Dried Fruits: Phytochemicals and Health Effects

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In addition to being rich sources of phytochemicals, plant foods also are sources of fiber, vitamins, and minerals whose mechanisms have been more clearly elucidated. But identifying which individual compounds are responsible for the benefits associated with phytochemical-rich foods is difficult, if not impossible, because of the interactions that occur with vitamins, minerals, and fiber as well as among the phytochemicals themselves.

Factors That Affect Metabolism The bioavailability of phytochemicals varies greatly and can range from less than 0. Unidentified Therapeutic Intakes Even though many phytochemicals are believed to have disease-preventing properties, the lack of food composition data and the incomplete understanding of their absorption, metabolism, and interaction have prevented the Institute of Medicine from creating a Dietary Reference Intake DRI for any of them.

The research regarding phytochemicals is complicated by the fact that the effects of consuming phytochemical-rich foods may be most beneficial for people with more severe metabolic abnormalities, such as elevated blood lipids, type 2 diabetes, or obesity, and may not be as apparent in otherwise healthy populations. The complexity of the family of phytochemicals, their potential interactions, and the possible variations in levels found in any given food make it currently impossible to issue specific phytochemical guidelines.

In addition, people eat a variety of foods and nutrients every day, each combination holding the potential for unique interactive effects, again making it extremely difficult to link a particular food, nutrient, or phytochemical to a specific health or disease outcome. More information is needed before dietary recommendations can be made. Potential Risks Phytochemicals are widely distributed in the food supply, yet because of the lack of an accurate, comprehensive database, estimating intake remains difficult.

One of the major functions of phytochemicals is their role as antioxidants. While it would be difficult to get excessive amounts of antioxidant phytochemicals from the diet, large doses of antioxidants in the form of supplements have the potential to be harmful. However, experts such as the Dietary Guidelines for Americans Committee1 and the American Institute for Cancer Research3 agree that consuming a variety of plant-based foods is important for health.

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Research shows that those who meet the recommendations for fruit and vegetable consumption have considerably higher intakes of phytochemicals. Bear in mind that dark chocolate is richer in phytochemicals than milk chocolate, and tea varieties white, green, oolong, and black have different amounts and types of phytochemicals that may provide different health benefits. Learning Objectives After completing this continuing education course, nutrition professionals should be better able to:. Identify at least one condition or disease for which research suggests eating phytochemical-rich foods may decrease risk.

Which of the following best defines phytochemicals? Phytochemicals are foods that contain chlorophyll. Phytochemicals are compounds found only in fruits and vegetables. Phytochemicals are compounds found in all plant foods. Phytochemicals are compounds found only in supplements. Which group of foods below is not a rich source of phytochemicals? Butter, margarine, low-fat milk, cheddar cheese b. Oranges, blueberries, strawberries, apples c. Brown rice, oatmeal, kashi, whole wheat couscous d. Peanuts, pecans, walnuts, cashews. Research conclusively has shown that diets rich in certain phytochemicals can reduce the risk of several common diseases.

True b. Studies have found that diets rich in phytochemicals may help prevent which of the following? Cardiovascular disease b. Carpal tunnel syndrome c. Endometriosis d.

Gluten intolerance. What is the best dietary advice for consuming phytochemicals? Eliminate animal products from the diet. Eat raw phytochemical-rich foods. Take probiotics along with phytochemical-rich foods. Consume at least three to five servings of fruits and vegetables and three servings of whole grains per day.

What is the largest and most varied group of phytochemical compounds found in food? Isothiocynate b. Isoflavones c. Flavonoids d. If the diet provides few phytochemical-rich foods, phytochemical supplements are recommended. Which of the following foods has not been linked to a reduced risk of type 2 diabetes? Tea b. Whole grains c. Cocoa d. White rice. Studies on the effects of phytochemicals on health have been hindered the most by which of the following?

Lack of phytochemical nutrient databases b.

Lack of knowledge of the interactions among phytochemicals c. Lack of available funding for phytochemical research d. Dangers in eating too much phytochemical-rich food.

Superfruits: Phytochemicals, antioxidant efficacies, and health effects - A comprehensive review.

Phytochemicals are thought to be involved in which of the following? Preventing DNA damage b. Antihistamine effects c. Antibiotic effects d. Anti-HIV effects. References 1. Dietary Guidelines for Americans, Fruit and vegetable intake and risk of major chronic disease. J Natl Cancer Inst. Slavin JL, Lloyd B. Health benefits of fruits and vegetables. Adv Nutr.

Dried Fruits Phytochemicals Health Effects by Shahidi Fereidoon

Effects of tea and coffee on cardiovascular disease risk. Food Funct. The impact of coffee on health. The impact of green tea and coffee consumption on the reduced risk of stroke incidence in Japanese population: The Japan Public health center-based study cohort. Cocoa polyphenols and their potential benefits for human health. Oxid Med Cell Longev. J Nutr. Polyphenols and disease risk in epidemiologic studies. Am J Clin Nutr. Chalker-Scott L. Environmental significance of anthocyanins in plant stress responses.

Photochem Photobiol. Nutrition — The Nutrition Facts table indicates the amounts of nutrients which experts recommend to limit or consume in adequate amounts. Human nutrition — For aspects of nutrition science not specific to humans, see Nutrition. Human nutrition is the provision to humans to obtain the materials necessary to support life. Wolfberry — For other uses, see Wolfberry disambiguation. Cheng, J. An evidence-based update on the pharmacological activities and possible molecular targets of Lycium barbarum polysaccharides [Abstract].

Drug Design, Development and Therapy , 9 , 33— Endes, Z. Physico-chemical properties, fatty acid composition and mineral contents of goji berry Lycium barbarum L. Journal of Agroalimentary Processes and Technologies , 21 1 , 36— Gao, Y.


Hajian, S. Immunopathologia Persa , 1 1 , e Kocyigit, E. International Journal of Chinese Medicine , 1 1 , 1—9. Li, X.

Dried Fruits: Phytochemicals and Health Effects Dried Fruits: Phytochemicals and Health Effects
Dried Fruits: Phytochemicals and Health Effects Dried Fruits: Phytochemicals and Health Effects
Dried Fruits: Phytochemicals and Health Effects Dried Fruits: Phytochemicals and Health Effects
Dried Fruits: Phytochemicals and Health Effects Dried Fruits: Phytochemicals and Health Effects
Dried Fruits: Phytochemicals and Health Effects Dried Fruits: Phytochemicals and Health Effects

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