High-quality, pure stevia extracts are considered safe for humans by the FDA. Crude extracts are not recognized as completely safe or advised for supplement use. Supplements containing pure stevia extracts are available in powder, liquid, granular, and tablet forms. The use of a stevia form is a personal choice and can depend on the need too. While liquids or tablets are portable and easy to mix into beverages, granular or powder forms are suitable for cooking or baking where measurements are crucial to get a dish right.