Skip to content

The effect of isoflavones in endometriotic pain

The inhibitory effect of dietary supplements (aglycone isoflavones) in endometriotic pain

Status
Recruiting
Phases
Phase 3
Study type
Interventional
Source
JPRN
Registry ID
JPRN-jRCTs051200074
Enrollment
110
Registered
2020-10-27
Start date
2020-10-27
Completion date
Unknown
Last updated
2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

endometriosis

Interventions

Active group: Aglycone isoflavone supplements 2 tablets a day (30 mg / day in terms of aglycone isoflavones) for 4 months Placebo group: Take placebo 2 tablets a day for 4 months

Sponsors

Taisuke Mori
Lead Sponsor

Eligibility

Sex/Gender
Female

Inclusion criteria

Inclusion criteria: In patients diagnosed with endometriosis, (1) Patients younger than 45 years of age who are 20 years old or older (2) Patients with chronic pelvic pain with a menstrual cycle period of 25 to 38 days and VAS 2.0 or higher

Exclusion criteria

Exclusion criteria: (1) Patients who used dietary supplements containing soy isoflavones within 3 months of their visit (2) Within 3 months from the visit, GnRH analog preparation, endocrine preparation mainly composed of luteinizing hormone or follicular hormone, low-dose pill, medium-dose pill, testosterone derivative and Chinese medicine with indication for endometriosis were used patient (3) Patients who have undergone surgical treatment for endometriosis with transvaginal alcohol fixation, laparotomy, and laparoscope within 3 months after consultation (4) Patients who are pregnant or suspected of being pregnant at the time of consultation (5) Patients who are lactating women at the time of consultation (6) Patients judged by the attending physician as inappropriate

Design outcomes

Primary

MeasureTime frame
Pain improvement effect before and after administration of aglycone isoflavone. Evaluate menstrual pain, nonmenstrual chronic pelvic pain, sexual intercourse pain, urination and defecation pain by VAS at outpatient visit.

Secondary

MeasureTime frame
Changes in the size of endometriotic cysts before and after administration of aglycone isoflavones are measured with transvaginal ultrasound. Evaluation of liver function by normal blood sampling. Inquire about the presence or absence of side effects at the visit and continue to confirm safety.

Contacts

Public ContactTakaoka Osamu

University Hospital Kyoto prefectural university of medisine

takaoka@koto.kpu-m.ac.jp+81-75-251-5560

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026