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Voedingsvezels tegen overgewicht*
Uit een Australische studie onder 159 deelnemers met overgewicht blijkt dat alleen het toevoegen van extra voedingsvezels aan de voeding werkzaam kan zijn tegen overgewicht. Een jaar lang kregen de deelnemers aan de studie een supplement van of een polysaccharide complex (PGX) of van vlozaad of van een placebo. Alle deelnemers veranderden niets aan hun levensstijl en voeding en kregen dagelijks drie keer 5 gram supplement met 0,5 ltr water, 10 minuten voor het eten. Tijdens de studie en na afloop bleken deelnemers met PGX en vlozaad duidelijk afgevallen te zijn en minder lichaamsvet te hebben. Iets betere resultaten werden gezien in de groep met het supplement PGX.
De studie. (December 2016)

Effect on body weight and composition in overweight/obese Australian adults over 12 months consumption of two different types of fibre supplementation in a randomized trial
· Sebely Pal, Suleen Ho, Roland J. Gahler and Simon Wood
Nutrition & Metabolism201613:82
DOI: 10.1186/s12986-016-0141-7
© The Author(s). 2016
Abstract
Background/Objectives
Higher fibre intakes are associated with risk reduction for chronic diseases. However, many people find difficulty in consuming sufficient fibre through their diet. Supplements may be an effective alternative. We aimed to investigate the effects of PolyGlycopleX® (PGX®), a proprietary polysaccharide complex and a proprietary Psyllium product (PgxSyl™) (PSY) on diet, body weight and composition in overweight and obese individuals.
Subjects/Methods
This was a double-blind 52 weeks study with 159 people randomized to 3 groups: control (rice flour); PGX (PGX) and proprietary psyllium (PSY). Participants did not change any of their usual habits or diet except they consumed 5 g of supplement taken with a total of 500 ml of water 5–10 min before meals.
Results
Weight was significantly lower in the PGX group compared to control at 3 (−1.6 kg [0.57, 2.67, p = 0.003]), 6 (−2.6 kg [1.01, 4.13, p = 0.001]) and 12 months (−2.6 kg [0.59, 4.64, p = 0.012]) and in the PSY group compared to control group at 3 (−1.1 kg [0.07, 2.12, p = 0.037]) and 6 months (−2.4 kg [0.95, 3.93, p = 0.002]). This was a difference of − 2.8% for the PGX group and − 1.5% for the PSY group compared to control after 12 months supplementation. Body Fat was significantly lower in PGX compared to control at 6 (−1.8 kg [0.63, 2.95, p = 0.003]) and 12 months (−1.9 kg [0.43, 3.36, p = 0.012]) and in PSY compared to control at 6 (−1.9 kg [0.84, 3.04, p = 0.001]) and 12 months (−1.4 kg [0.08, 2.71, p = 0.038]).
Conclusions
PGX was better than PSY at maintaining dietary changes and weight loss over the 12 month intervention period, with no change to exercise. A simple strategy of PGX supplementation may offer an effective solution to long-term weight-loss and then management without the need for other nutrient modification.