WEIGHT LOSS
Why Am I Not Losing Weight Despite Trying?
Common barriers to weight loss, when a plateau is not failure, and when medical review may be the right next step.
Weight regulation is influenced by far more than willpower. Appetite signalling, metabolic rate, hormonal status, sleep quality, stress, medication, mood, alcohol intake, mobility, and deeply established eating patterns all play a role. Some patients lose weight initially and then plateau despite continuing the same approach. Others find that weight regain follows every attempt at restriction — a cycle that is physiologically driven, not a failure of character.
In women, menopausal change can contribute through altered fat distribution, disrupted sleep, increased appetite, and reduced metabolic rate. In men, declining testosterone, poor sleep, reduced activity and rising metabolic risk may be relevant.
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Common medical reasons weight loss stalls
Hypothyroidism can slow metabolism and make weight loss significantly harder. Insulin resistance — common in pre-diabetes and PCOS — can make the body more efficient at storing fat even when calorie intake is controlled. Certain medications, including some antidepressants, anticonvulsants, beta-blockers, corticosteroids and hormonal contraceptives, can promote weight gain or make loss more difficult. Chronic stress raises cortisol, which can affect appetite, fat distribution and sleep. Poor sleep itself disrupts the hormones that regulate hunger and satiety, making overeating more likely even when the patient is otherwise making sensible choices.
Investigation
When investigation helps
Targeted blood tests can help identify treatable contributors. Thyroid function testing rules out or confirms hypothyroidism. HbA1c and fasting glucose assess insulin resistance and diabetes risk. Liver function markers can flag fatty liver disease. Hormone testing — oestrogen, progesterone, testosterone, DHEA — may be relevant where hormonal change appears to be influencing weight. A broader health screening review can pull these together into a more complete clinical picture.
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Next step
When the approach needs changing, not intensifying
If you have been trying to lose weight and are not getting the results you expected, the answer is rarely to restrict harder or exercise more aggressively. More often, it means the approach needs clinical review — assessing whether there is a medical contributor, whether medication is affecting things, whether the strategy itself is sustainable, or whether medical treatment such as GLP-1 prescribing would be more effective for your situation.
Common questions
What medical factors commonly stall weight loss?
Hypothyroidism, insulin resistance (common in pre-diabetes and PCOS), certain medications (some antidepressants, anticonvulsants, beta-blockers, corticosteroids, hormonal contraceptives), chronic stress, and poor sleep all commonly contribute. These are treatable contributors rather than fixed barriers.
When are blood tests worth doing if weight loss isn’t happening?
When lifestyle change alone has not produced results, when there are other symptoms (fatigue, cold intolerance, cycle change, hair thinning), when menopausal or testosterone change is suspected, or when metabolic markers may be drifting. A targeted blood panel — thyroid, HbA1c, liver, hormones as appropriate — helps identify treatable contributors.
When is medical treatment a more appropriate next step than restricting harder?
If you have been trying to lose weight through lifestyle change without sustained results, restricting harder or exercising more aggressively is rarely the answer. A clinical review is more useful — assessing whether there is a medical contributor, whether medication is affecting things, whether the strategy itself is sustainable, or whether medical treatment including GLP-1 prescribing would be clinically appropriate.
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