Blyth, Inc. said net sales for the second quarter ended July 31, 2011 increased approximately 17% to $185.5 million due to significant year-over-year growth at ViSalus Sciences, the company’s weight management/nutritional supplement/energy drink unit of which it owns 57.5%. Sales increased 13% on a local currency basis. International sales represented 44% of second quarter sales both this year and last year, the company said. Operating profit for the second quarter was a loss of $2.6 millio...