Obesity & Weight Management

Weight is regulated by hormones — insulin, leptin, ghrelin, GLP-1, thyroid and cortisol among them — and by sleep, stress, medication and genetics. Body weight is defended: lose some, and appetite rises while resting energy expenditure falls, which is precisely why most diets are followed by regain. That is biology, not weakness.

Understanding obesity as a disease of that regulatory system, rather than a character flaw, changes the conversation from blame to treatment. In practice, that is usually the point at which progress starts.

Why it deserves an endocrinologist

Obesity is where most of what an endocrine clinic treats begins. Type 2 diabetes, fatty liver, dyslipidaemia, hypertension, obstructive sleep apnoea, PCOS/PMOS, subfertility, gout and osteoarthritis all track with it — and all of them improve when weight comes down. Treating the weight is often the most efficient way to treat everything else at once.

It also cuts the other way: several endocrine conditions cause weight gain and are missed if nobody looks. Hypothyroidism, Cushing's syndrome, hypothalamic damage and growth hormone deficiency all present this way, as do a long list of everyday medicines — glucocorticoids, insulin and sulphonylureas, some antipsychotics and antidepressants, sodium valproate, beta blockers and, sometimes, hormonal contraception.

What a first consultation involves

Measurement that means something. BMI is crude and particularly misleading in South Asians, who carry more visceral fat and develop metabolic disease at lower BMIs than European populations — the thresholds for overweight and obesity are correspondingly lower here. Waist circumference is measured alongside it, and waist-to-height ratio is often the more useful figure. Body composition is assessed where it will change management.

A search for treatable causes. Thyroid function, and screening for cortisol excess, PCOS/PMOS and sleep apnoea where the picture suggests them. A review of every current medicine, because switching one is sometimes the whole answer.

An honest measure of the consequences. Fasting glucose and HbA1c, a lipid profile, liver enzymes with an assessment for fatty liver and fibrosis, blood pressure measured properly, uric acid, and vitamin D and B12.

A conversation about history. When the weight started, what has been tried, what worked and for how long, what triggered regain. Childhood-onset obesity, weight gain after a pregnancy or a bereavement, and steady creep through the thirties are different problems needing different plans.

Nutrition, built around what you actually eat

A plan copied from a foreign template will be abandoned inside a month. The work is in the specifics of your own kitchen: how much rice or roti and at what time of day, what protein appears at each meal, how much oil the cooking uses, and which habits are doing the real damage — sweetened tea several times a day, biscuits with each cup, dinner at eleven, restaurant food twice a week.

The principles that hold across almost every plan: enough protein at every meal to protect muscle while losing fat; enough fibre from vegetables, dal and whole grains; fewer refined carbohydrates and less sugar in liquid form; and a consistent eating window rather than skipped meals followed by a large late dinner. Extreme short-term diets reliably fail, and repeated cycles of loss and regain leave people worse off than before.

Activity — and what it is for

Exercise is a poor tool for losing weight and an excellent one for keeping it off, for protecting muscle, and for improving insulin sensitivity, blood pressure, sleep and mood independently of the scale. Targets start from what is genuinely achievable this week, not from a guideline. Resistance work matters as much as walking, particularly during active weight loss and particularly for anyone on GLP-1 therapy, where muscle is otherwise lost alongside fat.

Medication

The GLP-1 and dual GIP/GLP-1 receptor agonists have genuinely changed what medical weight management can achieve — losses that previously required surgery are now reachable with an injection. They are considered where lifestyle measures alone have proved insufficient and the clinical indication is met, and they are prescribed with a frank discussion of side effects, monitoring, cost and duration.

Two things are worth saying plainly. First, these are treatments for a chronic disease: weight is regained when they are stopped, in the same way blood pressure rises when an antihypertensive is stopped, so the plan has to be one you can sustain. Second, they work with nutrition and resistance exercise, not instead of them — otherwise a substantial part of what is lost is muscle. Orlistat and, in selected cases, metformin have their place too.

Bariatric and metabolic surgery

At higher BMIs, or at lower ones where type 2 diabetes or another serious complication is present, surgery is a legitimate and highly effective option, and often the one most likely to put diabetes into remission. Referral is made where appropriate, with the pre-operative assessment and the lifelong nutritional follow-up — B12, iron, calcium, vitamin D and protein — arranged as part of the same care rather than left to chance.

What success actually looks like

A sustained loss of five to ten per cent of body weight measurably improves blood sugar, blood pressure, lipids, fatty liver, sleep apnoea and joint pain. Ten to fifteen per cent can put early type 2 diabetes into remission. Those are clinically meaningful results and realistic first goals — and they are a very long way from the number most people arrive hoping for, which is worth discussing openly at the start rather than treating as failure six months in.

Weight is also not the only measure of progress. Waist size, blood pressure, HbA1c, liver enzymes, how many stairs you can manage and how you sleep all move before the scale does, and all of them count.