamin D (25(OH)D, 25(OH)DFree, and 25(OH)DBio, respectively),...
2.
Islam M, Shamim A, Akhtaruzzaman M, Karkkainen M, Lamberg-Allardt C
J Health Popul Nutr
. 2015 Apr;
32(4):687-95.
PMID: 25895202
Elevated total cholesterol and low-density lipoprotein cholesterol in sera are both well-known risk factors of coronary heart disease. Adequate vitamin D status is important for optimal function of many organs...
3.
Viljakainen H, Palssa A, Karkkainen M, Jakobsen J, Lamberg-Allardt C
J Am Coll Nutr
. 2006 Oct;
25(5):429-35.
PMID: 17031013
Background: Vitamin D insufficiency poses a problem in many parts of the world, the elderly being an especially vulnerable group. This insufficiency results from an inadequate amount of sunshine and...
4.
Viljakainen H, Palssa A, Karkkainen M, Jakobsen J, Cashman K, Molgaard C, et al.
Br J Nutr
. 2006 Jul;
96(1):124-30.
PMID: 16870000
The importance of the seasonal variation of calcitropic hormones to growing skeleton has not been established. We studied whether there exists a seasonal variation in calcitropic hormones, bone mineral density...
5.
Viljakainen H, Natri A, Karkkainen M, Huttunen M, Palssa A, Jakobsen J, et al.
J Bone Miner Res
. 2006 Jun;
21(6):836-44.
PMID: 16753014
Unlabelled: The effect of vitamin D supplementation on bone mineral augmentation in 212 adolescent girls with adequate calcium intake was studied in a randomized placebo-controlled setting. Bone mineral augmentation determined...
6.
Narva M, Collin M, Lamberg-Allardt C, Karkkainen M, Poussa T, Vapaatalo H, et al.
Ann Nutr Metab
. 2004 Aug;
48(4):228-34.
PMID: 15334032
Background: Lactobacillus helveticus-fermented milk has been shown to increase calcium absorption compared to ordinary sour milk. In the present study the possible effect of L. helveticus-fermented milk on bone was...
7.
Cheng S, Tylavsky F, Kroger H, Karkkainen M, Lyytikainen A, Koistinen A, et al.
Am J Clin Nutr
. 2003 Aug;
78(3):485-92.
PMID: 12936933
Background: Very few studies have evaluated both parathyroid hormone (PTH) and 25-hydroxyvitamin D [25(OH)D] and their effects on bone mass in children. Objective: We studied the associations of serum 25(OH)D...
8.
Narva M, Karkkainen M, Poussa T, Lamberg-Allardt C, Korpela R
J Am Coll Nutr
. 2003 Feb;
22(1):88-93.
PMID: 12569119
Background: Caseinphosphopeptides (CPPs) are formed in food processing or during digestion in the gastrointestinal tract. CPPs prevent the formation of insoluble calcium salts; thus, the hypothesis is that CPPs increase...
9.
Vahteristo L, Kariluoto S, Barlund S, Karkkainen M, Lamberg-Allardt C, Salovaara H, et al.
Eur J Nutr
. 2002 Dec;
41(6):271-8.
PMID: 12474071
Background: Cereals contribute about a quarter of the daily folate intake from a typical diet in several European countries. However, studies on bioavailability of endogenous folates, in particular of cereal...
10.
Laaksonen M, Karkkainen M, Outila T, Vanninen T, Ray C, Lamberg-Allardt C
J Bone Miner Metab
. 2002 Nov;
20(6):383-90.
PMID: 12434167
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, but the role of individual...