How Does Hormone Replacement Therapy Work? 4 Delivery Methods and What to Expect

Hormone replacement therapy restores declining hormone levels in women through supplementation of estradiol, progesterone, testosterone, and/or DHEA via 4 delivery methods: subcutaneous pellet therapy, injection, topical cream or gel, and oral progesterone.

The Mechanism: Restoring Hormonal Baseline

Hormone replacement therapy works by supplementing hormones that the body produces in declining quantities during perimenopause and menopause. Estradiol replacement binds estrogen receptors throughout the body: in bone cells (maintaining density), cardiovascular tissue (reducing inflammatory markers), the hypothalamus (reducing hot flash signaling), and vaginal tissue (restoring moisture and elasticity).

Progesterone binds progesterone receptors in the uterus (protecting the endometrial lining when estrogen is taken), the brain (supporting sleep and reducing anxiety), and other tissues. Testosterone binds androgen receptors in muscle (supporting protein synthesis), bone (maintaining density), and libido centers (supporting sexual interest and response).

The result of appropriately replaced hormones is not a pharmacological effect superimposed on normal physiology. It is a restoration of the hormonal milieu to the range where the body functions as designed.

The 4 Delivery Methods at Rebuild Regen

Pellet therapy: Subcutaneous pellets inserted in the hip or buttock release consistent bioidentical hormone levels over 3 to 5 months. No daily compliance required. No peak-trough fluctuations. Elizabeth Celestin performs pellet insertion in-office under local anesthetic.

Injection: Intramuscular or subcutaneous hormone injections administered weekly or biweekly. Self-injection training is available. Injection produces a higher peak after administration and a lower trough before the next dose.

Topical (cream or gel): Applied daily to skin surfaces. Provides absorption through the dermis into circulation. Allows dose flexibility. Requires consistent daily application and awareness of transference risk with testosterone formulations.

Oral progesterone: Taken at bedtime. Natural bioidentical progesterone has a mild sedative effect that complements its hormonal role. Used to protect the endometrial lining in women on estrogen with an intact uterus.

What to Expect From HRT at Rebuild Regen

Hormone replacement therapy at Rebuild Regen Medical Clinic at 3320 N Federal Hwy #101, Lighthouse Point, FL starts with labs before any prescription is written. A 4 to 6 week follow-up panel confirms levels are in the therapeutic range. Symptom assessment guides dose refinement. See the complete HRT guide for the full timeline.

When HRT Is Not Appropriate

HRT is contraindicated in estrogen receptor-positive cancer, active blood clots, unexplained vaginal bleeding, and active liver disease. Individual risk assessment during the consultation determines whether HRT is appropriate for each patient.