Week 12: Soybeans Flashcards
Where are soybeans native to?
Asia
Unfermented soy foods
Fermented soy foods
- miso
- natto
- tempeh
- soy sauce
What is used for soy fermentation?
bacteria, yeast or mold
Fortified soy foods
Soybean protein
- Can replace animal based foods - less fat and cholesterol - can replace without adjusting major ways of eating
- Similar to meat egg and milk protein
Protein content of different beverages
Soybean iron
Differences between heme iron and non-heme iron
The way our bodies absorb these two types of iron is different heme iron is more bioavailable so more readily digested and absorbed and non-heme is less readily absorbed so less bioavailable. Soy is high in protein but not as bioavailable
Soybean lipid profile
Good source of fats, and saturated fats do not make up the majority
Soy sauce
Fermented paste of boiled soy, roasted wheat or barley and brine and aspergillosis fungus. Good for you but high in sodium so needs to be used in moderation
Soy foods in the western diet
Highly processed foods are the most consumed sadly
fortified soy beverage
In Canada Soy must be called soy beverage not milk to not confuse consumers
Why is soy beverage recommended over other fortified plant beverages?
When fortified similar to cows milk but also lower cholesterol and saturated fat content
How is soy beverage made?
Puréing soaked dried soy beans and then filtering out liquid.
What is tofu?
Soybean curd - soy milk curdled with coagulant
Possible coagulants for tofu
difference between soft and firm tofu
Nutrition of tofu
Soy isoflavins
What are isoflavins?
Class of phytoestrogen plant derived compounds with estrogenic activities.
The two major soy isoflavones
How do soy isoflavones work?
- Can bind to estrogen receptors throughout the body such as breast tissue and prostate glands, bones, liver, heart brain - everywhere.
- Can mimick the effects of estrogen in some tissues and can block effects of estrogen in other tissues
How might soy isoflavones act like estrogen and anti-estrogen
- estrogen: May protect bones from getting fragile
- anti-estrogen: Estrogen in body stimulates the growth of breast and breast cancer cells if she consumes soy and the isoflavone act as antagonists then may protect against breast cancer
Soy consumption and health
Soy amoung breast cancer survivors
Verdict on soy
Which types of soy are healthy?
Highly processed soybean products
Health claims for soy protein
allow health claims that is decrease heart disease and lowers cholesterol
