What Are Compounded Bioidentical Hormones Anyway?

Updated March 2026

Hormonal problems like fatigue, low sex drive, and weight gain are really common. But many people are afraid to seek help for fear of being met with an extreme response — either a total dismissal of their symptoms, or the opposite — an ‘overkill’ approach in which they are given a drug that causes more problems than it solves. 

When it comes to hormone imbalances, the conventional approach is either to treat symptoms with medications that don’t address the underlying hormonal imbalance, or to prescribe synthetic hormones, which can come with a range of side effects. 

Most conventional medications are simply too heavy-handed, and that’s why a growing number of people in the UK are turning to custom-compounded bioidentical hormone therapy to balance their hormones more naturally.

What are bioidentical hormones?

Bioidentical hormones are derived from plant sources and designed to be identical in structure to the hormones produced naturally by the human body. 

It’s different from synthetic hormone-like drugs found in contraceptives or many standard HRT preparations. Synthetic hormone-like drugs are not identical in structure to the hormones the body produces, which means the body may not metabolise them in the same way.

Key Differences: Bioidentical vs Synthetic Hormones

• Bioidentical hormones match your body’s natural hormones 

• Synthetic hormones have a different chemical structure

• Bioidentical hormones are often better tolerated 

Synthetic options may cause more side effects for some patients

What are compounded bioidentical hormones?

Bioidentical hormones can be compounded, meaning they are formulated into a custom dose tailored to your needs by a specialist pharmacy. 

Unlike standardised medications, custom-compounded bioidentical hormones can be created in personalised dosages. This makes them a suitable option for people who may have had negative experiences with conventional hormone medications in the past. 

It also means that your prescription can evolve over time e — as you natural hormone levels change, your treatment can be adjusted accordingly.  Why Patients Choose Compounded Hormones 

• Personalised dosing based on individual needs 

• Flexible treatment that adapts over time 

• Alternative for those sensitive to synthetic HRT

A range of administration methods (creams, capsules, etc)

How do compounded hormones work? 

You’re an expert in your own body. You know what you’re feeling and how you are responding to treatment. Having the ability to fine-tune your hormone dosage based on your symptoms is a key factor in effective hormone balancing. This level of personalisation often requires more attention than standardised, mass produced medications can provide. 

However, some patients are hesitant to use compounded hormone medications due to perceived risk. Custom-compounded hormones are unlicensed, because licensing requires a single dose for a single condition, which doesn’t align with personalised medicine. 

For those who decide to go the compounded route, it is essential to use a reputable UK-based pharmacy regulated by the General Pharmaceutical Council, like Hormones and You.

What is compounding medicine?

Historically, compounding was the standard way prescriptions were prepared. Pharmacists would create medications from individual ingredients tailored to the patient. Most prescriptions were filled by compounding ingredients at a compounding pharmacy. 

Mass production of prescription drugs began in the 19th century, leading to the modern pharmaceutical industry. However, compounding pharmacies still play a critical role today, especially in personalised medicine. 

What Do Compounding Pharmacies Do?

Compounding pharmacies are essential in specialities that require customised treatments,, such as dermatology, paediatrics, and hormone health. Because hormone balancing is individual to your body, standardised hormone therapies may not work for everyone. 

Benefits of Compounding Pharmacies 

• Create personalised hormone dosages 

• Offer alternative delivery methods 

• Adjust treatments for different life stages 

• Provide options when standard medicines are unsuitable 

For example, a progesterone dose designed for menopause may not suit a younger woman experiencing PMS, highlighting the need for individualised hormone therapy.

Are Synthetic Hormones Effective for Hormonal Imbalance? 

Many mass-produced hormone therapies that are available still contain synthetic hormones. These may not always address the root cause of a hormonal imbalance and can sometimes worsen symptoms.. For example, contraceptive pills are often prescribed for hormonal issues, but they typically manage symptoms rather than correct the underlying imbalance. Many bioidentical hormone treatments in the UK are only available through compounding pharmacies, making them a key option for personalised care. 

For more information about synthetic hormones, please read our article ‘Bioidentical Vs Synthetic’.

Bioidentical Hormone Therapy: Is it Right for You? 

Bioidentical hormone balancing treatment can be easy and life-changing when tailored correctly. When precise dosages and flexible administration methods matter, custom-compounded bioidentical hormones offer a personalised solution that standard treatments may not provide.

Looking for Personalised Hormone Treatment in the UK?

If you suspect you are suffering from a hormonal imbalance and are looking for customised, high-quality treatment, then take our online medical questionnaire now.