Active dry yeast loses about 25 percent of its cells during processing, so instant yeast is more potent. Instant yeast is also quicker to activate and quicker to promote rising.
Instant Yeast for Bread
Rs. 180.00
When using active dry yeast, you need to first hydrate the yeast in warm water and let it sit for several minutes until it "blooms," or becomes fizzy. With instant yeast, there's no need to hydrate; just add the yeast directly to the other dry ingredients of the dough. The dough will not suffer if you do hydrate instant yeast in the same way as active dry, however.
How Instant Yeast Works
Instant yeast works more rapidly than active dry yeast. You won't notice immediate rising once you mix up your dough, but you should check its progress earlier than your recipe recommends. Instant yeast may cut the total rising time of your dough in half.