Although only one in 10 American adults eats enough fruits and vegetables, new research being presented at the Experimental Biology meeting this week in Washington, D.C., finds older adults are consuming higher levels of carotenoids, flavonoids and other phytonutrients found in fruits and vegetables that are thought to support healthy aging. Specifically, the new findings suggest that, calorie for calorie, intakes of carotenoids are 20 percent higher, flavonoids 40 percent higher, and ellagic acid is 80 percent higher among older compared to younger adults.
Phytonutrients, which are plant-based compounds found naturally in fruits and vegetables, may be associated with protective health benefits. For example, carotenoids such as lycopene and beta-carotene may offer breast, ovarian and other health benefits for women, while flavonoids such as quercetin and anthocyanidins may support brain health. Ellagic acid, found in foods like pomegranates, strawberries and walnuts, may help ward off some cancers, including breast and prostate.
This new phase of ongoing research, funded by Nutrilite Health Institute, the world's leading brand of vitamin, mineral, and dietary supplements based on 2008 sales, compares energy-adjusted phytonutrient intakes between younger (19-44 years), middle aged (45-64 years) and older adults (65+ years) to better understand if and how intakes vary by age. In addition to the carotenoid and flavonoid shortfalls observed among younger adults, the new data indicate that energy adjusted resveratrol intake (excluding wine) is 50 percent higher in older adults versus younger adults, while adjusted intakes of lycopene are similar between age groups, and allicin intake (found in garlic) by older adults is lower.
"We know that Americans of all ages are missing out on the protective benefits of phytonutrients, but most troubling is our new finding that shortfalls are greatest among younger adults – the very ones who could most benefit from a lifetime of consumption," said Keith Randolph, Ph.D., Technology Strategist for Nutrilite. Previous related research also supported by the Nutrilite Health Institute found that eight in 10 Americans have a "phytonutrient gap," meaning they fall short in consuming key phytonutrients from foods including fruits and vegetables that could benefit their health. Additional findings from that research showed that while most Americans do not meet recommended intakes of fruits and vegetables, women 65 years and older were doing the best with a mere 12 percent meeting intake recommendations.
Food Sources of Phytonutrients
To help uncover which foods Americans are eating that provide these important nutrients, top ranked food sources for each of the phytonutrients were identified.(3) Results showed that the top food source was not necessarily among the most phytonutrient-rich options, and that there may be opportunities for Americans to increase phytonutrient intakes by selecting more nutrient-rich options, such as the ones mentioned below: