Procjene kakvoće prehrane i utjecaja L-karnitina na neke antropometrijske parametre u populaciji studenata ne-sportaša

master's thesis

• Title (english): Evaluation of diet quality and effects of carnitine supplementation on some antropometric parameters in non-sport population of students
• Author: Stjepan Stojaković
• Mentor: Ivančica Delaš (mentor)
• Granter: University of Zagreb; Faculty of Food Technology and Biotechnology; (Department of Food Quality Control); Zagreb
• Defense date and country: 2008-12-18, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Food Technology

Abstract

Zbog svoje uloge u transportu masnih kiselina iz citosola u mitohondrij, korištenje Lkarnitina postalo je popularno među sportašima, a postaje sve popularnije i kao dodatak prehrani za redukciju tjelesne mase među populacijom sjedilačkog načina života. Kako bi se utvrdio učinak uzimanja L-karnitina na promjenu tjelesne mase, proveden je dvostruko slijepi pokus uz kontrolu placebom. Zdravi dobrovoljci (N=30) u dobi od 18 do 32 godine, sjedilačkog načina života, uzimali su dnevno 2 g L-karnitina ili placebo kroz dva tjedna. Prije početka tretmana te nakon dva tjedna uzimanja preparata ispitanicima su izmjerene visina i tjelesna masa te određen indeks tjelesne mase. Na temelju mjerenja kožnih nabora kaliperom određen je udio masnog tkiva. U uzorcima krvi određena je koncentracija ukupnog i slobodnog karnitina. Za vrijeme trajanja eksperimenta dobrovoljci su vodili detaljan dnevnik prehrane čijom analizom su dobiveni podaci o kakvoći prehrane, ukupnom energetskom unosu i udjelu pojedinih nutrijenata u prehrani ispitanika. Rezultati pokusa su pokazali da unatoč manjem porastu koncentracije karnitina u krvi, primjena L-karnitina nije rezultirala značajnim smanjenjem tjelesne mase niti udjela tjelesne masti ispitanika. Zaključeno je da uzimanje preparata L-karnitina bez redovite tjelesne aktivnosti ili reduciranog energetskog unosa ne utječe na smanjenje tjelesne mase ili udjela masnog tkiva.

Abstract (english)

Because of its role in the transport of fatty acids from cytosol into mitochondrion, the consumption of L-carnitine became popular among athletes, and now is becoming more and more popular as a body mass loss supplement among sedentary population. In an attempt to obtain more data on the effect of L-carnitine supplementation on body mass reduction, a double-blind, placebo-controlled study was carried. Healthy volunteers (N=30), aged 18 to 32 years, with declared sedentary activities, received 2 g/day of either L-carnitine or placebo for 2 weeks. At the beginning of the experiment as well as after two weeks, the height and the body mass of participants were measured and the body mass index was calculated. Based on the results of skin folds measurements the ratio of body fat was determined. In the blood samples taken on the first and the last day of the experiment, the concentration of total and free carnitine was measured. During the experiment, volunteers were making detailed records about the food and drinks they consumed every day. The results of the experiment have shown that despite the fact that the concentration of carnitine in a blood serum increased to a lesser extent, the carnitine supplementation did not result in statistically significant reduction neither for body mass nor for body fat ratio. It was concluded that carnitine supplementation per se, without additional physical activity or reduced energy intake, can not reduce body mass or body fat ratio.

• Keywords: L-karnitin; kakvoća prehrane; redukcija tjelesne mase; sjedilačka populacija
• Keywords (english): body mass reduction; L-carnitine; nutrition quality; sedentary population
• Language: croatian
• URN:NBN: urn:nbn:hr:159:947273
• Study programme: Title: Food Technology; specializations in: Nutrition; Course: Nutrition; Study programme type: university; Study level: graduate; Academic / professional title: diplomirani inženjer prehrambene tehnologije; smjer nutricionizam (diplomirani inženjer prehrambene tehnologije; smjer nutricionizam)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Access restricted to students and staff of home institution
• Created on: 2017-08-31 10:46:06