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The following doses are backed by clinical research studies:
- For postmenopausal women: A supplement with least 54 mg of genistein (a soy isoflavone) per day is suggested for hot flashes.
- For IBS: A supplement of 40 mg of isoflavones per day for six weeks
- For protection against osteoporosis: A supplement of 80 mg per day of soy isoflavones was associated with a dosage that reduced bone loss in postmenopausal women (protecting against osteoporosis).
- For general supplementation: Drugs.com< suggests using a daily dose of 40 to 120 mg of isoflavones per day (from soy) or 40 to 80 mg per day of isoflavones (from red clover) for various conditions.
Note, the safety of the use of isoflavones, taken as a supplement, cannot be guaranteed when taken for a duration of longer than six months. *
