Hormone replacement therapy is one of the most-discussed and most-misunderstood areas of women's health. Terminology can be confusing — "bioidentical," "compounded," "natural," "synthetic," "BHRT" — and different sources use these words to mean different things. This page is an educational walk‑through. It explains what compounded hormone therapy is, how it differs from approved products, when prescribers consider it, and what the regulatory landscape in Canada actually looks like.

The Two Words That Get Confused

Most confusion comes from blurring two distinct concepts: "bioidentical" and "compounded".

Bioidentical refers to molecular structure. A hormone described as bioidentical has the same molecular structure as a hormone the body produces. Both Health Canada–approved commercial products and compounded preparations can contain bioidentical hormones. "Bioidentical" does not mean "safer" or "better" — it describes a molecular structure, not a quality judgment.

Compounded refers to how a medication is prepared. A compounding pharmacy prepares custom medication for an individual patient based on a specific prescription, rather than dispensing a mass‑manufactured product. Compounded preparations may or may not contain bioidentical hormones. The two concepts are independent.

How Hormone Therapy Generally Works

The body produces several hormones that influence many systems — reproductive function, mood, sleep, bone health, metabolism, skin, and cardiovascular function. As ovarian function declines during perimenopause and menopause, levels of certain hormones decline. For some women, this transition produces symptoms significant enough to consider treatment. Hormone therapy works by replacing some of the hormones the ovaries no longer produce in adequate amounts. The goal is not to restore levels to those of reproductive years, but to alleviate symptoms caused by hormone decline.

Health Canada–Approved Products vs. Compounded Preparations

Approved products go through Health Canada's drug approval process — including review of safety, efficacy, manufacturing quality, and stability. They are made in standardized doses and forms, subject to ongoing regulatory oversight, and typically covered by extended health plans.

Compounded preparations are prepared individually by a compounding pharmacy based on a specific prescription. They are made from pharmaceutical‑grade raw ingredients but are not Health Canada–approved drug products. Quality depends on the compounding pharmacy's standards — ingredient sourcing, equipment, validated procedures, and pharmacist oversight.

When Compounded Hormone Therapy Is Considered

Compounded preparations are considered when there's a specific clinical reason an approved product won't work. Common situations include:

• Documented sensitivities to inactive ingredients in approved products (specific dyes, preservatives, or other components)
• Doses not available commercially — for example, when a prescriber wants a strength that falls between commercial dose increments
• Combinations of multiple hormones in a single preparation, when clinically appropriate
• Specific vehicles or forms the patient can't use in approved products (e.g., a patient who cannot tolerate a particular adhesive in a transdermal patch)
• Continuity of a discontinued product when an approved product the patient was stable on is no longer commercially available

For patients without these specific situations, an approved product is typically the simpler starting point. The decision rests with the prescriber based on individual clinical assessment.

What Compounded Hormone Therapy Is Not

Some claims in marketing of compounded hormone preparations are not well‑supported:

• It is not categorically "safer" than approved products. Major medical organizations have generally not endorsed claims that compounded preparations are safer than approved hormone products.
• It is not "natural" in a meaningful sense distinct from approved products. Both compounded and many approved hormone products use hormones produced through pharmaceutical synthesis.
• It is not free of risks. The risks associated with hormone therapy generally — including thromboembolism, stroke, and hormone‑sensitive cancers — apply regardless of whether the hormone comes from a compounded preparation or an approved product.
• It is not a substitute for medical assessment. Hormone therapy decisions require clinical evaluation by a qualified prescriber.

Quality Standards in Compounding (Ontario)

For patients considering or using compounded hormone preparations, the quality of the compounding pharmacy matters. Standards a pharmacy should meet:

• Licensed by the Ontario College of Pharmacists in good standing
• Level C non-sterile compounding certification appropriate for the preparations being made
• Pharmaceutical‑grade ingredients from verified suppliers, with documented certificates of analysis
• Calibrated measurement equipment and validated written procedures
• Stability data and beyond‑use dating for each formulation
• Pharmacist verification at each step, detailed batch records retained for inspection

Humber Bay Compounding Pharmacy meets these standards as a Level C non‑sterile compounding pharmacy in Etobicoke, led by Nader Danyal, PharmD, RPh (OCP Lic. 604484).

Your Role and Next Steps

If you're starting to think about hormone therapy, read more before talking to your prescriber:

• A Practical Guide to Menopause and Perimenopause
• Forms of Compounded Hormone Therapy
• Safety and Research
• Getting Started
• Frequently Asked Questions

If you have specific pharmacy or formulation questions about a prescription you've already received, our pharmacist is available. For clinical decisions about whether hormone therapy is right for you, your prescriber is the appropriate starting point.