What Are Hormone Biomarkers and What Can They Tell Us About Your Health?

Hormones affect far more than most people realise. They influence energy, mood, sleep, weight, muscle strength, libido, fertility, menstrual cycles, metabolism and how well we generally feel day to day. When hormones change, the symptoms are not always dramatic. Sometimes you just feel tired, flat, less motivated, struggle with your weight, notice changes in libido, or simply feel that something is not quite right.

This is where hormone biomarkers can be useful.

A hormone biomarker is simply something we can measure in the blood to give us more information about how your hormone system is functioning.

The important thing is not just looking at one number on its own.

I am often more interested in how the hormones relate to each other.

Why I Look at More Than One Hormone

Hormones work as a team!

One hormone may be telling another organ what to do, while another hormone shows us how that organ has responded. A good example is testosterone.

If I only look at testosterone, I can see whether the level is low, high or within range.

But if I also look at LH and FSH, I get more information about the signalling behind testosterone production. That gives me a much better picture than looking at testosterone alone.

The same applies to female hormones. Looking at oestrogen, progesterone, testosterone, LH, FSH and prolactin together can help me understand the wider hormonal pattern.

Common Factors That Can Influence Hormone Levels

Factor	How it may influence hormone balance
Age & life stage	Hormone production naturally changes with age. Testosterone may gradually decline in men, while women experience significant changes through the menstrual years, perimenopause and menopause.
Stress	Ongoing physical or emotional stress can affect the hypothalamic–pituitary–adrenal and reproductive hormone systems, potentially influencing testosterone, oestrogen, progesterone, LH, FSH and prolactin.
Poor sleep	Inadequate or disrupted sleep can influence testosterone production, cortisol regulation, appetite hormones, insulin sensitivity and reproductive hormone signalling.
Medication	Some medicines can alter hormone production, metabolism or signalling. Examples include corticosteroids, opioids, some psychiatric medicines and certain hormonal treatments.
Iatrogenic factors	Surgery, radiotherapy, chemotherapy and other medical treatments can sometimes alter ovarian, testicular, pituitary or thyroid function.
Hormone treatments	HRT, testosterone replacement, hormonal contraception and other prescribed hormones can significantly alter measured hormone levels and need to be considered when interpreting results.
Underlying health conditions	Thyroid disorders, diabetes, insulin resistance, obesity, liver disease, kidney disease and other medical conditions may influence hormone production or metabolism.
Body weight & body composition	Both very low body fat and excess body fat can affect reproductive hormones. Adipose tissue is also metabolically active and can influence oestrogen metabolism and insulin sensitivity.
Blood glucose & insulin regulation	Insulin resistance and poor glucose control can interact with reproductive hormones and may contribute to hormonal disturbances.
Diet & energy intake	Long-term calorie restriction, under-eating, highly restrictive diets or inadequate protein and nutrient intake can affect hormone production and reproductive signalling.
Nutritional status	Nutrients including zinc, magnesium, selenium, iodine, iron, vitamin D and B vitamins play roles in normal endocrine and reproductive physiology. Deficiency may therefore contribute to altered function.
Alcohol	Regular or excessive alcohol consumption can influence liver metabolism of hormones and may affect testosterone, oestrogen and reproductive function.
Smoking	Smoking can influence hormone metabolism, circulation and reproductive health.
Exercise	Regular exercise generally supports metabolic health, but excessive training without adequate recovery or nutrition can suppress reproductive hormone signalling.
Sedentary lifestyle	Low activity levels may contribute indirectly through changes in body composition, insulin sensitivity and metabolic health.
Acute illness & inflammation	Infection, inflammation or significant illness can temporarily alter hormone levels. A result taken while someone is unwell may not reflect their usual baseline.
Chronic illness	Long-standing health conditions can affect hormone production, conversion, signalling and clearance.
Thyroid function	Thyroid hormones interact closely with metabolism and reproductive function. Altered thyroid function can therefore contribute to menstrual, fertility, energy and libido changes.
Pituitary function	The pituitary produces LH, FSH and prolactin and helps regulate thyroid and reproductive hormones. Changes in pituitary signalling can therefore affect several hormones simultaneously.
Liver function	The liver helps metabolise and clear hormones and produces important hormone-binding proteins. Changes in liver function can influence circulating hormone levels.
Menstrual-cycle timing	Oestrogen, progesterone, LH and FSH naturally fluctuate throughout the menstrual cycle, making the timing of female hormone testing important.
Pregnancy & breastfeeding	Pregnancy and lactation naturally produce major changes in Oestrogen, progesterone, prolactin and other hormones.
Perimenopause & menopause	Ovarian hormone production becomes increasingly variable during perimenopause before changing substantially after menopause.
Time of day	Some hormones follow a daily rhythm. Testosterone, for example, is generally higher earlier in the day, particularly in younger men.
Sexual/reproductive health	Conditions affecting the testes, ovaries or reproductive system may influence testosterone, Oestrogen, progesterone, LH or FSH.
Environmental & lifestyle influences	Shift work, disrupted circadian rhythms, major changes in routine and prolonged lifestyle stress can all influence endocrine regulation indirectly.

Hormone levels do not exist in isolation.

When I assess hormone biomarkers, I take into account the person's age, symptoms, medication, medical history, diet, nutritional status, lifestyle, stress, sleep and the timing of the test.

This is why seeing a hormone result within a laboratory reference range does not necessarily tell us the whole story and equally, one unusual result should not automatically be viewed in isolation. The value comes from looking at the individual, the symptoms and the relationship between the different biomarkers.

Male Hormone Check

The main markers I look at are:

Test	What it helps me look at
Testosterone	Gives me information about male hormone status, which can relate to energy, libido, muscle strength, motivation and general wellbeing.
LH	LH is one of the signals from the pituitary gland telling the testes to produce testosterone.
FSH	FSH is involved in sperm production and male reproductive function.
Prolactin	Prolactin can influence testosterone, libido and reproductive hormone function.

Looking at these together can be useful if somebody is experiencing things like low energy, reduced libido, low motivation, difficulty maintaining muscle, increased body fat, reduced performance or fertility concerns.

It can also be useful simply when a man feels that something has changed.

Female Hormone Check

Female hormones are naturally more variable because they change throughout the menstrual cycle and also change during perimenopause and menopause.

The main markers I look at are:

Test	What it helps me look at
Oestrogen / Oestradiol	Helps me assess estrogen activity and hormonal changes related to the menstrual cycle, perimenopause and menopause.
Progesterone	Can give useful information about ovulation and the second half of the menstrual cycle when tested at the right time.
Testosterone	Women also produce testosterone. It can relate to energy, libido, muscle strength and motivation.
FSH	Helps give information about ovarian function and can be useful when looking at menopausal changes.
LH	Plays an important role in ovulation and hormone signalling.
Prolactin	Can influence menstrual cycles, fertility, libido and overall reproductive hormone balance.

With women, timing matters.

A progesterone result, for example, can mean something very different depending on where you are in your cycle.

This is why I do not just look at the result and say, “That is normal” or “That is abnormal.”

I look at when the test was done, your age, your symptoms and where you are hormonally.

LH and FSH — Why Are They Important?

LH and FSH are hormones produced by the pituitary gland in the brain. You can think of them as signals. They are telling the ovaries or testes what to do.

That means they can help me understand whether the body is sending the correct signal, and how the reproductive organs are responding to it.

This becomes particularly useful when testosterone or Oestrogen levels do not quite fit with the symptoms someone is experiencing.

What About Prolactin?

Prolactin is another hormone made by the pituitary gland. Most people associate prolactin with breastfeeding, but it also has an important role in reproductive hormone balance. If prolactin is raised, it can sometimes affect libido, fertility, menstrual cycles and testosterone levels. So it can be a very useful part of the picture.

The Thyroid Can Also Be Part of the Story

Hormones do not work in isolation.

This is why, when necessary, I may also suggest looking at the thyroid.

The main thyroid markers I test include:

• TSH

• T4

• T3

  
  

Thyroid function can influence energy, metabolism, bowel function, concentration, mood, body weight, temperature regulation and reproductive function.

So if somebody has symptoms such as tiredness, weight changes, poor concentration or changes in hormonal wellbeing, the thyroid may also be worth checking.

One Result Does Not Tell the Whole Story

This is very important.

A hormone result is a snapshot of what was happening in your body at that moment.

Levels can be influenced by things such as:

• time of day

• menstrual cycle

• stress

• sleep

• illness

• medication

• hormone treatment

• exercise

• age

  
  

That is why I always interpret results in context. I am not interested in simply chasing numbers. I am interested in what those numbers mean for you.

What Can Hormone Biomarkers Tell Us?

They can help us answer questions such as:

• Is testosterone lower than expected?

• Is the pituitary signalling appropriately?

• Are female hormone changes in keeping with cycle stage or menopause?

• Could prolactin be affecting reproductive hormones?

• Is the thyroid contributing to tiredness or low energy?

• Is there a pattern that needs further support or investigation?

Sometimes the result is reassuring and it gives us a clearer direction. It shows us that further testing may be required with a GP or laboratory when appropriate

Same-Day Results

One of the advantages of point-of-care hormone testing is that, depending on the tests being run, results can be available during the same consultation.

This means we can sit down and go through the results together.

I can explain:

• what each hormone does

• what the result means

• how the hormones relate to each other

• whether anything stands out

• whether further testing may be useful

  
  

For me, that is the real value of biomarker testing. It is not just about getting a number. It is about helping you understand what that number may be telling us about your health.

Results available during your consultation.