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Soy

Also indexed as:Protein (Soy), Soy Protein
Soy: Main Image

Soy, a staple food in many Asian countries, contains valuable constituents, including protein, isoflavones, saponins, and phytosterols. Soy protein provides essential amino acids. When eaten with rice, soy provides protein comparable with that found in animal products. Soy is low in fat and cholesterol-free.

  • Reliable and relatively consistent scientific data showing a substantial health benefit.
  • Contradictory, insufficient, or preliminary studies suggesting a health benefit or minimal health benefit.
  • For an herb, supported by traditional use but minimal or no scientific evidence. For a supplement, little scientific support.

Our proprietary "Star-Rating" system was developed to help you easily understand the amount of scientific support behind each supplement in relation to a specific health condition. While there is no way to predict whether a vitamin, mineral, or herb will successfully treat or prevent associated health conditions, our unique ratings tell you how well these supplements are understood by the medical community, and whether studies have found them to be effective for other people.

For over a decade, our team has combed through thousands of research articles published in reputable journals. To help you make educated decisions, and to better understand controversial or confusing supplements, our medical experts have digested the science into these three easy-to-follow ratings. We hope this provides you with a helpful resource to make informed decisions towards your health and well-being.

This supplement has been used in connection with the following health conditions:

Used for AmountWhy
High Cholesterol
25 grams soy protein per day3 stars[3 stars]
Soy supplementation has been shown to lower cholesterol. Soy contains isoflavones, which are believed to be soy's main cholesterol-lowering ingredients.
Hypertension
10 grams soy protein or 16 ounces soy milk twice per day3 stars[3 stars]
Supplementing with soy protein may significantly lower blood pressure.
Athletic Performance and Exercise Recovery
33 to 40 grams daily2 stars[2 stars]
In one study, elderly men participating in a strength training program who took a supplement containing protein (part of which was soy protein) immediately following exercise saw significant gains in muscle growth and lean body mass.
Menopause
Refer to label instructions 1 star[1 star]
Some research has found soy isoflavones may help reduce certain menopause symptoms, such as hot flashes, and support mood and thinking performance.
Obesity
Refer to label instructions 1 star[1 star]
Soy appears to have several effects on the body that might help with weight loss.
Premenstrual Syndrome
Refer to label instructions 1 star[1 star]
Supplementing with soy protein may help relieve premenstrual swelling and cramping.

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The information presented in Aisle7 is for informational purposes only. It is based on scientific studies (human, animal, or in vitro), clinical experience, or traditional usage as cited in each article. The results reported may not necessarily occur in all individuals. Self-treatment is not recommended for life-threatening conditions that require medical treatment under a doctor's care. For many of the conditions discussed, treatment with prescription or over the counter medication is also available. Consult your doctor, practitioner, and/or pharmacist for any health problem and before using any supplements or before making any changes in prescribed medications. Information expires June 2015.