(a) To pay attention to check the production date of the product
Because yeast is a microorganism, only under certain conditions to preserve a certain amount of time, beyond the shelf life, its biological activity will be reduced, and even lost biological activity.
(ii) to buy the hard yeast of the bag
Because the active dry yeast is particularly sensitive to oxygen, the use of aluminum foil multilayer composite vacuum sealing filled with nitrogen packaging, yeast itself and air completely isolated, it can be preserved for a long time.
(iii) to buy yeast suitable for bread formulation requirements
The same brand of active dry yeast, there are different packaging color or printed with different text to distinguish between the appropriate formula for the bread products.
(iv) Rigorous sensory examination
When buying fresh yeast, such yeast can not be used when the yeast surface is moldy, metamorphic, long green hair, and self soluble.