The swiss-based health-care group Roche sold its vitamin division to Dutch-based DMS.The Roche diviion was the world's leading supplier of vitamins,but Roche wanted to concentrate on its pharmaceuticals and diagnostics division.DMS is pleased with its acquistion because it allows it to concentrate on life science products and performane products,both products in high-growth markets.In terms of portfolio strategy,the Roche vitamin division was most likely an example of a: