Browsing by Author "Meltzer, Shelly"

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    A practical guide to the use of nutritional supplements in South Africa
    (2004) Meltzer, Shelly; Kohler, Ryan; Jakoet, Ismail; Noakes, Tim D
    Sportspersons should ensure that the decision to use a dietary supplement is a safe one. Unlike medicines, which are regulated by the Medicines Control Council, there is no governing body to control and regulate the supplement industry in South Africa. As a result many supplements may contain banned substances and there is a chance that not all the ingredients are accurately listed on the label of a supplement product. National and international sporting bodies place the responsibility of using supplements on the sportsperson. The legal clause ‘strict liability’ means that the sportsperson is responsible for any and all substances appearing in their urine and blood.
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    Conjugated linoleic acid versus high-oleic acid sunflower oil: effects on energy metabolism, glucose tolerance, blood lipids, appetite and body composition in regularly exercising individuals
    (2007) Lambert, Estelle V; Goedecke, Julia H; Bluett, Kerry; Heggie, Kerry; Claassen, Amanda; Rae, Dale E; West, Sacha; Dugas, Jonathan; Dugas, Lara; Meltzer, Shelly; Charlton, Karen; Mohede, Inge
    The aim of this study was to measure the effects of 12 weeks of conjugated linoleic acid (CLA) supplementation on body composition, RER, RMR, blood lipid profiles, insulin sensitivity and appetite in exercising, normal-weight persons. In this double-blind, randomised, controlled trial, sixty-two non-obese subjects (twenty-five men, thirty-seven women) received either 3.9 g/d CLA or 3.9 g high-oleic acid sunflower oil for 12 weeks. Prior to and after 12 weeks of supplementation, oral glucose tolerance, blood lipid concentrations, body composition (dual-energy X-ray absorptiometry and computerised tomography scans), RMR, resting and exercising RER and appetite were measured. There were no significant effects of CLA on body composition or distribution, RMR, RER or appetite. During the oral glucose tolerance tests, mean plasma insulin concentrations (0, 30, 120 min) were significantly lower (P= 0.04) in women who supplemented with CLA (24.3 (SD 9.7) to 20.4 (SD 8.5) microU/ml) compared to high-oleic acid sunflower oil control (23.7 (SD 9.8) to 26.0 (SD 8.8) microU/ml). Serum NEFA levels in response to oral glucose were attenuated in both men and women in the CLA (P=0.001) compared to control group. However, serum total cholesterol and LDL-cholesterol concentrations decreased in both groups and HDL-cholesterol concentrations decreased in women over 12 weeks (P=0.001, P=0.02, P=0.02, respectively). In conclusion, mixed-isomer CLA supplementation had a favourable effect on serum insulin and NEFA response to oral glucose in non-obese, regularly exercising women, but there were no CLA-specific effects on body composition, energy expenditure or appetite.
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    Open Access
    Evaluating exposure to and perceptions of the Woolworths Healthy Tuck Shop Guide in Cape Town, South Africa
    (2011) Marraccini, Toni; Draper, Catherine; Meltzer, Shelly; Bourne, Lesley
    Both under-nutrition and over-nutrition pose a public health concern, especially for children in South Africa. Several initiatives exist in South Africa in order to promote healthy eating and nutrition at schools. One of them is the Woolworths Making the Difference (MTD) Programme aimed at eliminating barriers to promoting healthy lifestyles that exist at schools, such as the availability of low cost, unhealthy foods either from tuck shops or street vendors. The Healthy Tuck Shop Guide is a recent addition to the MTD programme. The aim of this evaluation is to assess schools’ perceptions of the Woolworths Healthy Tuck Shop Guide as it is being utilized in Woolworths Making the Difference schools.