Soy Soy Soy. What is it good for? Soy. What is it good for?

1. Which nutrient group 1. Which nutrient group does soy belong too?does soy belong too?

Protein Protein

2. What % of soy is made of 2. What % of soy is made of this nutrient?this nutrient?

Protein - 37- 40%Protein - 37- 40% Carbs – 30%Carbs – 30% Lipids – 20%Lipids – 20% HH22O – 8%O – 8% Trace amount of vitamins & mineralsTrace amount of vitamins & minerals

3. Which foods does soy 3. Which foods does soy serve as a replacement for? serve as a replacement for? Animal products (meat & dairy Animal products (meat & dairy

group)group)

4. List at least 5 foods that 4. List at least 5 foods that contain soy.contain soy.

Tofu Tofu TacosTacos Baby formulaBaby formula BurgersBurgers Milk Milk Also, used extensively in school lunch Also, used extensively in school lunch

programs, commercial baked goods, programs, commercial baked goods, fast food products and diet beverages. fast food products and diet beverages.

5. List some possible 5. List some possible negatives effects of soy negatives effects of soy

consumption.consumption. Increase the risk of breast cancerIncrease the risk of breast cancer Affect brain function in men Affect brain function in men Lead to hidden developmental ab-Lead to hidden developmental ab-

normalities in infantsnormalities in infants Raise estrogen levelsRaise estrogen levels Alter sexual development (in animals) Alter sexual development (in animals) Change the timing of a woman’s Change the timing of a woman’s

menstrual cycle menstrual cycle

6. Which hormone is 6. Which hormone is affected by soy?affected by soy?

Estrogen Estrogen

The Good, The Bad, The The Good, The Bad, The UglyUgly

7. Soy beans are “good” because they 7. Soy beans are “good” because they are high in phytochemicals/isoflavones. are high in phytochemicals/isoflavones.

What are their function in the body?What are their function in the body?

Relieve certain Relieve certain menopausal symptomsmenopausal symptoms

cancer preventioncancer prevention slowing or reversing slowing or reversing

osteoporosisosteoporosis reduce the risk of reduce the risk of

heart diseaseheart disease

8. Soybeans are “bad” because they 8. Soybeans are “bad” because they contain phytic acid. What does phytic contain phytic acid. What does phytic

acid do to the body? acid do to the body? Phytic acid is also Phytic acid is also

called an anti-nutrient called an anti-nutrient Soybeans have higher Soybeans have higher

levels of phytic acid levels of phytic acid than any other legumethan any other legume

It must also be noted It must also be noted that this may be of that this may be of particular concern with particular concern with regard to babies who regard to babies who are using soy-based are using soy-based infant formulas.infant formulas.

9. What is crop rotation?9. What is crop rotation? Crop rotation or Crop sequencing is the Crop rotation or Crop sequencing is the

practice of growing a series of dissimilar practice of growing a series of dissimilar types of crops in the same area in types of crops in the same area in sequential seasons for various benefits sequential seasons for various benefits such as to avoid the build up of pathogens such as to avoid the build up of pathogens and pests that often occurs when one and pests that often occurs when one species is continuously cropped. species is continuously cropped.

Crop rotation also seeks to balance the Crop rotation also seeks to balance the fertility demands of various crops to avoid fertility demands of various crops to avoid excessive depletion of soil nutrients. excessive depletion of soil nutrients.

10. What is the relationship 10. What is the relationship between crop rotation, soy between crop rotation, soy

and corn?and corn? Soy replaces nitrogen in the soil so it Soy replaces nitrogen in the soil so it

is usually paired up with corn and/or is usually paired up with corn and/or wheatwheat

11. How are crop rotation, 11. How are crop rotation, HFCS use and the use of HFCS use and the use of

soy all related?soy all related? A farmer can rotate corn for HFCS A farmer can rotate corn for HFCS

and soy for use as a “protein and soy for use as a “protein substitute” in other foodssubstitute” in other foods

Economically drivenEconomically driven

12. In Part 1, # 5, you listed some negative 12. In Part 1, # 5, you listed some negative effects of soy consumption. Other countries effects of soy consumption. Other countries

that consume soy don’t have these problems. that consume soy don’t have these problems. Why is the consumption of soy so high in this Why is the consumption of soy so high in this

country?country? Soy is used in other products too. Soy is used in other products too.

13. Are soy beans digestible by 13. Are soy beans digestible by humans in their natural, humans in their natural,

unprocessed state?unprocessed state? No No

14. What deficiencies can soy 14. What deficiencies can soy actually cause? (HINT: minerals, actually cause? (HINT: minerals,

enzymes, growth..)enzymes, growth..) Deficiencies of magnesium, calcium, Deficiencies of magnesium, calcium,

iron and zinc. iron and zinc. Enzyme-inhibitors block uptake of Enzyme-inhibitors block uptake of

trypsin and other enzymes which the trypsin and other enzymes which the body needs for protein digestion. body needs for protein digestion.

Harmful antinutrients which can cause Harmful antinutrients which can cause serious gastric distress, reduced protein serious gastric distress, reduced protein digestion and can lead to chronic digestion and can lead to chronic deficiencies in amino acid uptake. deficiencies in amino acid uptake.

Hemagglutinin and trypsin inhibitors Hemagglutinin and trypsin inhibitors are both "growth depressant" are both "growth depressant" substances. substances.

15. What is being done in 15. What is being done in the lab to fix these the lab to fix these deficiency issues?deficiency issues?