Frequently Asked Questions
Q. What is IsoRel?
IsoRel is a soy isoflavone supplement formulated to help reduce the frequency and severity of menopausal hot flashes.* IsoRel is produced from Novasoy®
, a whole soybean extract, which means that each capsule provides the naturally occurring soy isoflavones (genistin, daidzin, and glycitin) in the same isoflavone ratio as found in soybeans.
Q. How is IsoRel different from other supplements for hot flash relief?
IsoRel is produced from 100% Novasoy, a whole soybean extract, which means that each capsule provides the naturally occurring soy isoflavones (genistin, daidzin, and glycitin) in the same isoflavone ratio as found in soybeans. IsoRel provides 100 mg of soy isoflavones in only one small capsule per day.
IsoRel is independently tested and certified by NSF International, a not-for-profit organization that is the world leader in standards development and product certification for public health and safety. NSF has implemented the highest quality control standards in the supplements industry. The NSF mark is your assurance of a dietary supplement's content accuracy, purity, and freedom from contaminants.
Most other products have not been certified by NSF.
Q. What is the recommended dosage of IsoRel?
The recommended dosage of IsoRel is one small capsule per day, which contains 100 mg of soy isoflavones. The amount of soy isoflavones found in IsoRel is equivalent to approximately 4 cups of soy milk or 2 cups of tofu.
For more information about the recommended dosage, please speak to your healthcare provider or contact our Nutrition Department via email
or by calling toll-free (888)899-3899, ext. 4.
Q. Why doesn't IsoRel contain black cohosh or other nutrients for menopausal hot flashes?
Unlike many other products marketed for relief of hot flashes, IsoRel does not add other vitamins, minerals, or herbal ingredients that have not been well studied or shown to be effective. If you are looking for a natural solution for hot flashes, there is no reason to pay extra for ingredients such as black cohosh, St. John's Wort, cranberry, B vitamins, or various herbal blends that have not been shown to be effective in clinical trials.
Black cohosh may not be safe and is not recommended. Several reports have linked black cohosh to liver damage (liver failure or autoimmune hepatitis). Although a few studies have shown that black cohosh may improve menopausal symptoms, most well-controlled studies have shown no consistent benefit. A recent study found that after six months, women taking black cohosh actually had more severe hot flashes than women taking placebo.
Q. Can IsoRel be taken along with other nutritional supplements?
Yes, IsoRel can be taken along with most other nutritional supplements. If you have questions about taking IsoRel with other supplements, please call toll-free (888)899-3899, x4 or email
our Nutrition Department.
Q. Does Isorel interact with prescription medications?
Please refer to the medication interactions
information page to check whether your medication may interact with the nutrients in this product.
Q. What should I expect when taking IsoRel?
Research studies indicates that it may take up to three months of consistent use to see the benefits of the soy isoflavones found in IsoRel. For more information, please speak to your physician or call toll-free (888)899-3899, x4 or email
our Nutrition Department.
Q. Does IsoRel have side effects?
Soy isoflavones are generally well tolerated. There are no expected side effects from IsoRel. A small percentage of women may experience gastrointestinal upset (constipation, diarrhea, bloating, or nausea). IsoRel should be taken with food to minimize the risk of any gastrointestinal complaints.
Q. Is there anyone who should not take IsoRel?
IsoRel contains soy isoflavones, therefore, if you are allergic or sensitive to soy you should not take IsoRel.
Q. I have trouble swallowing pills. Will I be able to take IsoRel?
IsoRel capsules are relatively small in comparison to many other dietary supplements. If you are not sure whether you will be able to swallow IsoRel, and your doctor's office did not give you a sample, please call us at (888)899-3899 ext 4.
If after trying a sample you find that you cannot swallow IsoRel, try opening the capsules and sprinkling the soy isoflavone powder onto pudding, yogurt, applesauce, or other food.
Q. Is IsoRel safe for women who have had breast cancer?
The effects of soy isoflavones on women with a history of breast cancer are unclear. Studies show that girls who eat soy foods during childhood and adolescence are less likely to be diagnosed with breast cancer later in life. Large studies of Chinese women who have been treated for breast cancer have shown that those who eat more soy foods have a lower risk of breast cancer recurrence and death from the disease than those who consume low amounts of soy. A recently published study of U.S. and Chinese women showed similar results. Another small U.S. study showed that women with breast cancer who took a 200 mg soy isoflavone extract for two weeks prior to surgery did not have any change in breast cancer cell growth, showing that this high dose of soy isoflavones did not affect their breast cancer. However, until more is known, women with a history of breast cancer should not take a soy isoflavone supplement such as IsoRel, but may benefit from eating soy foods regularly.
Q. What type of gelatin is used to make the IsoRel capsules?
The IsoRel gelatin capsules are made from kosher, certified BSE-free (bovine spongiform encephalopathy) bovine gelatin. In other words, the source of the gelatin used is certified to contain no mad cow disease.
Q. Is this product gluten-free and artificial dye-free?
Yes, all Theralogix products are gluten-free and contain no artificial dyes. Each Theralogix product is tested by NSF International®
for content accuracy, purity, and freedom from contaminants. During this testing process, each product is also tested to confirm that there is no gluten present.
Q. What does the date printed on my Theralogix product mean?
A. Theralogix products list an EXP (expiration) date. To ensure best potency, keep your nutritional supplements in a cool dry place, away from heat and moisture and use before this date.
If you have any questions about the shelf life of your product, feel free to contact our Nutrition Department by email or call us toll-free at (888)899-3899 ext. 4.
* This statement has not been evaluated by the Food and Drug Administration.
This product is not intended to diagnose, treat, cure or prevent any disease.