This company's products contain all-natural ingredients and no artificial preservatives. You can also find information on their FAQ questions page regarding the fact that their products are gluten-free, dairy-free, vegan and contain no GMOs.
Ingredients listed include: WATER, WHOLE SOYBEANS, CALCIUM SULFATE, MAGNESIUM CHLORIDE.
For more information, contact: Azumaya or 1-800-VITASOY.
Their website contains a variety of links such as product and nutritional information, where to find them and some recipes to begin your tofu adventure! Depending on your cooking needs, their products also come in the following versions: EXTRA FIRM, FIRM, and LITE EXTRA FIRM.
Good luck and keep me posted on any easy recipes you'd like to share.