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Estradiol

Ingredient · In our Bi-Est Cream, Bi-Est + Progesterone Cream, Estradiol Tablet and Estradiol Vaginal Cream

Estradiol (17β-estradiol)

Estradiol is the main estrogen your ovaries made for most of your adult life. When those levels drop and swing in perimenopause and menopause, it can show up as hot flashes, night sweats, vaginal dryness and bone loss. Estradiol is one of the most studied treatments in all of women's health for exactly those symptoms.1,2,4

Abstract flowing glass ribbon, illustrative ingredient artwork
Estradiol

Photos are illustrations, not the medicine. The estradiol in these medicines is made in a lab, and it's chemically identical to the estradiol your body makes.7

FDA-approved ingredient

Estradiol is FDA-approved to treat moderate to severe hot flashes and night sweats, moderate to severe vaginal dryness and related symptoms of menopause, and to help prevent bone loss in women at significant risk.1 Our versions are compounded by a licensed pharmacy for you, and compounded medicines are not FDA-approved themselves. The FDA approval applies to the ingredient, not to our specific formulas.5,6

FDA-approved for this useWell studied, used off-labelEarly evidenceLittle or no human data

The studies below used FDA-approved products or other forms. Our compounded version hasn't been studied in trials, and results may differ.

What it is

Estradiol is a hormone. Before midlife, your ovaries made most of it, and it helped regulate your cycle, your body temperature, the tissue of your vagina and bladder, and how fast you lose bone.

In perimenopause your estradiol levels start swinging, and after menopause they fall and stay low. That drop is behind many of the symptoms women recognize first: the 3 a.m. sweats, the hot flash in the middle of a meeting, sex that suddenly hurts.

Why it's in these products

Replacing some of the estradiol your body stopped making is the most direct way to treat the symptoms caused by losing it. The Menopause Society calls hormone therapy the most effective treatment for hot flashes and for vaginal and urinary symptoms of menopause, and it has also been shown to prevent bone loss and fracture.4

We offer it in different forms because different symptoms call for different approaches. A tablet or a skin cream goes through your whole body and is aimed at hot flashes and night sweats. A vaginal cream uses a small amount where it's needed, aimed at dryness, discomfort and urinary symptoms.1,3,8

Bi-Est CreamBi-Est + Progesterone CreamEstradiol TabletEstradiol Vaginal Cream

What the studies in people show

  • Cochrane reviewHot flashes: about 75% fewer than placeboA Cochrane review pooled 24 randomized trials of oral hormone therapy (estrogen alone or with a progestogen). Women taking hormones had about 75% fewer hot flashes per week than women taking a placebo, and their hot flashes were less severe. Women on placebo improved too, by about 58%, which is a good reminder of why placebo-controlled trials matter.2
  • Cochrane reviewVaginal dryness: vaginal estrogen helpsA Cochrane review of 30 randomized trials (6,235 women) found that vaginal estrogen creams, tablets and rings improved symptoms of vaginal atrophy compared with placebo, with no clear difference between the forms. The authors rated the evidence low quality, mainly because the trials were small or poorly reported.3
  • Expert guidelineTiming mattersThe Menopause Society's 2022 position statement says that for women under 60, or within 10 years of their last period, without reasons to avoid it, the benefits of hormone therapy outweigh the risks for bothersome hot flashes and for preventing bone loss. Starting later than that, the balance looks less favorable because the absolute risks of heart disease, stroke, blood clots and dementia are higher.4
  • Expert guidelineVaginal estrogen is its own categoryThe Menopause Society's 2020 statement on genitourinary syndrome of menopause says low-dose vaginal estrogen is an effective treatment and, used this way, doesn't need a progestogen. It also notes that safety for the uterine lining hasn't been studied in trials beyond one year.8

What we don't know yet

Almost all of this evidence comes from FDA-approved estradiol products, not compounded ones. A 2020 report from the National Academies of Sciences, Engineering, and Medicine found too little evidence to show that compounded bioidentical hormones are as safe and effective as FDA-approved versions, and raised particular questions about how consistently compounded creams are absorbed.5

That doesn't mean compounded estradiol doesn't work. It means the large trials above weren't done on compounded formulas, and you deserve to know that. It's one reason your clinician checks in on how you're doing rather than assuming.

Safety, in plain English

Estradiol is a real medicine with real risks, and the FDA requires a boxed warning on estrogen products. Taking estrogen without a progestogen raises the risk of cancer of the uterine lining, so women who still have a uterus are generally prescribed a progestogen too (one reason Bi-Est + Progesterone Cream exists). The label also describes higher risks of stroke, blood clots, heart attack, breast cancer and probable dementia seen in large trials of older postmenopausal women.1

Your age, how long it's been since your last period, your personal and family history and the form you use all change the picture.4 A licensed clinician reviews all of that before deciding whether estradiol is appropriate for you, and exploring it here never means you'll get a prescription.

Curious if estradiol is right for you?

Start with a free assessment. A licensed clinician reviews your health history and decides whether treatment is appropriate. No pressure, and no prescription unless it makes sense for you.

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Sources

  1. U.S. National Library of Medicine, DailyMed. Estradiol tablets, USP: prescribing information (indications and boxed warning). DailyMed
  2. MacLennan AH, Broadbent JL, Lester S, Moore V. Oral oestrogen and combined oestrogen/progestogen therapy versus placebo for hot flushes. Cochrane Database Syst Rev. 2004;(4):CD002978. PubMed 15495039
  3. Lethaby A, Ayeleke RO, Roberts H. Local oestrogen for vaginal atrophy in postmenopausal women. Cochrane Database Syst Rev. 2016;(8):CD001500. PubMed 27577677
  4. The 2022 Hormone Therapy Position Statement of The North American Menopause Society (now The Menopause Society). Menopause. 2022;29(7):767-794. PubMed 35797481
  5. National Academies of Sciences, Engineering, and Medicine. The Clinical Utility of Compounded Bioidentical Hormone Therapy: A Review of Safety, Effectiveness, and Use. Washington, DC: National Academies Press; 2020. NCBI Bookshelf · PubMed 33048485
  6. U.S. Food and Drug Administration. Compounding and the FDA: Questions and Answers. FDA
  7. PubChem, National Center for Biotechnology Information. Estradiol (CID 5757): Methods of Manufacturing. PubChem
  8. The 2020 genitourinary syndrome of menopause position statement of The North American Menopause Society. Menopause. 2020;27(9):976-992. PubMed 32852449

Sources checked November 8, 2026. This page is general education, not medical advice, and it doesn't mean any treatment is right for you. Photos: Unsplash (Justin Owens, Terry Vlisidis, Chris Barbalis, Pradeep Raj).