Hormone therapy is a key treatment for individuals managing menopause, andropause, PCOS, thyroid dysfunction, and gender-affirming care. While hormone levels and dosages often take center stage, the delivery base used in compounded medications plays a critical role in treatment outcomes. The base determines how the hormone is absorbed, tolerated, and used by the body. Selecting the right one can improve symptom relief, reduce side effects, and increase patient compliance.
A hormone therapy base is the medium that carries the active hormone ingredient—such as estradiol, progesterone, or testosterone—into the body. In compounded formulations, it affects bioavailability, tissue penetration, and overall efficacy. The ideal base supports hormone stability, minimizes irritation, and ensures proper dosing with each use.
Types of Hormone Therapy Bases
Topical Creams and Gels
Common bases: Lipoderm®, Versabase®, HRT Base Cream, PLO Gel
Used for: Estradiol, progesterone, testosterone, DHEA
Topical delivery bypasses liver metabolism, offering effective absorption with fewer systemic side effects. Lipoderm® and HRT Base Cream are commonly used for their cosmetic appeal and enhanced absorption. PLO gel is effective but may feel greasy or separate over time. These are ideal for patients with GI sensitivities or those requiring consistent hormone levels.
Oral Capsules
Common fillers: Microcrystalline cellulose (Avicel®), methylcellulose, acidophilus, rice flour
Used for: Progesterone, DHEA, thyroid hormones
Oral capsules are familiar and convenient, especially for nighttime progesterone dosing. They offer excellent customization for microgram-level precision. However, some patients may react to certain fillers or experience reduced bioavailability due to first-pass liver metabolism, especially with estrogen.
Sublingual Troches and Lozenges
Common bases: Polyethylene glycol (PEG), xylitol blends, gelatin
Used for: Progesterone, testosterone, estrogen, pregnenolone
Troches dissolve under the tongue or between the cheek and gum, allowing rapid absorption through the mucosa. This method bypasses liver metabolism and delivers hormones directly into the bloodstream. They’re useful for patients who require quick onset or who cannot tolerate topicals or capsules. Proper administration technique is essential for effectiveness.
Vaginal Creams and Suppositories
Common bases: Versabase® Vaginal Cream, PEG or fat-based suppositories
Used for: Estriol, estradiol, progesterone, DHEA
These are ideal for local treatment of dryness, thinning, or irritation in perimenopausal or postmenopausal patients. Vaginal delivery minimizes systemic absorption when desired and targets hormone activity directly to affected tissue. Clean, hypoallergenic bases improve comfort and reduce risk of irritation.
Why the Base Matters in Hormone Therapy
The base directly influences how a hormone functions in the body. It affects the rate of absorption, distribution to target tissues, and how well the body tolerates the therapy. A patient who reacts poorly to one base may thrive on another—without needing to adjust the hormone dose itself.
Hormone bioavailability can vary significantly based on the delivery system, which is why prescribers and compounders must collaborate closely to select the right formulation. Choosing the right base enhances consistency, reduces adverse reactions, and improves long-term adherence.
Factors to Consider When Selecting a Base
Route of Administration
Certain routes, like vaginal or sublingual, may be better suited to specific symptoms or absorption challenges. For example, testosterone is better absorbed transdermally than orally.
Patient Sensitivities
Patients with allergies, gut inflammation, or autoimmune conditions may require dye-free, gluten-free, or filler-free formulations. Using a clean base minimizes the risk of adverse reactions and enhances treatment tolerability.
Hormone Stability and Dose Requirements
Certain hormones require specific bases to remain stable and effective. Some bases allow for higher concentrations or improved penetration, while others are better suited for lower, maintenance-level dosing.
Lifestyle and Compliance
Ease of use is critical for adherence. A base that feels greasy, melts in storage, or has an unpleasant texture may cause patients to abandon treatment. Selecting a base that fits into the patient’s daily routine increases the likelihood of successful outcomes.
Custom Compounding for Individualized Care
No two patients are the same—and neither are their hormone needs. That’s why personalized compounding is essential. By customizing not just the hormone dose but the base as well, prescribers and pharmacists can create therapies that align with the patient’s physiology, preferences, and long-term goals.
At Ion Integrative Pharmacy, we specialize in compounded hormone therapy with a focus on clean ingredients and patient-specific customization. Our pharmacists collaborate with providers to choose the ideal base and delivery format for each individual, ensuring optimal absorption, safety, and results. From Lipoderm® topicals to sublingual troches and beyond, every formulation is made with care in our USP 795 and 800-compliant facility.
The success of hormone therapy depends on more than just hormone levels—it relies on thoughtful formulation from the ground up. The base is not a minor detail; it’s a key factor in how well the treatment works. By understanding the impact of delivery systems and selecting the most appropriate base, providers and patients can experience more effective, well-tolerated hormone therapies with better outcomes.
