hi debbie,

You should be able to buy plain, unflavoured soy protein powder at any health food store. Look for isolated soy, should be 90% protein. Loblaws Supterstore has it in bags, where they sell the other protein powders and shake mixes (usually on the bottom shelf, because it's cheap --- they want to be sure the expensive products are handy at eye level .. ) Some brands of soy protein, eg. Swiss Naturals, also have some lecithin added, which is fine. Just make sure it's zero carbs.

Doreen