soy protein

Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.


(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 consistency score increased significantly with an increased level of soy protein isolate.
Regardless of the textured soy protein option used, one size definitely doesn't fit all.
Thus, the soy protein ingredients market has been gaining global acceptance among consumers.
The new report: "Soy Protein Ingredients Market (Soy Isolates, Soy Flour, Concentrates) Market by Types, Applications and Geography--Global Trends and Forecasts up to 2017" published by MarketsandMarkets delves into an in-depth discussion of the global soy protein ingredient market, categorizing it on the basis of applications, types, and geography; as well as forecasting volume & revenue for soy protein ingredients and analyzing trends in each of these submarkets.
The study involved 313 healthy postmenopausal women between the ages of 45 and 92 were given 25 grams of soy protein daily, a dose comparable to that of traditional Asian diets, or a milk protein-matched placebo.
In contrast, our clinical trial directly compares soy protein on blood pressure and shows that it lowers blood pressure better than carbohydrates.
Soy protein's ability to lower total and LDL--or 'bad'--cholesterol has been extensively studied, but the mechanism that enables soy protein to actually effect this change is not entirely understood.
The subjects received dietary advice on either a low saturated fat therapeutic diet (control) or a dietary portfolio, "for which counseling was delivered at different frequencies, that emphasized dietary incorporation of plant sterols, soy protein, viscous fibers, and nuts.
Infants with cow milk protein-induced enteropathy or enterocolitis are frequently as sensitive to soy protein and should not be given soy protein-based formula.
The source of soy protein in this study was a half cup of unsalted dry roasted soy nuts containing 25 g soy protein and 101 mg of aglycone isoflavones (genistein, daidzein and glycitein).
The women who ate half a cup of roasted soy nuts, those little hard snacks you can find in health food stores, had better results than women who ate either meat or soy protein.