Browsing by Author "Herselman, M. G."

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    Nutritional composition of South African eggs
    (Health & Medical Publishing Group, 1994) Herselman, M. G.; Blaauw, Renee; Labadarios, D.; Langenhoven, M. L.; Kruger, M.
    We congratulate Van Niekerk and Van Heerden on their excellent study on the nutritional composition of South African eggs,' in which they show that the cholesterol content of South African eggs is 23,5% lower than the values listed in the NRlND Food Composition Tables. The anicle raises a number of imponant issues that should be addressed.
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    Nutritional status of renal transplant patients
    (Health & Medical Publishing Group, 2002) Du Plessis, A. S.; Randall, H.; Escreet, E.; Holl, M.; Conradie, M.; Moosa, M. R.; Labadarios, D.; Herselman, M. G.
    Objective. To assess the effect of renal transplantation on the nutritional status of patients. Design. Prospective descriptive study. Setting. Renal Transplant Clinic at Tygerberg Hospital, Western Cape. Subjects. Fifty-eight renal transplant patients from Tygerberg Hospital were enrolled in the study. The sample was divided into two groups of 29 patients each: group 1, less than 28 months post-transplant; and group 2, more than 28 months post-transplant. Outcome measures. Nutritional status assessment comprised biochemical evaluation, a dietary history, anthropometric measurements and a clinical examination. Results. Serum vitamin B6 levels were below normal in 56% of patients from group 1 and 59% from group 2. Vitamin B6 intake, however, was insufficient in only 14% of patients from group 1 and 10% from group 2. Serum vitamin C levels were below normal in 7% of patients from group 1 and 24% from group 2, while vitamin C intake was insufficient in 21% and 14% of patients from groups 1 and 2 respectively. Serum magnesium levels were below normal in 55% of patients from group 1, and in 28% from group 2. Serum albumin and cholesterol levels increased significantly during the post-transplant period in the total sample (P = 0.0001). There was also a significant increase in body mass index (P = 0.0001) during the post-transplant period. Conclusions. Several nutritional abnormalities were observed, which primarily reflect the side-effects of immunosuppressive therapy. The causes, consequences and treatment of the vitamin B6 and vitamin C deficiencies in renal transplant recipients need further investigation.
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    Supplemented low-protein diets : are they superior in chronic renal failure?
    (Health & Medical Publishing Group, 1995) Herselman, M. G.; Albertse, E. C.; Lombard, C. J.; Swanepoel, C. R.; Hough, F. S.
    Twenty-two patients with chronic renal failure were randomly assigned to a conventional low-protein diet containing 0,6g protein/kg/day or a very-low-protein diet containing 0,6g protein/kg/day supplemented with essential amino acids; they were followed up for 9 months. There were no significant changes in body mass index, arm muscle area, percentage body fat, serum albumin and transferrin levels in any of the groups; neither was there any difference between the groups in respect of these parameters. Renal function, as measured by the reciprocal of serum creatinine over time, stabilised in both groups during intervention, with no significant difference between the groups. There was however no correlation between changes in renal function and changes in blood pressure, or dietary intake of protein, phosphorus, cholesterol, polyunsaturated and saturated fatty acids. There were also no significant changes and no significant differences between the groups in serum levels of parathyroid hormone and alkaline phosphatase, urine cyclic adenosine monophosphate, tubular reabsorption of phosphate, and the theoretical renal threshold for phosphate. The results of this study suggest that the supplemented very-low-protein diet was not superior to the conventional low-protein diet in terms of its effect on protein-energy status, renal function and biochemical parameters of renal osteodystrophy.