Is the yeast in bread and beer the same? . And how can I use the dry bread yeast to gain weight?

Different strains. Brewer's yeast and baker's yeast are different strains of yeast, from the same species of yeast. To use the dry bread yeast commonly sold in grocery stores, it takes a bit of work, but can be rewarding. First, mix it into flour, water, and a little salt. Knead it and leave it to rise. Afterwards, bake it in an oven until done. The result is scrumptious homemade bread, full of weight-gaining carbs!