Comparison · hormone optimization

BHRT vs Synthetic HRT

BHRT uses hormones (estradiol, progesterone, testosterone) that are molecularly identical to those produced endogenously. Conventional synthetic HRT historically used conjugated equine estrogens and synthetic progestins (e.g., medroxyprogesterone). The molecular distinction matters for metabolism, receptor profile, and the evidence base on cardiovascular and breast outcomes.

Reviewed by Dr. Laura PurdyMay 29, 2026

Attribute

BHRT (Bioidentical hormone optimization)

Conventional synthetic HRT

Molecular structure

Identical to endogenous hormones

Synthetic analogs (conjugated equine estrogens, medroxyprogesterone)

Estrogen used

Estradiol (transdermal preferred)

Conjugated equine estrogens (oral)

Progestogen used

Micronized progesterone

Synthetic progestins

Delivery

Transdermal, oral, injectable, topical

Predominantly oral

Cardiovascular profile

Transdermal estradiol bypasses first-pass hepatic effect

Oral conjugated estrogens carry higher thromboembolic signal

Breast-tissue evidence

Micronized progesterone has a more favorable breast signal than synthetic progestins

Synthetic progestin signal drove much of the original WHI risk read

Biomarker panel

Hormones, Lipids, CBC, CMP — required

Standard hormone monitoring

Choose BHRT (Bioidentical hormone optimization)

BHRT is the provider-reviewed pathway when the goal is hormone replacement using molecules identical to endogenous production, with delivery (transdermal estradiol, micronized progesterone) matched to candidacy and the standardized panel.

Explore pathway

Choose Conventional synthetic HRT

Conventional synthetic HRT remains in use in specific clinical contexts but is not the modern default for most BHRT candidates.

Educational. Final pathway selection is provider-reviewed via synchronous video consultation against your biomarkers, history, and goals.

Frequently asked

Did the WHI study apply to BHRT?

The original WHI used conjugated equine estrogens plus medroxyprogesterone — not bioidentical estradiol and micronized progesterone. The risk profile of those specific molecules does not generalize cleanly to BHRT.

Is 'bioidentical' the same as 'compounded'?

No. Bioidentical refers to molecular structure. Compounded refers to pharmacy preparation. BHRT can use FDA-approved bioidentical products or compounded preparations — the distinction is reviewed in candidacy.

Next step

Take the optimization assessment.

The adaptive assessment maps your symptoms, history, and goals to candidate pathways — and routes you into provider review.

Begin assessment