What Is Bioidentical Hormone Therapy and How Does It Work?

For Her

Jun 4

The term “bioidentical hormone therapy” appears frequently in conversations about menopause, hormone replacement therapy, and healthy aging.

But what does “bioidentical” actually mean?

The term is often used in marketing in ways that can create confusion—particularly around the differences between FDA-approved hormone medications and compounded hormone preparations.

At OTR Health & Wellness, we believe patients considering hormone therapy should understand those differences before making treatment decisions.

What Does “Bioidentical” Mean?

A bioidentical hormone is generally understood to be a hormone that is chemically identical to a hormone produced by the human body.

Examples can include forms of estrogen, progesterone, and testosterone.

One important point is often overlooked:

Bioidentical does not mean the same thing as compounded.

FDA-approved medications can contain bioidentical hormones.

Compounded preparations may also contain bioidentical hormones.

The term “bioidentical” describes characteristics of the hormone itself. It does not tell you whether a particular medication has been approved by the FDA.

Are Bioidentical Hormones “Natural”?

The word “natural” is frequently used when discussing bioidentical hormones, but it can be misleading.

Hormone medications require pharmaceutical manufacturing or preparation regardless of whether the hormone is chemically identical to one produced by the body.

Calling a medication “natural” can also create the impression that it is automatically safer, gentler, or free from risk.

That isn't an appropriate assumption.

Hormone therapy can have potential benefits and potential risks regardless of whether a particular hormone is described as bioidentical.

Patients should evaluate the specific medication and treatment plan rather than assuming that “natural” means safer.

FDA-Approved vs. Compounded Hormone Therapy

This is an important distinction for patients to understand.

FDA-Approved Hormone Medications

FDA-approved medications have been reviewed by the U.S. Food and Drug Administration for specific uses, formulations, manufacturing standards, labeling, safety, and effectiveness based on the information submitted for approval.

Several FDA-approved hormone medications contain hormones that may be described as bioidentical.

Compounded Hormone Medications

Compounded medications are prepared for individual patients under applicable compounding requirements.

A healthcare professional may prescribe a patient-specific compounded hormone preparation in certain circumstances when clinically appropriate and permitted by applicable law.

However:

Compounded medications are not FDA-approved.

The FDA does not review compounded medications for safety, effectiveness, or quality before they are marketed.

A compounded hormone preparation should therefore not be described as an FDA-approved generic medication or assumed to have the same evidence, manufacturing controls, or regulatory status as an FDA-approved product.

Are Compounded Bioidentical Hormones Safer?

The word “bioidentical” should not be interpreted as proof that a compounded hormone medication is safer than an FDA-approved hormone medication.

Likewise, the fact that a compounded medication can be individualized does not establish that it will produce better outcomes.

Hormone therapy has potential risks and benefits that depend on factors such as:

The hormone being used
Dose
Route of administration
Duration of treatment
Patient age
Medical history
Treatment indication
Other medications
Individual risk factors

Your healthcare professional can help you understand which considerations are relevant to your individual treatment.

Why Might Hormone Therapy Be Considered?

Hormone therapy may be considered for appropriately selected patients based on their symptoms, diagnosis, health history, stage of life, potential risks and benefits, and other clinical factors.

For women, menopausal hormone therapy may be considered for certain symptoms associated with menopause.

For men, testosterone therapy may be considered when an appropriate evaluation supports a diagnosis of testosterone deficiency and treatment is clinically appropriate.

Hormone therapy should not be viewed as a general treatment for aging or as a way to “optimize” every patient's hormone levels.

What Symptoms Mean I Need Hormone Therapy?

There isn't a checklist of common symptoms that automatically means someone needs hormone treatment.

Symptoms such as:

Fatigue
Changes in sleep
Changes in mood
Difficulty concentrating
Changes in weight
Changes in sexual function
Reduced motivation

can have many potential causes.

Hormonal changes may sometimes be relevant, but symptoms alone do not establish a hormone deficiency or prove that hormone therapy will help.

An appropriate clinical evaluation matters.

Do I Need Hormone Testing?

Laboratory testing may be used when clinically appropriate, but the role of testing depends on the patient and the reason hormone therapy is being considered.

For example, evaluation of possible testosterone deficiency generally involves appropriate clinical assessment and laboratory testing.

Evaluation of symptoms associated with perimenopause and menopause may involve a different clinical approach because hormone levels can fluctuate during the menopausal transition.

Laboratory results should be interpreted alongside symptoms, medical history, medications, physical findings when appropriate, and other relevant clinical information.

Treatment should not simply be aimed at achieving a predetermined “optimal” hormone number.

Is Hormone Therapy Customized?

Hormone therapy should be individualized, but that does not necessarily mean the medication must be compounded.

Individualization can involve decisions about:

Whether treatment is appropriate
Which hormone or medication is used
Dose
Route of administration
Treatment goals
Monitoring
Duration of treatment
Changes to therapy over time

Some patients may be appropriately treated with an FDA-approved hormone medication.

In certain circumstances, a healthcare professional may determine that a patient-specific compounded preparation should be considered.

The appropriate approach depends on the individual patient.

What Are the Potential Benefits?

Potential benefits depend on why hormone therapy is being prescribed and which treatment is being used.

For appropriately selected women, menopausal hormone therapy may help certain symptoms associated with menopause.

For appropriately diagnosed men with testosterone deficiency, testosterone therapy may improve certain symptoms associated with that deficiency.

The presence of a symptom does not guarantee that hormone therapy will improve it.

Individual responses vary.

What Are the Risks?

Hormone therapy is not risk-free.

Potential risks and contraindications depend on the specific medication, patient, dose, route of administration, treatment duration, health history, and other factors.

Patients considering hormone therapy should discuss potential risks, benefits, alternatives, and appropriate monitoring with their healthcare professional.

Certain patients may require additional evaluation before treatment, and hormone therapy may not be appropriate for some individuals.

Does Hormone Therapy Reverse Aging?

No.

Hormone therapy should not be represented as a way to reverse or stop aging.

It also should not be expected to guarantee:

Weight loss
Increased confidence
Improved athletic performance
Increased muscle mass
Improved mental health
Better sleep
Improved sexual performance
Younger-looking skin
Prevention of chronic disease
Restoration of “youthful vitality”

Reasonable treatment goals depend on the patient's diagnosis, symptoms, treatment, and individual clinical circumstances.

What Should I Ask Before Starting Hormone Therapy?

If you're considering hormone treatment, useful questions for your healthcare professional may include:

Why is hormone therapy being considered for me?
What symptoms or condition are we treating?
What treatment options are available?
Is the medication FDA-approved or compounded?
Why is this particular formulation being recommended?
What are the potential benefits?
What are the important risks and contraindications?
What alternatives should I consider?
What monitoring will I need?
How will we determine whether treatment is helping?
Under what circumstances would treatment be adjusted or discontinued?

Patients should feel comfortable understanding what they are being prescribed and why.

An Individualized Approach at OTR Health & Wellness

At OTR Health & Wellness, hormone treatment begins with an appropriate clinical evaluation.

Depending on the patient, that evaluation may include discussion of symptoms, health history, medications, treatment goals, risk factors, and laboratory testing when appropriate.

If hormone therapy is considered appropriate, your healthcare professional can discuss available treatment options and the potential benefits, risks, limitations, alternatives, and monitoring associated with them.

Requesting bioidentical hormone therapy, completing laboratory testing, scheduling a consultation, or enrolling in a program does not guarantee that hormone treatment will be prescribed.

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Important Hormone Therapy Information

This article is provided for general educational purposes and is not a substitute for individualized medical advice, diagnosis, or treatment.
“Bioidentical” does not mean that a medication is FDA-approved, compounded, natural, safer, or more effective.
FDA-approved medications may contain bioidentical hormones. Compounded preparations may also contain bioidentical hormones.
Compounded medications are not FDA-approved and have not been reviewed by the FDA for safety, effectiveness, or quality.
Hormone therapy carries potential risks and is not appropriate for every patient. Treatment should be provided only following an appropriate clinical evaluation by a licensed healthcare professional.
Individual results vary. No particular improvement in energy, mood, sleep, sexual function, cognition, body composition, appearance, physical performance, or other outcome is guaranteed.
If you are experiencing a medical emergency, call 911 or seek immediate emergency medical attention.