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Can Vitamin D Supplements Help With Hypertension?

Q) One of my patients came in and said he had read that vitamin D supplementation will help with hypertension. Now he wants to quit his blood pressure meds and use vitamin D instead. Do you have any background on this?

Vitamin D is critical for utilization of calcium, a vital nutrient for multiple metabolic and cellular processes; deficiency is associated with worsening of autoimmune disorders, osteoporosis, and certain cardiovascular conditions, among others.7 An association between vitamin D level and blood pressure has been recognized for some time, but the pathophysiology is not well understood.

A literature review of studies from 1988 to 2013 found contradictory results regarding vitamin D deficiency and concurrent elevated blood pressure (systolic and/or diastolic), as well as the impact on blood pressure with restoration of vitamin D levels. The findings were limited by several factors, including differences in study design, variables evaluated, and type of vitamin D compound used. The results suggested a link between the renin-angiotensin-aldosterone system, fibroblast growth factor 23/klotho axis, and vitamin D level.8

A study of 158 subjects (98 with newly diagnosed essential hypertension, 60 with normal blood pressure) found significantly lower 25(OH)D3 serum levels in hypertensive patients. Furthermore, the 25(OH)D3 level was significantly correlated with both systolic (r = –0.33) and diastolic blood pressure (r = –0.26). Using multiple regression analysis, after adjustment for age, smoking status, and BMI, the impact of 25(OH)D3 level accounted for 10% of the variation in systolic blood pressure.9

In a mendelian randomization study of 108,173 subjects from 35 studies, an inverse association between vitamin D level and systolic blood pressure (P = .0003) was found. A reduced risk for essential hypertension with increased vitamin D level (P = .0003) was also noted. However, no association was found between increasing vitamin D level and a reduction in diastolic blood pressure
(P = .37).10

With the ever-increasing access to health information from sources such as “Doctor Google,” it can be difficult for a non–health care professional to separate hype from evidence-based recommendations. While current evidence suggests optimal vitamin D levels may be beneficial for improving blood pressure control and may be a useful adjunctive therapy, there is no evidence to support discontinuing antihypertensive therapy and replacing it with vitamin D therapy.

Cynthia A. Smith, DNP, APRN, FNP-BC
Renal Consultants, South Charleston, West Virginia

REFERENCES
1. Monfared A, Heidarzadeh A, Ghaffari M, Akbarpour M. Effect of megestrol acetate on serum albumin level in malnourished dialysis patients. J Renal Nutr. 2009;19(2):167-171.
2. Byham-Gray L, Stover J, Wiesen K. A clinical guide to nutrition care in kidney disease. Acad Nutr Diet. 2013.
3. White JV, Guenter P, Jensen G, Malone A, Schofield M; Academy of Nutrition and Dietetics Malnutrition Work Group; ASPEN Malnutrition Task Force; ASPEN Board of Directors. Consensus statement of the Academy of Nutrition and Dietetics/American Society for Parenteral and Enteral Nutrition: characteristics recommended for the identification and documentation of adult malnutrition (undernutrition)  [erratum appears in J Acad Nutr Diet. 2012 Nov;112(11):1899].
J Acad Nutr Diet. 2012;112(5):730-738.
4. Rammohan M, Kalantar-Zedeh K, Liang A, Ghossein C. Megestrol acetate in a moderate dose for the treatment of malnutrition-inflammation complex in maintenance dialysis patients. J Ren Nutr. 2005;15(3):345-355.
5. Yeh S, Marandi M, Thode H Jr, et al. Report of a pilot, double blind, placebo-controlled study of megestrol acetate in elderly dialysis patients with cachexia. J Ren Nutr. 2010; 20(1):52-62.
6. Golebiewska JE, Lichodziejewska-Niemierko M, Aleksandrowicz-Wrona E, et al. Megestrol acetate use in hypoalbuminemic dialysis patients [comment]. J Ren Nutr. 2011;21(2): 200-202.
7. Bendik I, Friedel A, Roos FF, et al. Vitamin D: a critical and necessary micronutrient for human health. Front Physiol. 2014;5:248.
8. Cabone F, Mach F, Vuilleumier N, Montecucco F. Potential pathophysiological role for the vitamin D deficiency in essential hypertension. World J Cardiol. 2014;6(5):260-276. 
9. Sypniewska G, Pollak J, Strozecki P, et al. 25-hydroxyvitamin D, biomarkers of endothelial dysfunction and subclinical organ damage in adults with hypertension. Am J Hypertens. 2014;27(1):114-121. 
10. Vimaleswaran KS, Cavadino A, Berry DJ, et al. Association of vitamin D status with arterial blood pressure and hypertension risk:  a mendelian randomisation study. Lancet Diabetes Endocrinol. 2014;2(9):719-729.

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Renal Consult is edited by Jane S. Davis, CRNP, DNP, a member of the Clinician Reviews editorial board, who is a nurse practitioner in the Division of Nephrology at the University of Alabama at Birmingham and is the communications chairperson for the National Kidney Foundation’s Council of Advanced Practitioners (NKF-CAP); and Kim Zuber, PA-C, MSPS, DFAAPA, who is a physician assistant with Metropolitan Nephrology in Alexandria, Virginia, and Clinton, Maryland; she is also past chair of the NKF-CAP. This month’s responses were authored by Luanne DiGuglielmo, MS, RD, CSR, who practices at DaVita Summit Renal Center in Mountainside, New Jersey, and is the Clinical Coordinator for the Dietetic Internship at the College of Saint Elizabeth in Morristown, New Jersey, and Cynthia A. Smith, DNP, APRN, FNP-BC, who practices at Renal Consultants, South Charleston, West Virginia.

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Renal Consult is edited by Jane S. Davis, CRNP, DNP, a member of the Clinician Reviews editorial board, who is a nurse practitioner in the Division of Nephrology at the University of Alabama at Birmingham and is the communications chairperson for the National Kidney Foundation’s Council of Advanced Practitioners (NKF-CAP); and Kim Zuber, PA-C, MSPS, DFAAPA, who is a physician assistant with Metropolitan Nephrology in Alexandria, Virginia, and Clinton, Maryland; she is also past chair of the NKF-CAP. This month’s responses were authored by Luanne DiGuglielmo, MS, RD, CSR, who practices at DaVita Summit Renal Center in Mountainside, New Jersey, and is the Clinical Coordinator for the Dietetic Internship at the College of Saint Elizabeth in Morristown, New Jersey, and Cynthia A. Smith, DNP, APRN, FNP-BC, who practices at Renal Consultants, South Charleston, West Virginia.

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Clinician Reviews in partnership with

Renal Consult is edited by Jane S. Davis, CRNP, DNP, a member of the Clinician Reviews editorial board, who is a nurse practitioner in the Division of Nephrology at the University of Alabama at Birmingham and is the communications chairperson for the National Kidney Foundation’s Council of Advanced Practitioners (NKF-CAP); and Kim Zuber, PA-C, MSPS, DFAAPA, who is a physician assistant with Metropolitan Nephrology in Alexandria, Virginia, and Clinton, Maryland; she is also past chair of the NKF-CAP. This month’s responses were authored by Luanne DiGuglielmo, MS, RD, CSR, who practices at DaVita Summit Renal Center in Mountainside, New Jersey, and is the Clinical Coordinator for the Dietetic Internship at the College of Saint Elizabeth in Morristown, New Jersey, and Cynthia A. Smith, DNP, APRN, FNP-BC, who practices at Renal Consultants, South Charleston, West Virginia.

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Q) One of my patients came in and said he had read that vitamin D supplementation will help with hypertension. Now he wants to quit his blood pressure meds and use vitamin D instead. Do you have any background on this?

Vitamin D is critical for utilization of calcium, a vital nutrient for multiple metabolic and cellular processes; deficiency is associated with worsening of autoimmune disorders, osteoporosis, and certain cardiovascular conditions, among others.7 An association between vitamin D level and blood pressure has been recognized for some time, but the pathophysiology is not well understood.

A literature review of studies from 1988 to 2013 found contradictory results regarding vitamin D deficiency and concurrent elevated blood pressure (systolic and/or diastolic), as well as the impact on blood pressure with restoration of vitamin D levels. The findings were limited by several factors, including differences in study design, variables evaluated, and type of vitamin D compound used. The results suggested a link between the renin-angiotensin-aldosterone system, fibroblast growth factor 23/klotho axis, and vitamin D level.8

A study of 158 subjects (98 with newly diagnosed essential hypertension, 60 with normal blood pressure) found significantly lower 25(OH)D3 serum levels in hypertensive patients. Furthermore, the 25(OH)D3 level was significantly correlated with both systolic (r = –0.33) and diastolic blood pressure (r = –0.26). Using multiple regression analysis, after adjustment for age, smoking status, and BMI, the impact of 25(OH)D3 level accounted for 10% of the variation in systolic blood pressure.9

In a mendelian randomization study of 108,173 subjects from 35 studies, an inverse association between vitamin D level and systolic blood pressure (P = .0003) was found. A reduced risk for essential hypertension with increased vitamin D level (P = .0003) was also noted. However, no association was found between increasing vitamin D level and a reduction in diastolic blood pressure
(P = .37).10

With the ever-increasing access to health information from sources such as “Doctor Google,” it can be difficult for a non–health care professional to separate hype from evidence-based recommendations. While current evidence suggests optimal vitamin D levels may be beneficial for improving blood pressure control and may be a useful adjunctive therapy, there is no evidence to support discontinuing antihypertensive therapy and replacing it with vitamin D therapy.

Cynthia A. Smith, DNP, APRN, FNP-BC
Renal Consultants, South Charleston, West Virginia

REFERENCES
1. Monfared A, Heidarzadeh A, Ghaffari M, Akbarpour M. Effect of megestrol acetate on serum albumin level in malnourished dialysis patients. J Renal Nutr. 2009;19(2):167-171.
2. Byham-Gray L, Stover J, Wiesen K. A clinical guide to nutrition care in kidney disease. Acad Nutr Diet. 2013.
3. White JV, Guenter P, Jensen G, Malone A, Schofield M; Academy of Nutrition and Dietetics Malnutrition Work Group; ASPEN Malnutrition Task Force; ASPEN Board of Directors. Consensus statement of the Academy of Nutrition and Dietetics/American Society for Parenteral and Enteral Nutrition: characteristics recommended for the identification and documentation of adult malnutrition (undernutrition)  [erratum appears in J Acad Nutr Diet. 2012 Nov;112(11):1899].
J Acad Nutr Diet. 2012;112(5):730-738.
4. Rammohan M, Kalantar-Zedeh K, Liang A, Ghossein C. Megestrol acetate in a moderate dose for the treatment of malnutrition-inflammation complex in maintenance dialysis patients. J Ren Nutr. 2005;15(3):345-355.
5. Yeh S, Marandi M, Thode H Jr, et al. Report of a pilot, double blind, placebo-controlled study of megestrol acetate in elderly dialysis patients with cachexia. J Ren Nutr. 2010; 20(1):52-62.
6. Golebiewska JE, Lichodziejewska-Niemierko M, Aleksandrowicz-Wrona E, et al. Megestrol acetate use in hypoalbuminemic dialysis patients [comment]. J Ren Nutr. 2011;21(2): 200-202.
7. Bendik I, Friedel A, Roos FF, et al. Vitamin D: a critical and necessary micronutrient for human health. Front Physiol. 2014;5:248.
8. Cabone F, Mach F, Vuilleumier N, Montecucco F. Potential pathophysiological role for the vitamin D deficiency in essential hypertension. World J Cardiol. 2014;6(5):260-276. 
9. Sypniewska G, Pollak J, Strozecki P, et al. 25-hydroxyvitamin D, biomarkers of endothelial dysfunction and subclinical organ damage in adults with hypertension. Am J Hypertens. 2014;27(1):114-121. 
10. Vimaleswaran KS, Cavadino A, Berry DJ, et al. Association of vitamin D status with arterial blood pressure and hypertension risk:  a mendelian randomisation study. Lancet Diabetes Endocrinol. 2014;2(9):719-729.

Q) One of my patients came in and said he had read that vitamin D supplementation will help with hypertension. Now he wants to quit his blood pressure meds and use vitamin D instead. Do you have any background on this?

Vitamin D is critical for utilization of calcium, a vital nutrient for multiple metabolic and cellular processes; deficiency is associated with worsening of autoimmune disorders, osteoporosis, and certain cardiovascular conditions, among others.7 An association between vitamin D level and blood pressure has been recognized for some time, but the pathophysiology is not well understood.

A literature review of studies from 1988 to 2013 found contradictory results regarding vitamin D deficiency and concurrent elevated blood pressure (systolic and/or diastolic), as well as the impact on blood pressure with restoration of vitamin D levels. The findings were limited by several factors, including differences in study design, variables evaluated, and type of vitamin D compound used. The results suggested a link between the renin-angiotensin-aldosterone system, fibroblast growth factor 23/klotho axis, and vitamin D level.8

A study of 158 subjects (98 with newly diagnosed essential hypertension, 60 with normal blood pressure) found significantly lower 25(OH)D3 serum levels in hypertensive patients. Furthermore, the 25(OH)D3 level was significantly correlated with both systolic (r = –0.33) and diastolic blood pressure (r = –0.26). Using multiple regression analysis, after adjustment for age, smoking status, and BMI, the impact of 25(OH)D3 level accounted for 10% of the variation in systolic blood pressure.9

In a mendelian randomization study of 108,173 subjects from 35 studies, an inverse association between vitamin D level and systolic blood pressure (P = .0003) was found. A reduced risk for essential hypertension with increased vitamin D level (P = .0003) was also noted. However, no association was found between increasing vitamin D level and a reduction in diastolic blood pressure
(P = .37).10

With the ever-increasing access to health information from sources such as “Doctor Google,” it can be difficult for a non–health care professional to separate hype from evidence-based recommendations. While current evidence suggests optimal vitamin D levels may be beneficial for improving blood pressure control and may be a useful adjunctive therapy, there is no evidence to support discontinuing antihypertensive therapy and replacing it with vitamin D therapy.

Cynthia A. Smith, DNP, APRN, FNP-BC
Renal Consultants, South Charleston, West Virginia

REFERENCES
1. Monfared A, Heidarzadeh A, Ghaffari M, Akbarpour M. Effect of megestrol acetate on serum albumin level in malnourished dialysis patients. J Renal Nutr. 2009;19(2):167-171.
2. Byham-Gray L, Stover J, Wiesen K. A clinical guide to nutrition care in kidney disease. Acad Nutr Diet. 2013.
3. White JV, Guenter P, Jensen G, Malone A, Schofield M; Academy of Nutrition and Dietetics Malnutrition Work Group; ASPEN Malnutrition Task Force; ASPEN Board of Directors. Consensus statement of the Academy of Nutrition and Dietetics/American Society for Parenteral and Enteral Nutrition: characteristics recommended for the identification and documentation of adult malnutrition (undernutrition)  [erratum appears in J Acad Nutr Diet. 2012 Nov;112(11):1899].
J Acad Nutr Diet. 2012;112(5):730-738.
4. Rammohan M, Kalantar-Zedeh K, Liang A, Ghossein C. Megestrol acetate in a moderate dose for the treatment of malnutrition-inflammation complex in maintenance dialysis patients. J Ren Nutr. 2005;15(3):345-355.
5. Yeh S, Marandi M, Thode H Jr, et al. Report of a pilot, double blind, placebo-controlled study of megestrol acetate in elderly dialysis patients with cachexia. J Ren Nutr. 2010; 20(1):52-62.
6. Golebiewska JE, Lichodziejewska-Niemierko M, Aleksandrowicz-Wrona E, et al. Megestrol acetate use in hypoalbuminemic dialysis patients [comment]. J Ren Nutr. 2011;21(2): 200-202.
7. Bendik I, Friedel A, Roos FF, et al. Vitamin D: a critical and necessary micronutrient for human health. Front Physiol. 2014;5:248.
8. Cabone F, Mach F, Vuilleumier N, Montecucco F. Potential pathophysiological role for the vitamin D deficiency in essential hypertension. World J Cardiol. 2014;6(5):260-276. 
9. Sypniewska G, Pollak J, Strozecki P, et al. 25-hydroxyvitamin D, biomarkers of endothelial dysfunction and subclinical organ damage in adults with hypertension. Am J Hypertens. 2014;27(1):114-121. 
10. Vimaleswaran KS, Cavadino A, Berry DJ, et al. Association of vitamin D status with arterial blood pressure and hypertension risk:  a mendelian randomisation study. Lancet Diabetes Endocrinol. 2014;2(9):719-729.

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Can Vitamin D Supplements Help With Hypertension?
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