soy protein

(redirected from Soy protein isolate)
Also found in: Acronyms.


(soi) ,

glycine max

(trade name),

soy protein

(trade name),


(trade name)


Therapeutic: antioxidants
Menopausal symptoms.Prevention of breast, lung, endometrial, thyroid and prostate cancers.Hyperlipidemia.


Soy is the most significant dietary source of isoflavones. Pharmacologic effects of soy include lowering of homocysteine levels, inhibition of platelet aggregation, lowering of blood pressure, inhibition of cholesterol absorption in the small bowel and lowering of LDL cholesterol. Soy isoflavones also have antioxidant, antiproliferative and estrogenic effects.

Therapeutic effects

Decreased cholesterol.
Decreased hot flashes in menopausal women.


Absorption: Unknown
Distribution: Unknown
Metabolism and Excretion: Unknown
Half-life: Unknown

Time/action profile



Contraindicated in: Hypersensitivity.End stage renal disease.Urinary bladder cancer (may increase risk).
Use Cautiously in: Nephrolithiasis.Hypothyroidism.

Adverse Reactions/Side Effects


  • insomnia


  • bloating
  • constipation
  • gastrointestinal upset


Antibiotics may ↓ effects of soy. May inhibit effects of estrogens and tamoxifen.May ↑ risk of hypertensive crisis with MAO inhibitors.May ↓ INR of patients taking warfarin. None.
Oral (Adults) 35–120 mg/day.


Tablets: Powder:

Nursing implications

Nursing assessment

  • Monitor blood pressure prior to and periodically during therapy.
  • Hypercholesterolemia: Obtain a diet history, especially with regard to fat consumption.
  • Menopausal symptoms: Assess the frequency and intensity of hot flashes prior to and periodically during therapy.
  • Lab Test Considerations: Monitor blood glucose, lipid profile, hormones, and thyroid function before and periodically during therapy.

Potential Nursing Diagnoses

Deficient knowledge, related to diet and medication regimen (Patient/Family Teaching)


  • Oral: Administer as directed.

Patient/Family Teaching

  • Instruct patient to take as directed.
  • Instruct patient to notify health care professional of all Rx or OTC medications, vitamins, or herbal products being taken and to consult with health care professional before taking other medications.

Evaluation/Desired Outcomes

  • Decrease in frequency and intensity of hot flashes.
  • Reduction in serum cholesterol levels.

soy protein

A type of vegetable protein found in food products derived from soybeans. Soy-based foods also contain fiber, flavones, phytoestrogens, and other potentially beneficial components. See: soy milk; tofu
See also: protein
References in periodicals archive ?
The tensile strength of the soy protein isolate film samples, with rutin and epicatechin added respectively, was similar at 35.
However, the use of commercial soy protein isolates as ingredients in acidic beverages is limited by their poor solubility at low pH.
Because of its high protein content (typically 90 percent or greater), soy protein isolate is especially attractive to processors who want to make this soy health claim for their products.
Researchers have evaluated some promising ways that can be used to reduce the odor or flavor of CGM and at the same time increase its emulsifying capacity to make it similar to soy protein isolate (SPI).
The research on bile acid binding showed only slight activity for Burcon's proteins, which was not statistically different than that of soy protein isolate.
Soy protein isolate is usually stored as a dry powder.
Investigators undertook a limited enzymatic hydrolysis: 2% and 4% degree of hydrolysis (DH) of soy protein isolate, concentrate, extruder-expelled (EE) flour and hexane-extracted soy flour.
Solbar Industries has launched Solpro 900, a new soy protein isolate for infant formula, nutritional foods and beverages and emulsified meat and poultry products.
Their objective was to determine the effect of xylitol, soy protein isolate, inulin and resistant starch on the cooking properties of corn starch.