J Am Diet Assoc
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Low intake of nutrients is associated with poor health outcomes. We examined the contribution of dietary supplementation to meeting recommended dietary intakes of calcium, magnesium, potassium, and vitamin C in participants of the Multi-Ethnic Study of Atherosclerosis, a cohort of white, African-American, Hispanic, and Chinese-American participants ages 45 to 84 years. We also assessed the prevalence of intakes above Tolerable Upper Intake Levels (ULs). ⋯ Although supplement use is associated with meeting DRI guidelines for calcium, vitamin C and magnesium, many adults are not meeting the DRI guidelines even with the help of dietary supplements, and the effect of supplementation can vary according to ethnicity and sex. However, supplementation was not significantly associated with meeting DRIs for potassium. Also, high-dose supplement use is associated with intakes above ULs for calcium, magnesium, and vitamin C.
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Fruits and vegetables, foods rich in flavonoids and antioxidants, have been associated with lower risk of stroke, coronary heart disease, and markers of inflammation and oxidative stress in adults. Markers of inflammation and oxidative stress are predictors of coronary heart disease risk; however, it is unknown whether these markers are related to dietary flavonoid and antioxidant intake in youth. ⋯ Study results show that the beneficial effects of fruit and vegetable intake on markers of inflammation and oxidative stress are already present by early adolescence and provide support for the Dietary Guidelines for Americans "to consume five or more servings per day" of fruits and vegetables to promote beneficial cardiovascular health.
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Although thirst and hunger have historically motivated drinking and feeding, respectively, the high and increasing consumption of energy-yielding beverages and energy-diluted foods may have degraded the predictive value of these sensations on ingestive behavior. Our within subject (ie, multiple responses from the same individuals), observational (ie, free-living, with no intervention) study explored the relationships between thirst, hunger, eating, and drinking patterns in 50 weight-stable adults (39 women and 11 men aged 30+/-11 years with body mass index 26.3+/-5.9). Twenty-four-hour dietary recalls were obtained for a consecutive 7-day period. ⋯ Further, energy-yielding beverages were the main contributor to fluid intake during both periprandial and drink-only events. These data fail to reveal associations between either thirst or hunger and ingestion of energy-yielding beverages, or strong associations between hunger and eating or thirst and drinking. These data raise questions about the predictive power of appetitive sensations for ingestive behavior.