RESUMO
Objetivos Neste estudo foi investigado o efeito do consumo habitual de suco de laranja no perfil dos lípides e lipoproteínas em homens e mulheres normolipidêmicos. Métodos Todos os voluntários (n=29) consumiram 750mL/dia de suco de laranja durante 60 dias. Variáveis bioquímicas como perfil lipídico, apolipoproteínas, glicose, paraoxonase1 e o tamanho de HDL foram medidas antes e após o período de suplementação com suco de laranja. Também foram realizadas medidas antropométricas e inquéritos dietéticos. Resultados O consumo crônico de suco de laranja reduziu significativamente o colesterol total nos homens (11 por cento, p<0,05) e nas mulheres (10 por cento, p<0,05) e o LDL-C nos homens e mulheres (15 por cento, p<0,05). O HDL-C e a apoA-I também diminuíram, refletindo a redução do colesterol total. Os triacilgliceróis, apo B, PON1, tamanho da HDL, IMC, gordura corporal e circunferência abdominal não foram modificados com o tratamento com suco de laranja. Conclusão Neste estudo, mostrou-se que o suco de laranja apresenta propriedade redutora sobre o colesterol, e foi sugerido que a associação dos flavonóides cítricos com a vitamina C previne o estresse oxidativo e o desenvolvimento da aterosclerose.
Objective This study investigated the effect of regular orange juice consumption on blood lipids and lipoproteins of normolipidemic men and women. Methods All volunteers (n=29) consumed 750mL of orange juice daily for 60 days. Biochemical variables such as lipid profile, apolipoproteins, glucose, paraoxonase 1, and HDL size, were measured before and after the orange juice consumption period. Anthropometric and dietary data were also collected. Results Daily consumption of orange juice significantly reduced total cholesterol in men (11 percent, p<0.05) and women (10 percent, p<0.05) and LDL-cholesterol (15 percent, p<0.05) in men and women. HDL-C and Apo A-I also decreased, reflecting the reduction in total cholesterol. Triacylglycerols, apolipoprotein B, PON 1, HDL size, BMI, body fat, and waist circumference were not affected by orange juice consumption. Conclusion Orange juice presented cholesterol-lowering activity and the association between citrus flavonoids and vitamin C may prevent oxidative stress and the development of atherosclerosis.
RESUMO
OBJECTIVE: This study investigated how consumption of orange juice associated with aerobic training affected serum lipids and physical characteristics of overweight, middle-aged women. METHODS: The experimental group consisted of 13 women who consumed 500 mL/d of orange juice and did 1h aerobic training 3 times a week for 3 months. The control group consisted of another 13 women who did the same aerobic training program but did not consume orange juice. RESULTS: At the end of the experiment, the control group lost an average of 15% of fat mass (P<0.05) and 2.5% of weight (P<0.05), whereas the experimental group lost 11% of fat mass and 1.2% of weight (P<0.05). Consumption of orange juice by the experimental group was associated with increased dietary intake of vitamin C and folate by 126% and 61% respectively. Serum LDL-C decreased 15% (P<0.05) and HDL-C increased 18% (P<0.05) in the experimental group, but no significant change was observed in the control group. Both groups improved the anaerobic threshold by 20% (P<0.05), but blood lactate concentration decreased 27% in the experimental group compared to the 17% control group, suggesting that experimental group has less muscle fatigue and better response to training. CONCLUSIONS: The consumption of 500 mL/d of orange juice associated with aerobic training in overweight women decreased cardiovascular disease risk by reducing LDL-C levels and increasing HDL-C levels. This association also decreased blood lactate concentration and increased anaerobic threshold, showing some improvement in the physical performance.
