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Nutrition Society Medal Lecture: The role of the skeleton in acid—base homeostasis

Published online by Cambridge University Press:  27 March 2009

Susan A. New*
Affiliation:
Centre for Nutrition and Food Safety, School of Biomedical & Life Sciences, University of Surrey, Guildford, Surrey GU2 7XH, UK
*
Dr Susan New, fax +44 1483 576978, email [email protected]
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Abstract

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Nutritional strategies for optimising bone health throughout the life cycle are extremely important, since a dietary approach is more popular amongst osteoporosis sufferers than drug intervention, and long-term drug treatment compliance is relatively poor. As an exogenous factor, nutrition is amenable to change and has relevant public health implications. With the growing increase in life expectancy, hip fractures are predicted to rise dramatically in the next decade, and hence there is an urgent need for the implementation of public health strategies to target prevention of poor skeletal health on a population-wide basis. The role that the skeleton plays in acid-base homeostasis has been gaining increasing prominence in the literature; with theoretical considerations of the role alkaline bone mineral may play in the defence against acidosis dating as far back as the late 19th century. Natural, pathological and experimental states of acid loading and/or acidosis have been associated with hypercalciuria and negative Ca balance and, more recently, the detrimental effects of ‘acid’ from the diet on bone mineral have been demonstrated. At the cellular level, a reduction in extracellular pH has been shown to have a direct enhancement on osteoclastic activity, with the result of increased resorption pit formation in bone. A number of observational, experimental, clinical and intervention studies over the last decade have suggested a positive link between fruit and vegetable consumption and the skeleton. Further research is required, particularly with regard to the influence of dietary manipulation using alkali-forming foods on fracture prevention. Should the findings prove conclusive, a “fruit and vegetable” approach to bone health maintenance may provide a very sensible (and natural) alternative therapy for osteoporosis treatment, which is likely to have numerous additional health-related benefits.

Type
University of Sheffield, UK, 10–12 July 2001
Copyright
Copyright © The Nutrition Society 2002

References

Albright, F & Reifenstein, EC Jr (1948) The Parathyroid Glands and Metabolic Bone Disease, pp. 241247. Baltimore, MD: Williams and Wilkins.Google Scholar
Appel, LJ, Moore, TJ, Obarzanek, E, Vallmer, WM, Svetkey, LP, Sacks, FM, Bray, GA, Vogt, TM & Cutler, JA (1997) A clinical trial of the effects of dietary patterns on blood pressure New England Journal of Medicine 336, 11171124.CrossRefGoogle ScholarPubMed
Arnett, TR, Boyde, A, Jones, SL & Taylor, ML (1994) Effects of medium acidification by alteration of carbon dioxide or bicarbonate concentrations on the resorptive activity of rat osteoclasts. Journal of Bone and Mineral Research 9, 375379.CrossRefGoogle ScholarPubMed
Arnett, TR & Dempster, DW (1986) Effect of pH on bone resorption by rat osteoclasts in vitro. Endocrinology 119, 119124.CrossRefGoogle Scholar
Arnett, TR & Dempster, DW (1990) Perspectives: protons and osteoclasts. Journal of Bone and Mineral Research 5, 10991103.CrossRefGoogle Scholar
Arnett, TR & Spowage, M (1996) Modulation of the resorptive activity of rat osteoclasts by small changes in extracellular pH near the physiological range. Bone 18, 277279.CrossRefGoogle ScholarPubMed
Barzel, US (1969) The effect of excessive acid feeding on bone. Calcified Tissue Research 4, 94100.CrossRefGoogle ScholarPubMed
Barzel, US (editor) (1970) The role of bone in acid-base metabolism. In Osteoporosis, pp. 199206. New York: Grune & Stratton.Google ScholarPubMed
Barzel, US (1995) The skeleton as an ion exchange system: implications for the role of acid-base imbalance in the genesis of osteoporosis. Journal of Bone and Mineral Research 10, 14311436.CrossRefGoogle ScholarPubMed
Barzel, US (1996) Ne'ertheless, an acidogenic diet may impair bone (letter). Journal of Bone and Mineral Research 11,704.CrossRefGoogle Scholar
Barzel, US (1997) Dietary patterns and blood pressure (letter). New England Journal of Medicine 337, 637.Google Scholar
Barzel, US & Massey, LK (1998) Excess dietary protein can adversely affect bone. Journal of Nutrition 128, 10511053.CrossRefGoogle ScholarPubMed
Bernstein, DS, Wachman, A & Hattner, RS (1970) Acid-base balance in metabolic bone disease. In Osteoporosis, pp. 207216 [Barzel, US, editor]. New York: Grune & Stratton.Google Scholar
Buclin, T, Cosma, M, Appenzeller, M, Jacquet, AF, Decosterd, LA, Biollaz, J & Burckhardt, P (2001) Diet acids and alkalis influence calcium retention on bone. Osteoporosis International 12, 493499.CrossRefGoogle Scholar
Bushinsky, DA (1996) Metabolic alkalosis decreases bone calcium efflux by suppressing osteoclasts and stimulating osteoblasts. American Journal of Physiology 271, F216F222.Google ScholarPubMed
Bushinsky, DA (1997) Decreased potassium stimulates bone resorption. American Journal of Physiology 272, F774F780.Google ScholarPubMed
Bushinsky, DA (1998) Acid-base imbalance and the skeleton. In Nutritional Aspects of Osteoporosis '97, Proceedings of the 3rd International Symposium on Nutritional Aspects of Osteoporosis, Switzerland, 1997. Challenges of Modern Medicine, pp. 208217 [Burckhardt, P, Dawson-Hughes, B and Heaney, RP, editors]. Italy: Ares-Serono Symposia Publications.Google Scholar
Bushinsky, DA, Gavrilov, K, Chabala, JM & Levi-Setti, R (1997) Metabolic acidosis decreases potassium content of bone. Journal of the American Society ofNephrology 7, 1787.Google Scholar
Bushinsky, DA, Kreiger, NS, Geisser, DI, Grossman, EB & Coe, FL (1983) Effects of bone calcium and proton fluxes in vitro. American Journal of Physiology 245, F204F209.Google ScholarPubMed
Bushinsky, DA, Lam, BC, Nespeca, R, Sessler, NE & Grynpas, MD (1993) Decreased bone carbonate content in response to metabolic, but not respiratory, acidosis. American Journal of Physiology 265, F53OF536.Google Scholar
Bushinsky, DA & Sessler, NE (1992) Critical role of bicarbonate in calcium release from bone. American Journal of Physiology 263, F510F515.Google ScholarPubMed
Bushinsky, DA, Sessler, NE, Glena, RE & Featherstone, JDB (1994) Proton-induced physicochemical calcium release from ceramic apatite disks. Journal of Bone and Mineral Research 9, 213220.CrossRefGoogle ScholarPubMed
Chen, Y, Ho, SC, Lee, R, Lam, S & Woo, J (2001) Fruit intake is associated with better bone mass among Hong Kong Chinese early postmenopausal women. Journal of Bone and Mineral Research 16, Suppl. 1, S386.Google Scholar
Chiu, JF, Lan, SJ, Yang, CY, Wang, PW, Yao, WJ, Su, LH & Hsieh, CC (1997) Long term vegetarian diet and bone mineral density in postmenopausal Taiwanese women. Calcified Tissue International 60, 245249.CrossRefGoogle ScholarPubMed
Cummings, SR, Nevitt, MC, Browner, WS, Stone, K, Fox, KM & Ensrud, KE (1995) Risk factors for hip fracture in white women. New England Journal of Medicine 332, 767773.CrossRefGoogle ScholarPubMed
Dawson-Hughes, B, Harris, SS & Finneran, S (1995) Calcium absorption on high and low Ca intakes in relation to vitamin D receptor genoptype. Journal of Clinical Endocrinology and Metabolism 80, 36573661.Google Scholar
Department of Health (1998) Nutrition and Bone Health: With Particular References to Calcium and Vitamin D. Report on Health and Social Subjects no. 49. London: The Stationery Office.Google Scholar
Eaton, BS, Eaton, BS III, Konner, MJ & Shostak, M (1996) An evolutionary perspective enhances understanding of human nutritional requirements. Journal of Nutrition 126, 17321740.CrossRefGoogle ScholarPubMed
Eaton, BS & Konner, M (1985) Paleolithic nutrition. A consideration of its nature and current implications. New England Journal of Medicine 312, 283290.CrossRefGoogle ScholarPubMed
Eaton-Evans, J, Mcllrath, EM, Jackson, WE, Bradley, P & Strain, JJ (1993) Dietary factors and vertebral bone density in perimenopausal women from a general medical practice in Northern Ireland. Proceedings of the Nutrition Society 52, 44A.Google Scholar
Eisman, JA (1999) Genetics of osteoporosis. Endocrine Reviews 20, 788804.CrossRefGoogle ScholarPubMed
Ellis, FR, Holesh, S & Ellis, JW (1972) Incidence of osteoporosis in vegetarians and omnivores. American Journal of Clinical Nutrition 25, 555558.CrossRefGoogle ScholarPubMed
Ellis, FR, Holesh, S & Sanders, TA (1974) Osteoporosis in British vegetarians and omnivores. American Journal of Clinical Nutrition 27, 769770.CrossRefGoogle Scholar
Ferrari, SL, Garnero, P, Ahn-Luong, LE, Montgomery, H, Humphries, S &Greenspan, S (2000) Functional polymorphic variant in the IL-6 gene promoter associated with low bone resorption in postmenopausal women. Osteoporosis International 11, S147.Google Scholar
Food and Nutrition Board of the Institute of Medicine (1997) Dietary Reference Intakes: Calcium, Phosphorus, Magnesium, Vitamin D and Fluoride. Washington, DC: National Academy Press.Google Scholar
Fox, D (2001) Hard cheese. New Scientist 15 12 issue, 4245.Google Scholar
Frassetto, LA, Morris, RC Jr & Sebastian, A (1996) Effect of age on blood acid-base composition in adult humans: role of age-related renal functional decline. American Journal of Physiology 271, F1114F1122.Google ScholarPubMed
Frassetto, LA & Sebastian, A (1996) Age and systemic acid-base equilibrium: analysis of published data. Journal of Gerontology 51A, B91B99.Google ScholarPubMed
Frassetto, LA, Todd, K, Morris, RC Jr & Sebastian, A (1998) Estimation of net endogenous noncarbonic acid production in humans from dietary protein and potassium contents. American Journal of Clinical Nutrition 68, 576583.CrossRefGoogle Scholar
Gastineau, CF, Power, MH & Rosevear, JW (1960) Metabolic studies of a patient with osteoporosis and diabetes mellitus: effects of testosterone enanthate and strontium lactate. Proceedings of the Mayo Clinic 35, 105111.Google Scholar
Goto, K (1918) Mineral metabolism in experimental acidosis. Journal of Biological Chemistry 36, 355376.CrossRefGoogle Scholar
Green, J & Kleeman, R (1991) Role of bone in regulation of systematic acid-base balance (editorial review). Kidney International 39, 926.CrossRefGoogle Scholar
Gregory, J, Foster, K, Tyler, H & Wiseman, M (1990) The Dietary and Nutritional Survey of British Adults. London: H.M. Stationery Office.Google Scholar
Hammond, RH & Storey, E (1970) Measurement of growth and resorption of bone in rats fed meat diet. Calcified Tissue Research 4, 291.CrossRefGoogle ScholarPubMed
Heaney, RP (1998) Excess dietary protein may not adversely affect bone. Journal of Nutrition 128, 10541057.CrossRefGoogle Scholar
Heaney, RP, Abrams, S, Dawson-Hughes, B, Looker, A, Marcus, R, Matkovic, V & Weaver, C (2000) Peak bone mass. Osteoporosis International 11, 9851009.CrossRefGoogle ScholarPubMed
Heaney, RP (2001 b) Protein intake and bone health: the influence of belief systems on the conduct of nutritional science (editorial). American Journal of Clinical Nutrition 73, 34.CrossRefGoogle Scholar
Hunt, IF, Murphy, NJ, Henderson, C, Clark, VA, Jacobs, RM, Johnston, PK & Coulson, AH (1989) Bone mineral content in postmenopausal women: comparison of omnivores and vegetarians. American Journal of Clinical Nutrition 50, 517523.CrossRefGoogle ScholarPubMed
Irving, L &Chute, AL (1933) The participation of the carbonates of bone in the neutralisation of ingested acid. Journal of Cellular Physiology 2, 157.CrossRefGoogle Scholar
Jones, G, Riley, MD & Whiting, S (2001) Association between urinary potassium, urinary sodium, current diet, and bone density in prepubertal children. American Journal of Clinical Nutrition 73, 839844.CrossRefGoogle ScholarPubMed
Kraut, JA & Coburn, JW (1994) Bone, acid and osteoporosis. New England Journal of Medicine 330, 18211822.CrossRefGoogle ScholarPubMed
Kreiger, NA, Sessler, NE & Bushinsky, DA (1992) Acidosis inhibits osteoblastic and stimulates osteoclastic activity in vitro. American Journal of Physiology 262, F442F448.Google Scholar
Kurtz, I, Maher, T, Hulter, HN, Schambelan, M & Sebastian, A (1983) Effect of diet on plasma acid-base composition in normal humans. Kidney International 24, 670680.CrossRefGoogle ScholarPubMed
Lau, EM, Kwok, T, Woo, J &Ho, SC (1998) Bone mineral density in Chinese elderly female vegetarians, vegans, lactoovovegetarians and omnivores. European Journal of Clinical Nutrition 52, 6064.CrossRefGoogle Scholar
Lemann, J Jr, Adams, ND & Gray, RW (1979) Urinary calcium excretion in humans. New England Journal of Medicine 301, 535541.Google Scholar
Lemann, J Jr, Gray, RW, Maierhofer, WJ & Cheung, HS (1986) The importance of renal net acid excretion as a determinant of fasting urinary calcium excretion. Kidney International 29, 743746.CrossRefGoogle ScholarPubMed
Lemann, J Jr, Gray, RW & Pleuss, JA (1989) Potassium bicarbonate, but not sodium bicarbonate, reduces urinary calcium excretion and improves calcium balance in healthy men. Kidney International 35, 688695.CrossRefGoogle ScholarPubMed
Lemann, J Jr, Litzow, JR & Lennon, EJ (1966) The effects of chronic acid load in normal man: Further evidence for the participation of bone mineral in the defence against chronic metabolic acidosis. Journal of Clinical Investigation 45, 16081614.CrossRefGoogle Scholar
Lemann, J Jr, Litzow, JR & Lennon, EJ (1967) Studies of the mechanisms by which chronic metabolic acidosis augments urinary calcium excretion in man. Journal of Clinical Investigations 46, 13181328.CrossRefGoogle ScholarPubMed
Lemann, J Jr, Pleuss, JA, Gray, RW & Hoffmann, RG (1991) Potassium administration increases and potassium deprivation reduces urinary calcium excretion in healthy adults. Kidney International 39, 973983.CrossRefGoogle ScholarPubMed
Lin, P, Ginty, F, Appel, L, Svetky, L, Bohannon, A, Barclay, D, Gannon, R & Aickin, M (2001) Impact of sodium intake and dietary patterns on biochemical markers of bone and calcium metabolism. Journal of Bone and Mineral Research 16, Suppl. 1 S511.Google Scholar
Lloyd, T, Schaeffer, JM, Walker, MA &Demers, LM (1991) Urinary hormonal concentrations and spinal bone densities of premenopausal vegetarian and norivegetarian women. American Journal of Clinical Nutrition 54, 10051010.CrossRefGoogle ScholarPubMed
Macdonald, HM, New, SA, Fraser, WD, Black, AJ, Grubb, DA & Reid, DM (2002 b) Increased fruit and vegetable intake reduces bone turnover in early postmenopausal Scottish women. Osteoporosis International (In the Press).Google Scholar
Macdonald, HM, New, SA, Grubb, DA, Golden, MHN & Reid, DM (2001 a) Impact of food groups on perimenopausal bone loss. In: Nutritional Aspects of Osteoporosis 2000. 4th International Symposium on Nutritional Aspects of Osteoporosis, Switzerland, 2000. Challenges of Modern Medicine pp. 399408 [Burckhardt, P, Dawson-Hughes, B and Heaney, RP, editors]. Italy: Ares-Serono Symposia Publications, Academic Press.Google Scholar
Macdonald, HM, New, SA, Grubb, DA & Reid, DM (2002 a) Higher intakes of fruit and vegetables are associated with higher bone mass in perimenopausal Scottish women. Proceedings of the Nutrition Society 61, (In the Press).Google Scholar
Macdonald, HM, New, SA, McGuigan, FE, Golden, MHN, Ralston, SH, Grubb, DA & Reid, DM (2000) Femoral neck bone loss and dietary Ca intake in peri and early post-menopausal women: an association dependent on VDR genotype. Journal of Bone and Mineral Research 15, S202.Google Scholar
Macdonald, HM, New, SA, McGuigan, FE, Golden, MHN, Ralston, SH, Grubb, DA & Reid, DM (2001 b) Modest alcohol intake reduces bone loss in peri and early postmenopausal Scottish women: an effect depend on estrogen receptor genotype? Bone 28, S95.Google Scholar
Mann, G (1975) Bone mineral content of North Alaskan Eskimos (letter). American Journal of Clinical Nutrition 28, 566567.CrossRefGoogle ScholarPubMed
Marcus, R (1999) Physical activity and regulation of bone mass. Primer on the Metabolic Bone Diseases and Disorders of Mineral Metabolism, 4th ed., pp. 262264. London: Lippincott, Williams & Wilkins.Google Scholar
Marsh, AG, Sanchez, TV, Chaffee, FL, Mayor, GH & Mickelsen, O (1983) Bone mineral mass in adult lactoovovegetarian and omnivorous males. American Journal of Clinical Nutrition 43, 155162.Google Scholar
Marsh, AG, Sanchez, TV, Mickelsen, O, Chaffee, FL & Fagal, SM (1988) Vegetarian lifestyle and bone mineral density. American Journal of Clinical Nutrition 48, 837841.CrossRefGoogle ScholarPubMed
Marsh, AG, Sanchez, TV, Mickelsen, O, Keiser, J & Major, G (1980) Cortical bone density of adult lactoovovegetarians and omnivorous women. Journal of the American Dietetic Association 76, 148151.CrossRefGoogle ScholarPubMed
Mazess, RB & Mather, WE (1974) Bone mineral content of North Alaskan Eskimos. American Journal of Clinical Nutrition 27, 916925.CrossRefGoogle ScholarPubMed
Mazess, RB & Mather, WE (1975 a) Bone mineral content in Canadian Eskimos. Human Biology 47, 45.Google ScholarPubMed
Mazess, RBMather, WE (1975 b) Bone mineral content of North Alaskan Eskimos (letter). American Journal of Clinical Nutrition 28 567.CrossRefGoogle Scholar
Meema, HE (1973) Photographic density versus bone density (letter). American Journal of Clinical Nutrition 26, 687.CrossRefGoogle Scholar
Meema, HE (1996) What's good for the heart is not good for the bones? (letter). Journal of Bone and Mineral Research 11, 704.CrossRefGoogle ScholarPubMed
Meghji, S, Morrison, MS, Henderson, B & Arnett, TR (2001) PH dependence of bone resorption: mouse calvarial osteoclasts are activated by acidosis. American Journal of Physiology 280, E112E119.Google ScholarPubMed
Michaelsson, K, Holmberg, L, Maumin, H, Wolk, A, Bergstrom, R & Ljunghall, S (1995) Diet, bone mass and osteocalcin; a cross-sectional study. Calcified Tissue International 57, 8693.CrossRefGoogle ScholarPubMed
Miller, DR, Krall, EA, Anderson, JJ, Rich, SE, Rourke, A & Chan, J (2001) Dietary mineral intake and low bone mass in men: The VALOR Study. Journal of Bone and Mineral Research 16, Suppl. 1, S395.Google Scholar
Morris, RC Jr (2001) Acid-base, sodium and potassium as determinants of bone and calcium economy. In Nutritional Aspects of Osteoporosis 2000. Proceedings of the 4th International Symposium on Nutritional Aspects of Osteoporosis, Switzerland, 2000. Challenges of Modem Medicine, pp. 357378 [Burckhardt, P, Dawson-Hughes, B and Heaney, RP, editors]. Italy: Ares-Serono Symposia Publications.Google Scholar
Muhlbauer, R & Li, Y (1999) Effects of vegetables on bone metabolism. Nature 401 343344.CrossRefGoogle ScholarPubMed
National Osteoporosis Society (2002) Facts and Figures on Osteoporosis. Bath, Avon: National Osteoporosis Society.Google Scholar
New, SA (1998) ‘Fit but Fragile’ – are elite sportswomen at an increased risk of osteoporosis? Nutrition Bulletin 23, 211213.CrossRefGoogle Scholar
New, SA (1999) Bone health: the role of micronutrients. British Medical Bulletin 55, 619633.CrossRefGoogle ScholarPubMed
New, SA (2001 a) Nutrition, exercise and bone health. Proceedings of the Nutrition Society 60, 265274.Google Scholar
New, SA (2001 b) Impact of food clusters on bone. In Nutritional Aspects of Osteoporosis 2000. Proceedings of the 4th International Symposium on Nutritional Aspects of Osteoporosis, Switzerland, 2000. Challenges of Modern Medicine, pp. 379397 [Burckhardt, P, Dawson-Hughes, B and Heaney, RP, editors]. Italy: Ares-Serono Symposia Publications, Academic Press.Google Scholar
New, SA, Bolton-Smith, C, Grubb, DA & Reid, DM (1997) Nutritional influences on bone mineral density: a cross-sectional study in premenopausal women. American Journal of Clinical Nutrition 65, 18311839.CrossRefGoogle Scholar
New, SA, Macdonald, HM, Grubb, DA & Reid, DM (2001) Positive association between net endogenous non-carbonic acid production (NEAP) and bone health: further support for the importance of the skeleton to acid-base balance. Bone 28, Suppl.5, S94.Google Scholar
New, SA, Macdonald, HM, Reid, DM & Dixon, AStJ (2002 a) Hold the soda. New Scientist 2330, 5455.Google Scholar
New, SA, Robins, SPM, Campbell, MK, Martin, JC, Garton, MJ, Bolton-Smith, C, Grubb, DA, Lee, SJ & Reid, DM (2000) Dietary influences on bone mass and bone metabolism: further evidence of a positive link between fruit and vegetable consumption and bone health? American Journal of Clinical Nutrition 71, 142151.CrossRefGoogle Scholar
New, SA, Smith, R, Brown, JC & Reid, DM (2002 b) Positive associations between fruit & vegetable consumption and bone mineral density in late postmenopausal and elderly women. Osteoporosis International (In the Press).Google Scholar
Patterson, BH, Block, G & Rosenberger, WF (1990) Fruit and vegetables in the American diet: data from the NHANES II Survey. American Journal of Public Health 80, 14431449.CrossRefGoogle ScholarPubMed
Ralston, SH (1999) The genetics of osteoporosis. Bone 25, 8586.CrossRefGoogle ScholarPubMed
Reed, JA, Anderson, JBB, Tylavsky, FA & Gallagher, PN Jr (1994) Comparative changes in radial bone density of elderly female lactoovovegetarians and omnivores. American Journal of Clinical Nutrition 59, 1197S1202S.CrossRefGoogle ScholarPubMed
Reidenberg, MM, Haag, BL, Channick, BJ, Schuman, CR & Wilson, TGG (1966), The response of bone to metabolic acidosis in man. Metabolism 15, 236241.CrossRefGoogle ScholarPubMed
Remer, T & Manz, F (1994), Estimation of the renal net acid excretion by adults consuming diets containing variable amounts of protein. American Journal of Clinical Nutrition 59, 13561361.CrossRefGoogle ScholarPubMed
Remer, T & Manz, F (1995), Potential renal acid load of foods and its influence on urine pH. Journal of the American Dietetic Association 95, 791797.CrossRefGoogle ScholarPubMed
Rizzoli, R, Schurch, MA, Chevally, T, Ammann, P & Bonjour, JP (1998) Protein intake and osteoporosis. In Nutritional Aspects of Osteoporosis '97. Proceedings of the 3rd International Symposium on Nutritional Aspects of Osteoporosis, Switzerland, 1997. Challenges of Modern Medicine,, pp. 141158. [Burckhardt, P, Dawson-Hughes, B and Heaney, RP, editors]. Italy: Ares-Serono Symposia Publications.Google Scholar
Royal College of Physicians (2000) Osteoporosis Clinical Guidelines for Prevention and Treatment. London: Royal College of Physicians.Google Scholar
Sebastian, A, Harris, ST, Ottaway, JH, Todd, KM & Morris, RC Jr (1994), Improved mineral balance and skeletal metabolism in postmenopausal women treated with potassium bicarbonate. New England Journal of Medicine 330, 17761781.CrossRefGoogle ScholarPubMed
Sebastian, A, Hemandez, RE, Portale, AA, Colman, J, Tatsuno, J & Morris, RC Jr (1990), Dietary potassium influences kidney maintenance of serum phosphorus concentrations. Kidney International 37, 13411349.CrossRefGoogle Scholar
Sebastian, A, Sellmeyer, DE, Stone, KL & Cummings, SR (2001), Dietary ratio of animal to vegetable protein and rate of bone loss and risk of fracture in postmenopausal women (letter). American Journal of Clinical Nutrition 74, 411412.CrossRefGoogle Scholar
Sellmeyer, DE, Stone, KL, Sebastian, A & Cummings, SR for the Study of Osteoporotic Fractures (2001), A high ratio of dietary animal to vegetable protein increases the rate of bone loss and the risk of fracture in postmenopausal women. American Journal of Clinical Nutrition 73, 118122.CrossRefGoogle ScholarPubMed
Stone, KL, Blackwell, T, Orwoll, ES, Cauley, JC, Barrett-Connor, E, Marcus, R, Nevitt, MC & Cummings, SR (2001), The relationship between diet and bone mineral density in older men. Journal of Bone and Mineral Research 16, Suppl. 1, S388.Google Scholar
Tesar, R, Notelovitz, M, Shim, E, Kauwell, G & Brown, J (1992), Axial and peripheral bone density and nutrient intakes of postmenopausal vegetarian and omnivorous women. American Journal of Clinical Nutrition 56, 699704.CrossRefGoogle ScholarPubMed
Torgerson, DJ, Iglesias, C & Reid, DM (2001) Economics of Osteoporosis. Key Advance Series, pp. 111121. London: Aesculalpius Medical Press.Google Scholar
Tucker, KL, Hannan, MT, Chen, H, Wilson, PWF & Keil, DP (1999), Potassium and fruit & vegetables are associated with greater bone mineral density in elderly men and women. American Journal of Clinical Nutrition 69, 727736.CrossRefGoogle ScholarPubMed
Tylavsky, F & Anderson, JJB (1988), Bone health of elderly lactoovovegetarian and omnivorous women. American Journal of Clinical Nutrition 48, 842849.CrossRefGoogle ScholarPubMed
Wachman, A & Bernstein, DS (1968), Diet and osteoporosis. Lancet i, 958959.CrossRefGoogle Scholar
Widdowson, EM, McCance, RA & Spray, CM (1951), The chemical composition of the human body. Clinical Science 10, 113125.Google ScholarPubMed
Wood, RJ (1994), Potassium bicarbonate supplementation and calcium metabolism in postmenopausal women: are we barking up the wrong tree?. Nutrition Reviews 52, 278280.Google ScholarPubMed
World Health Organization (1994) Study Group on Assessment of Fracture Risk and Its Application to Screening and Postmenopausal Osteoporosis. Report of a WHO Study Group. Technical Report Series no. 84, Geneva: WHO.Google Scholar
Zumda, J, Cauley, J, Stone, K, Nevitt, M, Ensrud, K, Harris, E, Hochberg, M, Morin, P, Saiz, R, Joslyn, G & Cummings, SR (2000), An interleukin 6 promoter polymorphism is associated with hip bone loss in older women. Osteoporosis International 11, S58.Google Scholar