Acute Effects of a Spinach Extract Rich in Thylakoids on Satiety: A Randomized Controlled Crossover Trial.

Authors:
Candida J Rebello
Candida J Rebello
Louisiana State University System
United States
Jessica Chu
Jessica Chu
The University of Hong Kong
Hong Kong
Robbie Beyl
Robbie Beyl
Louisiana State University
United States
Dan Edwall
Dan Edwall
Doktor Edwall AB
Frank L Greenway
Frank L Greenway
Louisiana State University System
United States

J Am Coll Nutr 2015 1;34(6):470-7. Epub 2015 Jun 1.

a Pennington Biomedical Research Center.

Objective: By retarding fat digestion, thylakoids, the internal photosynthetic membrane system of green plants, promote the release of satiety hormones. This study examined the effect of consuming a single dose of concentrated extract of thylakoids from spinach on satiety, food intake, lipids, and glucose compared to a placebo.

Design: Sixty overweight and obese individuals enrolled in a double-blind randomized crossover study consumed the spinach extract or placebo in random order at least a week apart. Blood was drawn for assessments of lipids and glucose before a standard breakfast meal, followed 4 hours later by a 5 g dose of the extract and a standard lunch. Visual analog scales were administered before lunch and at intervals until an ad libitum pizza dinner served 4 hours later. Two hours after lunch a second blood draw was conducted. Mixed models were used to analyze response changes.

Results: Compared to placebo, consuming the spinach extract reduced hunger (p < 0.01) and longing for food over 2 hours (p < 0.01) and increased postprandial plasma glucose concentrations (p < 0.01). There were no differences in plasma lipids and energy intake at dinner, but males showed a trend toward decreased energy intake (p = 0.08).

Conclusions: At this dose, the spinach extract containing thylakoids increases satiety over a 2-hour period compared to a placebo. Thylakoid consumption may influence gender-specific food cravings.

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Source
http://dx.doi.org/10.1080/07315724.2014.1003999DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4600649PMC

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