Lallemand Bio-Ingredients Lalmin^®Se1000 is an inactivated whole cell yeast (Saccharomyces cerevisiae) product containing elevated levels of the essential trace element selenium in its natural food form, L(+)selenomethionine (SeMet). It is produced by growing yeast in the presence of measured amounts of selenium. Live yeast cells absorb selenium and biochemically transform it into L(+)selenomethionine and other seleno-proteins. Selenomethionine is naturally found in edible plant protein and is highly bioavailable. It is the most suitable form of selenium for nutritional supplementation