Australian researchers found significant positive changes in serum markers in overweight and obese men supplemented with psyllium post-prandially. A single dose of psyllium caused a decrease in arterial exposure to TAG and modified chylomicron responses.
Source: Khossousi A, Binns CW, Dhaliwal SS, and Pal S. "The acute effects of psyllium on postprandial lipaemia and thermogenesis in overweight and obese men." British Journal of Nutrition (2008), 99:1068-1075 Cambridge University Press. doi: 10.10171S0007114507864804