Guest guest Posted November 10, 2005 Report Share Posted November 10, 2005 If you think about what people do, get in car drive to work short distance to the office door, they may not get a lot of vit d in the south either. Women wear makeup, men after-shave, clothed except hands and face. A lot of people in Texas don't go out in July's 90+ days. Hot as it is, I often wear a long sleeve shirt to protect against scratches, bugs, and a hat. And d is cheap, so the question is how much to take to "ensure vit d status"? And how much d, a fat soluble vit is in fat free milk? Is serum Ca+ a good indicator of "Vit d status". Regards. [ ] Vitamin D & Calcium "As long as vitamin D status is ensured, calcium intake levels of more than 800 mg/d may be unnecessary for maintaining calcium metabolism."Relationship Between Serum Parathyroid Hormone Levels, Vitamin D Sufficiency, and Calcium IntakeLaufey Steingrimsdottir, PhD; Orvar Gunnarsson, MD; Olafur S. Indridason, MD, MHS; Leifur Franzson, MSc, Pharm; Gunnar Sigurdsson, MD, PhDJAMA. 2005;294:2336-2341.Context Adequate vitamin D status for optimum bone health has received increased recognition in recent years; however, the ideal intake is not known. Serum 25-hydroxyvitamin D is the generally accepted indicator of vitamin D status, but no universal reference level has been reached.Objective To investigate the relative importance of high calcium intake and serum 25-hydroxyvitamin D for calcium homeostasis, as determined by serum intact parathyroid hormone (PTH).Design, Setting, and Participants Cross-sectional study of 2310 healthy Icelandic adults who were divided equally into 3 age groups (30-45 years, 50-65 years, or 70-85 years) and recruited from February 2001 to January 2003. They were administered a semi-quantitative food frequency questionnaire, which assessed vitamin D and calcium intake. Participants were further divided into groups according to calcium intake (<800 mg/d, 800-1200 mg/d, and >1200 mg/d) and serum 25-hydroxyvitamin D level (<10 ng/mL, 10-18 ng/mL, and >18 ng/mL).Main Outcome Measure Serum intact PTH as determined by calcium intake and vitamin D.Results A total of 944 healthy participants completed all parts of the study. After adjusting for relevant factors, serum PTH was lowest in the group with a serum 25-hydroxyvitamin D level of more than 18 ng/mL but highest in the group with a serum 25-hydroxyvitamin D level of less than 10 ng/mL. At the low serum 25-hydroxyvitamin D level (<10 ng/mL), calcium intake of less than 800 mg/d vs more than 1200 mg/d was significantly associated with higher serum PTH (P = .04); and at a calcium intake of more than 1200 mg/d, there was a significant difference between the lowest and highest vitamin D groups (P = .04).Conclusions As long as vitamin D status is ensured, calcium intake levels of more than 800 mg/d may be unnecessary for maintaining calcium metabolism. Vitamin D supplements are necessary for adequate vitamin D status in northern climates. Quote Link to comment Share on other sites More sharing options...
Guest guest Posted November 10, 2005 Report Share Posted November 10, 2005 If you think about what people do, get in car drive to work short distance to the office door, they may not get a lot of vit d in the south either. Women wear makeup, men after-shave, clothed except hands and face. A lot of people in Texas don't go out in July's 90+ days. Hot as it is, I often wear a long sleeve shirt to protect against scratches, bugs, and a hat. And d is cheap, so the question is how much to take to "ensure vit d status"? And how much d, a fat soluble vit is in fat free milk? Is serum Ca+ a good indicator of "Vit d status". Regards. [ ] Vitamin D & Calcium "As long as vitamin D status is ensured, calcium intake levels of more than 800 mg/d may be unnecessary for maintaining calcium metabolism."Relationship Between Serum Parathyroid Hormone Levels, Vitamin D Sufficiency, and Calcium IntakeLaufey Steingrimsdottir, PhD; Orvar Gunnarsson, MD; Olafur S. Indridason, MD, MHS; Leifur Franzson, MSc, Pharm; Gunnar Sigurdsson, MD, PhDJAMA. 2005;294:2336-2341.Context Adequate vitamin D status for optimum bone health has received increased recognition in recent years; however, the ideal intake is not known. Serum 25-hydroxyvitamin D is the generally accepted indicator of vitamin D status, but no universal reference level has been reached.Objective To investigate the relative importance of high calcium intake and serum 25-hydroxyvitamin D for calcium homeostasis, as determined by serum intact parathyroid hormone (PTH).Design, Setting, and Participants Cross-sectional study of 2310 healthy Icelandic adults who were divided equally into 3 age groups (30-45 years, 50-65 years, or 70-85 years) and recruited from February 2001 to January 2003. They were administered a semi-quantitative food frequency questionnaire, which assessed vitamin D and calcium intake. Participants were further divided into groups according to calcium intake (<800 mg/d, 800-1200 mg/d, and >1200 mg/d) and serum 25-hydroxyvitamin D level (<10 ng/mL, 10-18 ng/mL, and >18 ng/mL).Main Outcome Measure Serum intact PTH as determined by calcium intake and vitamin D.Results A total of 944 healthy participants completed all parts of the study. After adjusting for relevant factors, serum PTH was lowest in the group with a serum 25-hydroxyvitamin D level of more than 18 ng/mL but highest in the group with a serum 25-hydroxyvitamin D level of less than 10 ng/mL. At the low serum 25-hydroxyvitamin D level (<10 ng/mL), calcium intake of less than 800 mg/d vs more than 1200 mg/d was significantly associated with higher serum PTH (P = .04); and at a calcium intake of more than 1200 mg/d, there was a significant difference between the lowest and highest vitamin D groups (P = .04).Conclusions As long as vitamin D status is ensured, calcium intake levels of more than 800 mg/d may be unnecessary for maintaining calcium metabolism. Vitamin D supplements are necessary for adequate vitamin D status in northern climates. Quote Link to comment Share on other sites More sharing options...
Guest guest Posted May 11, 2009 Report Share Posted May 11, 2009 " Does anyone know if there is a certain formula, Vit. D to Calcium, that needs to be adhered to? " In The Netherlands 500 milligrams of calcium* is co-formulated with 400 IE of vitamine D3. For me, I have osteoporosis, it is recommended to take two of those a day. Regards, * So equivalent of 500 mg of real calcium, not like 500 mg calciumcarbonate. Quote Link to comment Share on other sites More sharing options...
Guest guest Posted May 11, 2009 Report Share Posted May 11, 2009 " Does anyone know if there is a certain formula, Vit. D to Calcium, that needs to be adhered to? " In The Netherlands 500 milligrams of calcium* is co-formulated with 400 IE of vitamine D3. For me, I have osteoporosis, it is recommended to take two of those a day. Regards, * So equivalent of 500 mg of real calcium, not like 500 mg calciumcarbonate. Quote Link to comment Share on other sites More sharing options...
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