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Lijnzaad tegen hoog cholesterol en overgewicht*
Uit een kleine studie blijkt dat lijnzaad in de voeding goed kan helpen het cholesterol te verlagen en te zorgen voor een goed gewicht. De deelnemers in de studie kregen 7 dagen lang of een vezelarmdieet (de controlegroep), of een een dieet met 3x daags een drank van lijnzaad of een dieet met 3x daags brood van lijnzaad. Zij met de lijnzaaddrank bleken na een week 12% lagere totaal cholesterolwaarden te hebben en 15% minder slecht cholesterol (LDL) dan de deelnemers in de controlegroep. In de groep met lijnzaadbrood waren deze verlagingen resp. 7% en 9%. In de groep met de lijnzaaddrank bleek de gemiddelde vetuitscheiding in de ontlasting wel 50% hoger te zijn dan in de controlegroep. In de groep met lijnzaadbrood was dit 18% hoger.
Flaxseed dietary fibers lower cholesterol and increase fecal fat excretion, but magnitude of effect depend on food type 
Mette Kristensen, Morten G Jensen, Julie Aarestrup, Kristina EN Petersen, Lise Sondergaard, Mette S Mikkelsen and Arne Astrup 
Nutrition & Metabolism 2012, 9:8 doi:10.1186/1743-7075-9-8
Abstract (provisional)
Background
Dietary fibers have been proposed to play a role in cardiovascular risk as well as body weight management. Flaxseeds are a good source of dietary fibers, and a large proportion of these are water-soluble viscous fibers. 
Method
Here, we examine the effect of flaxseed dietary fibers in different food matrices on blood lipids and fecal excretion of fat and energy in a double-blind randomized crossover study with 17 subjects. Three different 7-d diets were tested: a low-fiber control diet (Control), a diet with flaxseed fiber drink (3/day) (Flax drink), and a diet with flaxseed fiber bread (3/day) (Flax bread). Total fat and energy excretion was measured in feces, blood samples were collected before and after each period, and appetite sensation registered 3 times daily before main meals. 
Results
Compared to control, Flax drink lowered fasting total-cholesterol and LDL-cholesterol by 12 and 15%, respectively, (p<0.01), whereas Flax bread only produced a reduction of 7 and 9%, respectively (p<0.05). Fecal fat and energy excretion increased by 50 and 23% with Flax drink consumption compared to control (p<0.05), but only fecal fat excretion was increased with Flax bread compared to control (p<0.05). 
Conclusion
Both Flax drink and Flax bread resulted in decreased plasma total and LDL-cholesterol and increased fat excretion, but the food matrix and/or processing may be of importance. Viscous flaxseed dietary fibers may be a useful tool for lowering blood cholesterol and potentially play a role in energy balance. Trial registration: The study was registered in the clinicaltrials.gov database: NCT00953004.

De studie. (Februari 2012)