Modifying diets to satisfy nutritional requirements using linear programming

Abstract

A computational method for constructing individually acceptable diets by modifying a chosen diet to meet nutritional requirements is described. The effects on food quantities of imposing different nutrient requirements on a sample diet are demonstrated and techniques which can ensure the acceptability to the individual of the modified diet are described. The starting point in the calculation is the person's current dietary intake. This is modified using linear programming methods which make the smallest changes to the food quantities to meet specific targets. Sequential modification can be used to identify changes that are acceptable to the individual. The computer program has been developed in collaboration with practising dietitians and is in use in some leading UK hospitals.

Linear programming can help identify practical solutions to improve the nutritional quality of food aid

“…the EU donation plus the FB collection). The specific macronutrients examined were proteins, lipids, saturated fatty acids (SFA) and carbohydrates; and the micronutrients examined were vitamins A, D, E, C, B 1 , B 2 , B 6 , B 12 , folate, magnesium, calcium and iron. Dietary fibre, 18:2n-6 (linoleic acid), 18:3n-3 (a-linolenic acid) and 22:6n-3 (docosahexaenoic acid; DHA) were also examined.…”

Application of Fuzzy Logic in Diet Therapy - Advantages of Application

“…As some studies show (Carlson et al, 2007;Murphy and Britten, 2006;Katamay et al, 2007;Cleveland et al, 1993;Soden and Fletcher, 1992) the main goal of linear programming used in meal planning is to reach the nutrient-based recommendations and also translation of the set of nutrient-based recommendations into foods (not food composites) for each individual or group that is a representative sample of the target population (Maillot et al, 2010), that are in accordance with set limits and the goal function.…”

“…But collection of those result are much more demanding because each new solution requires repetition performance of the optimisation process. Until now, it has been used to design either individual diets (Soden and Fletcher, 1992;Colavita and D`Orsi, 1990) or population diets (Maes et al, 2008;Carlson et al, 2007;Cleveland et al, 1993;Darmon et al, 2002) and their implications in terms of food choices (Ferguson et al, 2006).…”

“…It is well known that there is a direct and positive relationship between age and gender with increased prevalence and severity of hypertension. Burt et al (1995) have published that hypertension is a huge problem for people aged 60-74 years, 72.6% of the African American population and 50.6% of the Caucasian population had hypertension during 1988-1991(Burt et al, 1995. Also African Americans, women older than 59 years, and older people have a higher prevalence and, even when treated, a greater severity of hypertension than Caucasians, men, and younger people (Hajjar & Kotchen, 2003Appel, et al, 1997.…”

Toplu Beslenme İçi̇n Menü Planlama Karar Destek Si̇stemi̇ Geli̇şti̇ri̇lmesi̇ Ve Uygulanmasi

“…Ayrıca, tasarlanan modelin yıl boyunca bütünleşik çalışabilen bir özelliğe sahip olması yapılan çalışmayı literatürde önerilen modellerden [3][4][5][6][7][8][9][10][11][12] ayıran en önemli özelliğidir. Zira önerilen modellerde planlama dönemi değiştikçe uygulayıcılar ya model yapısında oynayarak kısıt ekleyip çıkartmak zorunda kalmakta ya önerilen modelin çözümündeki menü listesinde el ile bazı değişiklikler yapmak zorunda kalmakta ya da her ay için ayrı-ayrı model tasarlanmak zorunda kalınmaktadır.…”