Is It My Thyroid... or Am I Just Getting Older?
"I suppose it's just my age."
It's one of the most common things I hear from women in their 40s and 50s.
They're exhausted despite getting a full night's sleep. They've gained weight without changing how they eat. Their brain feels foggy, they can't concentrate, motivation is gone, and they barely recognise themselves anymore.
Friends, family, and even health professionals reassure them that it's simply part of getting older.
But is it?
The truth is that while ageing does bring changes, feeling unwell shouldn't simply be accepted as normal. Very often, there is more going on beneath the surface.
Ageing and thyroid symptoms look remarkably similar
One of the reasons thyroid problems are so commonly overlooked is because the symptoms overlap with both ageing and perimenopause:
Constant fatigue
Weight gain, especially around the abdomen
Brain fog and poor concentration
Feeling flat or low in mood
Dry skin and thinning hair
Constipation
Feeling cold when everyone else seems comfortable
Muscle aches and slower recovery
Reduced motivation and drive
It's easy to assume these changes are simply because you're getting older.
But many of these are also classic signs that your thyroid may not be functioning optimally.
Your thyroid affects almost every cell in your body
The thyroid is often described as your body's metabolic engine.
Its hormones influence how efficiently your cells produce energy, regulate body temperature, support brain function, maintain healthy digestion, and even affect cholesterol and blood sugar regulation.
When thyroid hormone levels become inadequate—or when your body struggles to activate thyroid hormone properly—your whole body can begin to slow down.
Many women tell me they feel like someone has dialled down their body.
The challenge during perimenopause
Perimenopause makes things even more confusing.
As oestrogen and progesterone fluctuate, women commonly notice:
Poor sleep
Increased anxiety
Weight gain
Mood changes
Reduced resilience to stress
Brain fog
Sound familiar?
These symptoms overlap almost perfectly with thyroid dysfunction.
To make matters even more complicated, hormonal changes during perimenopause can also influence how thyroid hormones work throughout the body. Rising inflammation, chronic stress, poor blood sugar regulation, and nutrient deficiencies can all reduce the conversion of T4 into the active thyroid hormone T3.
This means your thyroid blood tests may appear "normal", while your cells are still not receiving enough active thyroid hormone - hello cellular hypothyroidism.
Normal blood tests don't always tell the full story
This is one of the biggest frustrations for many women.
They've had a thyroid test. They've been told everything is "normal." Yet they still feel exhausted.
While standard thyroid testing is a starting point, it doesn't always reveal the complete picture.
What needs to be tested I find is different for everyone to start understanding their driving factors for ill-health, but looking in detail at your thyroid bloods is always going to be better then a singular TSH lab on it’s own.
So... is it your thyroid or simply getting older?
Sometimes it really is the natural hormonal transition of perimenopause.
Sometimes it is an underactive thyroid.
Sometimes it's Hashimoto's, the autoimmune condition that gradually damages the thyroid.
And very often, it's a combination of several factors working together.
Rather than assuming it's "just ageing," it's worth asking a better question:
What is my body trying to tell me?
Because when you identify the underlying causes—whether that's thyroid dysfunction, nutrient deficiencies, inflammation, stress, or hormonal changes—you have the opportunity to actually improve how you feel.
Growing older is inevitable.
Feeling exhausted, foggy, and unlike yourself doesn't have to be.
If you've been wondering whether your symptoms are simply part of ageing or whether your thyroid could be playing a role, it's worth looking beyond a single blood test and exploring the bigger picture. Your body deserves more than being told, "It's just your age."
Natasha Gedrim (BHSc Naturopathy)
Thyroid and Hormone Naturopath
