Welcome to the FitLife Nutrition Blog! Here you will find tips, recipes, and information about nutrition to fuel your busy lifestyle. Enjoy!

Moderated by:
Prashila Mistry, MS, RD, CLEC
FitLife Registered Dietitian
email: psmistry@ucsd.edu

Tuesday, March 24, 2015

Tips on Tofu

Tofu is a lean vegetarian source of protein. It is considered the chameleon of foods, which stems from its versatility in textures and ability to absorb any type of flavor. What is tofu really, and where does it come from?

Tofu, otherwise known as bean curd, is a product made from soybeans, water, and coagulant that undergoes a similar process as that of cheese.  Originally from China, tofu has made its way around the world, and today it can be found almost anywhere in a variety of textures. There are four different varieties of tofu one can choose from: silken, soft, firm, and extra firm tofu, all of which contain a high nutritional value.
Image source: http://thescienceofeating.com

TYPE
TEXTURE
IDEAL FOR…
Silken
Creamy
Dips & Spreads
Soft
Gelatin-like
Desserts
Firm

General Cooking
Extra Firm
Rubbery
General Cooking

Some of the health benefits of tofu are a high protein and calcium content, B-vitamins, iron, isoflavones, low in sodium and fat, low calorie, and it is easily digested, all which make tofu a super packed dietary item (1).

Studies suggest that having a varied diet, especially one that limits saturated or animal fats, can lead to reduced risk of cardiovascular disease (3). As a plant-based product, tofu is naturally cholesterol free and contains very little saturated fat.  It is chock full of nutritional benefits for overall health.  It is easy to see why so many people include tofu in their diet.

          TOFU VS. MEAT   (4oz. servings)

TOFU
MEAT
Extra Firm
Soft
Ground Beef (80% lean)
Chicken Breast
(Skinless)
Fish
(Tilapia)
Calories
103
62
284
184
109
Protein (g)
11.2
5.4
19.2
34.5
22.8
Fat (g)
6.6
3.1
22.4
4.0
1.9
Saturated Fat (g)
0.6
0.4
8.6
1.1
0.6
Cholesterol (mg)
0
0
80
94
57
Sodium (mg)
9
6
75
444
59
Calcium (%DV)
20%
4%
2%
2%
1%
Iron (%DV)
12%
5%
12%
6%
4%

Tofu can be a versatile addition to one's diet, especially for vegetarians and vegans since it supplies them with protein and various nutrients their diet may lack otherwise.  Tofu is not only for vegetarians and vegans though.  Even the pickiest of carnivores can enjoy tofu if prepared to satisfy their own tastes; which can be rather easy since there are a plethora of ways tofu can be prepared and a wide-range of cuisines it can be incorporated into.  It is all a matter of experimenting with what textures and flavors work best for you.

Despite all of the benefits of tofu, there has been some controversy surrounding it. There is speculation that high levels of soy may contribute to some types of cancer. However, studies conclude that no actual evidence correlates this soybean-derived product to increased risks of cancer (2). On the contrary, these same studies suggest that some of the compounds found within tofu, or soybean derived products, are beneficial in the prevention of certain types of cancer (2).

Now, let’s dive in to the proper way to handle and cook tofu.  There are many different styles for cooking tofu and each utilizes a specific variety of tofu to make cooking it easier and better, it all depends on the recipe. However, tofu has to be prepped before being cooked, since it comes packaged in a container with water to help retain its freshness. This excess water can interfere with the flavoring and cooking process of the tofu, so a series of different steps are necessary in order to prepare the soft, firm, and extra firm tofu to its fullest potential.

Tofu Preparation Steps:

1. Drain the water in package.
2. Rinse the block of tofu carefully.
3. Dry the block of tofu by patting with a paper towel.
4. Freezing and thawing (optional, this provides the tofu with a more chewy texture).*
5. Press (duration varies; this helps remove excess water the tofu absorbed when packaged).*
6. Steam (for raw tofu, it helps decontaminate the tofu in the case it contains any bacteria).
7. Marinate (optional, can be either with a wet or dry rub; duration varies).
*For soft tofu, steps 4 & 5 are not necessary.
**Step 5, pressing the tofu can be done in two of the following manners. One way is to use a tofu presser, a device designed to squeeze excess water out of the tofu, or the other option is to use any heavy object you have available to act as a presser. For the second option, the tofu should be wrapped in paper towels and place on a level surface. Then you should place a plate on top of the tofu in order to create another flat surface on where you can place your heavy object and finish creating your own DIY tofu presser. For either method used to remove the excess water from the tofu, you should let it sit for about an hour in order to remove enough water. However, the longer the pressing of tofu takes, the better the removal of excess moisture and the less the moisture will interfere with your cooking; giving you as a result a tofu that is better at absorbing flavors.

Once the tofu is prepped you can ignite your creativity and start cooking with this highly versatile food item that can give you a wide variety of dishes due to its neutral slate and its ability to mimic any flavor you give to it. So now the sky is the limit for you to go ahead and experiment with flavors and styles of cooking this multipurpose food item we all know as tofu!

Extra Tips and Tricks:
  • The smaller you cube/cut the tofu, the better the crisp or absorbency of flavor.
  • Silken or Soft tofu can be used as a thickening agent.
Recipe Ideas:

Breakfast Tofu Scramble

Ingredients to serve 4 people:
  • 2 14-ounce containers extra-firm tofu, crumbled
  • ¼ cup nutritional yeast
  • 1 teaspoon sea salt
    Image source: berrybundle.wordpress.com
  • 1 teaspoon ground cumin
  • 1 teaspoon ground turmeric (gives the scramble a yellow color)
  • freshly ground black pepper to taste
  • 2 Tablespoons unrefined, cold-pressed olive oil, divided
  • 1 small onion, diced
  • ½ red bell pepper, diced
  • 1 medium tomato, diced
*Suggested accompaniments: sprouted or whole grain tortillas, sliced avocado or guacamole, chopped fresh cilantro, sliced scallions

Directions:
  • In a large bowl, mix together the tofu, yeast flakes, salt, cumin, turmeric and black pepper. 
  • Heat 1 Tablespoon oil in a large skillet over medium heat.  Add the onion and red pepper and sauté until the onion is tender and translucent.  Add the tofu mixture.  Mix until well combined.(You can do all of this the night before and keep refrigerated). 
  • Cook the tofu scramble until heated through and slightly golden brown.  Fold in the tomato. 
  • Serve warm with desired accompaniments or rolled up in a tortilla for a breakfast burrito. 
http://pamelasalzman.com/tex-mex-tofu-scramble-recipe/#sthash.g97X7ASM.dpuf

Tofu Chocolate Mousse

Ingredients:
  • 7oz Silken or Soft Tofu
    image source:  tofufortwo.net
  • 3.5-4oz Melted Dark Chocolate Chips*
  • 4 tsp. Agave Nectar
  • ½ tsp. Vanilla Extract (optional)
*Heat in microwave until melted; melt in intervals of 15
  seconds so chocolate doesn’t burn. Can also use the
  Bain Marie technique to melt the chocolate.

Directions:
  • Blend everything together in a food processor or blender
  • Serve in small cups and chill
  • Garnish with desired toppings
References:
(1): http://www.veg-world.com/articles/tofu.htm
http://www.soya.be/what-is-tofu.php
(2): http://www.ncbi.nlm.nih.gov/pubmed/24053483
http://www.ncbi.nlm.nih.gov/pubmed/23812102
http://www.ncbi.nlm.nih.gov/pubmed/25201305
(3): http://www.ncbi.nlm.nih.gov/pubmed/24304234

Guest blog entry submitted by UC San Diego student and dietetic hopeful, Karla Parra and edited by UC San Diego FitLife Dietitian, Prashila Mistry, MS, RD, CLEC.

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