Do you struggle with fatigue, unexpected weight gain, or feeling the cold more than those around you? If so, your thyroid gland may need some extra attention.
The thyroid, a small gland located just below your Adam’s apple, weighs less than an ounce but has a powerful role in controlling your body’s metabolism. When it slows down, many body processes follow suit, leading to a wide range of symptoms.
What Is an Underactive Thyroid?
An underactive thyroid (hypothyroidism) occurs when the gland doesn’t produce enough of the hormone thyroxine (T4). Some people may also struggle to convert T4 into its active form, triiodothyronine (T3). Blood tests can help determine hormone levels.
Causes of Hypothyroidism
Common causes and risk factors include:
Family history of thyroid disease
Increasing age
Autoimmune conditions (such as Hashimoto’s thyroiditis)
Certain medications or past surgery
Nutrient deficiencies, particularly iodine
Women are more likely than men to develop hypothyroidism.
Symptoms of an Underactive Thyroid
Hypothyroidism can affect many systems in the body. Typical symptoms include:
Persistent fatigue and weakness
Feeling unusually cold
Weight gain that’s difficult to lose
Hair loss or thinning
Constipation
Dry or flaky skin, brittle nails, cracked heels
Low mood, depression, or tearfulness
PMS and loss of libido
Headaches, dizziness, or slowed speech
Low morning energy but feeling better after exercise
Recurrent infections
Slow heart rate and shortness of breath
High cholesterol or triglyceride levels
How Common Is It?
Hypothyroidism is more widespread than most people realise. Millions of people may have low thyroid function without knowing it. Around 1 in 10 women are thought to have some degree of thyroid hormone deficiency. The severity varies, from mild imbalances to significant hormone depletion.
Types of Hypothyroidism
Clinical Hypothyroidism: Clear abnormalities in T3 and T4 levels detected in blood tests.
Subclinical/Functional Hypothyroidism: Blood tests appear normal, but symptoms and temperature checks point to a mild deficiency.
Testing and Diagnosis
If you suspect an underactive thyroid, your first step should be a GP appointment for blood testing and diagnosis. Functional medicine practitioners may carry out additional investigations, but only your GP can provide an official diagnosis. Many people combine conventional treatment with nutritional or lifestyle support. If you are prescribed thyroid medication, check for possible interactions before adding supplements.
Natural Support for Thyroid Health
Alongside medical treatment, nutrition and herbal support may help optimise thyroid function.
Key Nutrients:
Tyrosine – essential amino acid for thyroid hormone production.
Iodine – critical for hormone synthesis; kelp is a good natural source.
Selenium – required to convert T4 into active T3. Shop here
Vitamin A – supports hormone production.
Magnesium & Calcium – balance is vital for thyroid activity.
B Vitamins, Vitamin C, Zinc, Copper – support adrenal health and hormone regulation.
Herbal Support:
Liquorice root – strengthens adrenal function, which is closely linked to thyroid health.
Gum guggul – a resin from the mukul myrrh tree that helps convert thyroid hormones effectively. Shop here
✅ Bottom Line: If you often feel tired, sluggish, or unwell, it may be worth checking your thyroid health. With the right diagnosis and a combination of medical care, nutrition, and natural support, many people find relief from symptoms and regain their energy.