Product Images
GNC SuperFoods Soy Isoflavone Concentrate - GNC - GNC Zoom
Product Videos

GNC SuperFoods Soy Isoflavone Concentrate

Shop all GNC SuperFoods

90 Capsules

Item #420013 See Product Details

Price: $16.99

Member Price: $15.29 Become a Member

Availability: In Stock Details

Available Promotions:

  • Buy One Get One 50% Off Mix and Match Wellness BOGO! Details
  • $3.99 Flat Rate Shipping! Details

Auto-Delivery Available

Sign Up & Save! Enroll in Auto-Delivery and lock in your price for 12 months.

Learn More

Price: $16.99

Member Price: $15.29 Become a Member
Ship every:
Add to Cart
People Who Buy This Also Bought
You May Also Be Interested In
More Sizes Available
Description
  • Support for bone and heart health*
Emerging research indicates that soy isoflavones can help maintain healthy bone density and support heart health.* SuperFoods Soy Isoflavone Concentrate uses only Non-Genetically Modified (Non-GMO)soybeans that have not been altered to raise or enhance the level of naturally occurring isoflavones.

* These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

Supplement Facts

As a dietary supplement, take one capsule daily.

Serving Size 1 Capsules
Servings Per Container 90
Amount Per Serving % DV
Soy Isoflavone Concentrate (40% Isoflavones = 20 mg) 50.00 mg **
** Daily Value (DV) not established

Other Ingredients: Dicalcium Phosphate, Gelatin, Cellulose

No Sugar, No Starch, No Artificial Colors, No Artificial Flavors, Sodium Free, No Wheat, No Gluten, No Corn, No Dairy, Yeast Free

Warning: Consult your physician prior to using this product if you are pregnant, nursing, taking medication, or have a medical condition. Discontinue use two weeks prior to surgery.

Distributed by: General Nutrition Corporation Pittsburgh, Pa 15222

Health Notes

Soy

Soy
This nutrient has been used in connection with the following health goals
  • 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:

High Cholesterol
Dose: 25 grams soy protein per day
Soy supplementation has been shown to lower cholesterol. Soy contains isoflavones, which are believed to be soy's main cholesterol-lowering ingredients.(more)
Hypertension
Dose: 10 grams soy protein or 16 ounces soy milk twice per day
Supplementing with soy protein may significantly lower blood pressure.(more)
Premenstrual Syndrome
Dose: Refer to label instructions
Supplementing with soy protein may help relieve premenstrual swelling and cramping.(more)
Menopause
Dose: Refer to label instructions
Some research has found soy isoflavones may help reduce certain menopause symptoms, such as hot flashes, and support mood and thinking performance.(more)
Obesity
Dose: Refer to label instructions
Soy appears to have several effects on the body that might help with weight loss.(more)
Menopause
Dose: Refer to label instructions
Some research has found soy isoflavones may help reduce certain menopause symptoms, such as hot flashes, and support mood and thinking performance.(more)
Premenstrual Syndrome
Dose: Refer to label instructions
Supplementing with soy protein may help relieve premenstrual swelling and cramping.(more)
Athletic Performance and Exercise Recovery
Dose: 33 to 40 grams daily
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.(more)
High Cholesterol
Dose: 25 grams soy protein per day

Soy supplementation has been shown to lower cholesterol in humans.1 Soy is available in foods such as tofu, miso, and tempeh and as a supplemental protein powder. Soy contains isoflavones, naturally occurring plant components that are believed to be soy's main cholesterol-lowering ingredients. A controlled trial showed that soy preparations containing high amounts of isoflavones effectively lowered total cholesterol and LDL ("bad") cholesterol, whereas low-isoflavone preparations (less than 27 mg per day) did not.2 However, supplementation with either soy3 or non-soy isoflavones (from red clover)4 in pill form failed to reduce cholesterol levels in a group of healthy volunteers, suggesting that isoflavone may not be responsible for the cholesterol-lowering effects of soy. Further trials of isoflavone supplements in people with elevated cholesterol, are needed to resolve these conflicting results. In a study of people with high cholesterol levels, a soy preparation that contained soy protein, soy fiber, and soy phospholipids lowered cholesterol levels more effectively than isolated soy protein.5

References

1. Carrol KK, Kurowska EM. Soy consumption and cholesterol reduction: review of animal and human studies. J Nutr 1995;125:594-7S.

2. Crouse JR 3rd, Morgan T, Terry JG, et al. A randomized trial comparing the effect of casein with that of soy protein containing varying amounts of isoflavones on plasma concentrations of lipids and lipoproteins. Arch Intern Med 1999;159:2070-6.

3. Nestel PJ, Yamashita T, Sasahara T, et al. Soy isoflavones improve systemic arterial compliance but not plasma lipids in menopausal and perimenopausal women. Arterioscler Thromb Vasc Biol 1997;17:3392-8.

4. Samman S, Lyons, Wall PM, et al. The effect of supplementation with isoflavones on plasma lipids and oxidisability of low density lipoprotein in premenopausal women. Atherosclerosis 1999;147:277-83.

5. Hoie LH, Morgenstern EC, Gruenwald J, et al. A double-blind placebo-controlled clinical trial compares the cholesterol-lowering effects of two different soy protein preparations in hypercholesterolemic subjects. Eur J Nutr 2005;44:65-71.

Hypertension
Dose: 10 grams soy protein or 16 ounces soy milk twice per day

In a double-blind study of postmenopausal women, supplementing with 10 grams of soy protein twice a day for six weeks significantly reduced diastolic blood pressure by an average of 5 mm Hg, compared with a diet not containing soy protein.1 In another study, men and women with mild to moderate hypertension consumed 500 ml (approximately 16 ounces) of soy milk or cow's milk twice a day for three months. After three months, the average systolic blood pressure had decreased by 18.4 mm Hg in the soy group, compared with 1.4 mm Hg in the cow's milk group. The reductions in diastolic blood pressure were 15.9 mm Hg with soy milk and 3.7 mm Hg with cow's milk.2 In another study of people with hypertension who were consuming a low-protein, low-fiber diet, supplementing with a combination of soy protein and psyllium (a fiber source) lowered systolic blood pressure by an average of 5.9 mm Hg.3 The blood pressure reduction with soy protein alone or with fiber alone was less pronounced than that with combination treatment. Other research has also shown a blood pressure-lowering effect of soy protein.4, 5

References

1. Washburn S, Burke GL, Morgan T, Anthony M. Effect of soy protein supplementation on serum lipoproteins, blood pressure, and menopausal symptoms in perimenopausal women. Menopause1999;6:7-13.

2. Rivas M, Garay RP, Escanero JF, et al. Soy milk lowers blood pressure in men and women with mild to moderate essential hypertension. J Nutr 2002;132:1900-2.

3. Burke V, Hodgson JM, Beilin LJ, et al. Dietary protein and soluble fiber reduce ambulatory blood pressure in treated hypertensives. Hypertension2001;38:821-6.

4. He J, Gu D, Wu X, et al. Effect of soybean protein on blood pressure: a randomized, controlled trial. Ann Intern Med 2005;143:1-9.

5. Welty FK, Lee KS, Lew NS, Zhou JR. Effect of soy nuts on blood pressure and lipid levels in hypertensive, prehypertensive, and normotensive postmenopausal women. Arch Intern Med 2007;167:1060-7.

Premenstrual Syndrome
Dose: Refer to label instructions

In a double-blind trial, supplementing with soy protein (providing 68 mg of isoflavones per day) for two menstrual cycles was significantly more effective than a placebo at relieving premenstrual swelling and cramping.1 The placebo used in this study was cow's milk protein. Some doctors believe that cow's milk, because of its estrogen content, can worsen premenstrual symptoms. If that is the case, then the beneficial effect of soy protein may have been overestimated in this study.

References

1. Bryant M, Cassidy A, Hill C, et al. Effect of consumption of soy isoflavones on behavioural, somatic and affective symptoms in women with premenstrual syndrome. Br J Nutr 2005;93:731-9.

Menopause
Dose: Refer to label instructions

A double-blind study of 78 postmenopausal women (average age, 49.5 years) were randomly assigned to receive 60 mg per day of soy isoflavones (as aglycone) or placebo for six months.1 Then after a one-month break, each woman received the alternate treatment for an additional six months. Thinking (cognitive) performance and mood were assessed by tests at the end of each treatment period. Compared with placebo, people treated with isoflavones experienced significant improvement on 6 of 17 measures of cognitive function and 7 of 8 measures of mood. In another double-blind study, 177 postmenopausal women (average age, 55 years) who were experiencing five or more hot flushes per day were randomly assigned to receive soy isoflavones (50 mg per day total of an approximately equal mixture of isoflavones genistin and daidzin) or placebo for 12 weeks.2 The average reduction in hot flash frequency after 6 weeks was significantly greater in the isoflavone group than in the placebo group; however, during the entire 12 weeks, the difference between the two groups was only marginally significant.

References

1. Casini ML, Marelli G, Papaleo E, Ferrari A, D'Ambrosio F, Unfer V. Psychological assessment of the effects of treatment with phytoestrogens on postmenopausal women: a randomized, double-blind, crossover, placebo-controlled study. Fertil Steril 2006;85:972-8.

2. Upmalis DH, Lobo R, Bradley L, Warren M, Cone FL, Lamia CA. Vasomotor symptom relief by soy isoflavone extract tablets in postmenopausal women: a multicenter, double-blind, randomized, placebo-controlled study. Menopause 2000;7:236-42.

Obesity
Dose: Refer to label instructionsAnimal and human studies have suggested that when soy is used as a source of dietary protein, it may have several biological effects on the body that might help with weight loss.1 A preliminary study found that people trying to lose weight using a meal-replacement formula containing soy protein lost more weight than a group not using any formula.2 However, controlled studies comparing soy protein with other protein sources in weight-loss diets have not found any advantage of soy.3, 4, 5 When soy protein is used for other health benefits, typical daily intake is 20 grams per day or more.
References

1. Bhathena SJ, Velasquez MT. Beneficial role of dietary phytoestrogens in obesity and diabetes. Am J Clin Nutr 2002;76:1191-201 [review].

2. Allison DB, Gadbury G, Schwartz LG, et al. A novel soy-based meal replacement formula for weight loss among obese individuals: a randomized controlled clinical trial. Eur J Clin Nutr 2003;57:514-22.

3. Bosello O, Cominancini L, Zocca I, et al. Short- and long-term effects of hypocaloric diets containing proteins of different sources on plasma lipids and apoproteins of obese subjects. Ann Nutr Metab 1988; 32:206-14.

4. Yamashita T, Sasahara T, Pomeroy SE, et al. Arterial compliance, blood pressure, plasma leptin, and plasma lipids in women are improved with weight reduction equally with a meat-based diet and a plant-based diet. Metabolism 1998;47:1308-14.

5. Jenkins DJ, Wolever TM, Spiller G, et al. Hypocholesterolemic effect of vegetable protein in a hypocaloric diet. Atherosclerosis 1989;78:99-107.

Menopause
Dose: Refer to label instructions

A double-blind study of 78 postmenopausal women (average age, 49.5 years) were randomly assigned to receive 60 mg per day of soy isoflavones (as aglycone) or placebo for six months.1 Then after a one-month break, each woman received the alternate treatment for an additional six months. Thinking (cognitive) performance and mood were assessed by tests at the end of each treatment period. Compared with placebo, people treated with isoflavones experienced significant improvement on 6 of 17 measures of cognitive function and 7 of 8 measures of mood. In another double-blind study, 177 postmenopausal women (average age, 55 years) who were experiencing five or more hot flushes per day were randomly assigned to receive soy isoflavones (50 mg per day total of an approximately equal mixture of isoflavones genistin and daidzin) or placebo for 12 weeks.2 The average reduction in hot flash frequency after 6 weeks was significantly greater in the isoflavone group than in the placebo group; however, during the entire 12 weeks, the difference between the two groups was only marginally significant.

References

1. Casini ML, Marelli G, Papaleo E, Ferrari A, D'Ambrosio F, Unfer V. Psychological assessment of the effects of treatment with phytoestrogens on postmenopausal women: a randomized, double-blind, crossover, placebo-controlled study. Fertil Steril 2006;85:972-8.

2. Upmalis DH, Lobo R, Bradley L, Warren M, Cone FL, Lamia CA. Vasomotor symptom relief by soy isoflavone extract tablets in postmenopausal women: a multicenter, double-blind, randomized, placebo-controlled study. Menopause 2000;7:236-42.

Premenstrual Syndrome
Dose: Refer to label instructions

In a double-blind trial, supplementing with soy protein (providing 68 mg of isoflavones per day) for two menstrual cycles was significantly more effective than a placebo at relieving premenstrual swelling and cramping.1 The placebo used in this study was cow's milk protein. Some doctors believe that cow's milk, because of its estrogen content, can worsen premenstrual symptoms. If that is the case, then the beneficial effect of soy protein may have been overestimated in this study.

References

1. Bryant M, Cassidy A, Hill C, et al. Effect of consumption of soy isoflavones on behavioural, somatic and affective symptoms in women with premenstrual syndrome. Br J Nutr 2005;93:731-9.

Athletic Performance and Exercise Recovery
Dose: 33 to 40 grams daily

In one preliminary study, elderly men participating in a 12-week strength training program took a liquid supplement containing 10 grams of protein (part of which was soy protein), 7 grams of carbohydrate, and 3 grams of fat either immediately following exercise or two hours later.1 Men taking the supplement immediately following exercise experienced significantly greater gains in muscle growth and lean body mass than those supplementing two hours later, but strength gains were no different between the two groups. A controlled study of female gymnasts found that adding 0.45 grams of soy protein (0.45 grams per pound of body weight per day) to a diet that was adequate in protein during a four-month training program did not improve lean body mass compared with a placebo.2 No research has compared different sources of protein to see whether one source, such as soy protein, has a better or more consistent effect on exercise recovery or the results of strength training.

References

1. Esmarck B, Andersen JL, Olsen S, et al. Timing of postexercise protein intake is important for muscle hypertrophy with resistance training in elderly humans. J Physiol 2001;535:301-11.

2. Stroescu V, Dragan J, Simionescu L, Stroescu OV. Hormonal and metabolic response in elite female gymnasts undergoing strenuous training and supplementation with SUPRO Brand Isolated Soy Protein. J Sports Med Phys Fitness 2001;41:89-94.

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.

Copyright 2014 Aisle7. All rights reserved. Aisle7.com

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. 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.

Label
To view the Label you will need Adobe Acrobat Reader installed. You can download a free copy of the Adobe Acrobat Reader at: http://www.adobe.com/acrobat/readstep.html
Ratings and Reviews

REVIEW SNAPSHOT®

by PowerReviews
GNC SuperFoods Soy Isoflavone Concentrate
 
5.0

(based on 4 reviews)

100%

of respondents would recommend this to a friend.

Pros

  • Effective (3)

Cons

    Best Uses

    • Daily use (3)

    Reviewed by 4 customers

    Sort by

    Displaying reviews 1-4

    Back to top

     
    5.0

    GNC Soy Isoflavone Concentrate

    By vanessa.stuff

    from Daytona Beach FL

    About Me Post menopause

    See all my reviews

    Pros

    • Effective
    • Works great

    Cons

      Best Uses

      • once a day

      Comments about GNC SuperFoods Soy Isoflavone Concentrate:

      I ran out of the soy I took before and I started having the mood swings because of my Post Menopause my Daughter pick up this one by the next day I was back to my old self but better, I never wanted to take the prescription hormones because of the side effect, I have taken soy for years and my Doctor said it's all natural so it was fine for me to take, Thanks GNC

      (0 of 2 customers found this review helpful)

       
      5.0

      Soy Isoflavone

      By liyj79

      from New York

      About Me First Time User

      See all my reviews

      Pros

      • Effective

      Cons

      • Side Effects

      Best Uses

      • Daily Use

      Comments about GNC SuperFoods Soy Isoflavone Concentrate:

      Good for women

      (1 of 3 customers found this review helpful)

       
      5.0

      I would buy this product again and again

      By 394129680

      from Jane Wang,China

      About Me Health Conscious

      See all my reviews

      Verified Buyer

      Pros

      • Effective

      Cons

      • Side Effects

      Best Uses

      • Daily Use

      Comments about GNC SuperFoods Soy Isoflavone Concentrate:

      It's very good!

      (0 of 5 customers found this review helpful)

       
      5.0

      I would buy this product again and again

      By 394129680

      from Jane Wang,China

      About Me Budget Buyer

      See all my reviews

      Pros

      • Easy To Use

      Cons

      • Complicated To Use

      Best Uses

      • Daily Use
      • Oily Skin
      • Women

      Comments about GNC SuperFoods Soy Isoflavone Concentrate:

      It's very good!

      • My Beauty Routine Takes:
      • 10 Minutes

      Displaying reviews 1-4

      Back to top

      Ask A Question