A preliminary study on the effects of star fruit consumption on antioxidant and lipid status in elderly Thai individuals

Abstract

ObjectiveThe aims of this preliminary study were to evaluate the antioxidant and lipid status before and after star fruit juice consumption in healthy elderly subjects, and the vitamins in star fruit extracts.MethodsA preliminary designated protocol was performed in 27 elderly individuals with a mean (±SD) age of 69.5±5.3 years, by planning a 2-week control period before 4 weeks of consumption of star fruit twice daily. Oxidative stress parameters such as total antioxidant capacity, glutathione, malondialdehyde, protein hydroperoxide, multivitamins such as l-ascorbic acid (Vit C), retinoic acid (Vit A), and tocopherol (Vit E), and the lipid profile parameters such as cholesterol, triglyceride, high-density lipoprotein-cholesterol (HDL-C) and low-density lipoprotein-cholesterol (LDL-C) were analyzed. Moreover, Vit C, Vit A, and Vit E levels were evaluated in the star fruit extracts during the 4-week period.ResultsIn the 2-week control period, all parameters showed no statistically significant difference; after 4 weeks of consumption, significant improvement in the antioxidant status was observed with increased total antioxidant capacity and reduced malondialdehyde and protein hydroperoxide levels, as well as significantly increased levels of Vit C and Vit A, when compared to the two-time evaluation during the baseline periods. However, glutathione and Vit E showed no statistical difference. In addition, the HDL-C level was higher and the LDL-C level was significantly lower when compared to both baseline periods. But the levels of triglyceride and cholesterol showed no difference. Vit C and Vit A were identified in small quantities in the star fruit extract.ConclusionThis preliminary study suggested that consumption of star fruit juice twice daily for 1 month improved the elderly people’s antioxidant status and vitamins, as well as improved the lipoproteins related to Vit C and Vit A in the star fruit extract.

Effects of a simple prototype respiratory muscle trainer on respiratory muscle strength, quality of life and dyspnea, and oxidative stress in COPD patients: a preliminary study

“…Oxidative stress markers such as TAC, GSH, MDA, and NO were evaluated following the protocols in previous studies 30,31. After blood was taken from the anterior cubital vein of each subject and contained in a heparinized tube, 500 μL of whole blood was separated by 5, 5′-dithiobis-2-nitrobenzoic acid reagent to determine the GSH.…”

The impact of physical activity and fitness on health biomarkers and oxidative stress in adults aged over 55 years = Impacto de la actividad y la condición física sobre biomarcadores de salud y estrés oxidativo en adultos mayores de 55 años

“…Excess level of MDA levels has been reported when it undergoes cell damage or in several diseased conditions. Several authors are in concordance with our results (192,193,261). Rowinski et al found that oxidative stress parameters increase was age-related; nonetheless PA can decrease oxidative stress markers and induce adaptive increase in the erythrocyte antioxidant enzyme activity, mainly SOD, even in old and very old males and females (301).…”

“…Likewise, we found that CAT Lmf was associated whit higher intake of fruits per day in females. The results obtained are in concordance with others authors (148,192,204), nevertheless, the regression model showed an inverse relationship between vitamin E intake and CAT Plm. This may be due to a considerable number of participants presented intake below EAR.…”

“…Furthermore, we found that CAT Lmf was related to greater intake of fruits per day in females. The results obtained are in agreement with other authors (148,192,204); however, a negative association was found between vitamin E intake and CAT Plm for females in our study.…”

“…Females displayed a negative relationship between malondialdehyde (MDA) with PF, whereas high levels of PF were associated with high superoxide dismutase (SOD) activity in males. Several studies are in agreement with our results (192,193,261 cobalt, and zinc and lower mercury contents than inactive peers (341). Comparing both sexes between them, inactive females showed lower calcium and cobalt levels than inactive males.…”