Sometimes, despite following a conscious diet and exercising regularly, body weight does not decrease as expected. In such cases, it may be worth considering an assessment of hormonal factors, as metabolic regulation depends on the coordinated function of several endocrine systems.
Thyroid hormones play a key role in regulating energy expenditure. Reduced thyroid function (hypothyroidism) can slow metabolism, potentially contributing to weight gain or making weight loss more difficult. Laboratory testing of TSH, as well as free T3 (fT3) and free T4 (fT4), can provide information about current thyroid function.
Insulin resistance is another common factor that may contribute to difficulty losing weight. In this condition, cells become less sensitive to insulin, which can impair blood glucose regulation and may promote increased fat storage. Assessment typically involves measuring blood glucose and insulin levels, often as part of an oral glucose tolerance test (OGTT).
Chronic stress can lead to elevated cortisol levels, which may adversely affect metabolism over time. Persistently elevated cortisol may increase appetite, particularly cravings for carbohydrate-rich foods, and may contribute to increased abdominal fat accumulation.
Hormones involved in regulating hunger and satiety also play a role in body weight management. Leptin contributes to feelings of fullness, while ghrelin stimulates hunger. Disruptions in the balance of these hormones – for example, due to sleep disturbances, irregular eating patterns or chronic stress – may also make weight loss more difficult.
Hormonal imbalances can be investigated through targeted laboratory testing. However, laboratory results should always be interpreted as part of a comprehensive assessment. Consultation with a specialist can help determine the extent to which identified abnormalities may be contributing to changes in body weight and what treatment or lifestyle measures may be appropriate.
Frequently Asked Questions
When should I consider having hormone tests?
If weight loss does not occur despite sustained lifestyle changes, or if other symptoms such as fatigue, hair loss or menstrual irregularities are also present, hormonal testing may be worth considering.
Does an underactive thyroid always cause weight gain?
No. However, hypothyroidism can slow metabolism and may make weight loss more difficult.
Can insulin resistance be reversed?
It can often be significantly improved through appropriate dietary and lifestyle changes and, where necessary, medical treatment.
Does stress really affect body weight?
Yes. Persistently elevated cortisol levels may contribute to increased fat storage and increased appetite.
Is a single laboratory test enough to identify hormonal causes?
Not necessarily. An accurate assessment often requires several parameters to be evaluated together, along with medical consultation.