Clinical nutrition care
Weight Gain & Undernutrition
Energy- and nutrient-dense plans for low weight, poor appetite and low lean mass.
Being underweight can affect energy, immunity, muscle strength, and overall wellbeing. At The Dietary Doctor, we help you gain weight in a healthy, sustainable way - with nutrient-dense foods and structured meals, not endless junk or force-feeding. The aim is a healthier weight and better nutrition, not just a higher number on the scale.
Underweight can stem from a fast metabolism, poor appetite, stress, illness, or past eating patterns. We work with you to understand the causes and build a plan that fits your appetite and lifestyle. We focus on calorie-rich but wholesome choices, regular meals and snacks, and, where relevant, strength-building so gains come from lean mass and better health.
Our Weight Gain programme is personalised to your needs, preferences, and any medical considerations - so you can reach a weight that supports your health and confidence.
How it actually works
Not gaining weight is rarely about eating more.
Appetite, absorption and what your body does with the surplus all matter. Force-feeding without fixing those just makes you uncomfortable.
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Appetite is genuinely low
Small stomach capacity, early fullness or stress means large meals are not achievable.
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Absorption may be the issue
Coeliac disease, IBS or another gut condition means food eaten is not food absorbed.
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Something may be burning it
Hyperthyroidism, undiagnosed diabetes or a chronic infection changes the arithmetic entirely.
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Surplus goes to fat, not muscle
Eating more without resistance training and adequate protein adds the wrong tissue.
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Energy and immunity suffer
Being underweight affects strength, immune function, hormones and cycles.
Is this you?
This plan is built for what you are actually dealing with.
If several of these sound familiar, they are almost certainly connected. That is the point — they get treated as one picture, not six separate complaints.
Not sure?
- Underweight or below a healthy BMI
- Unable to gain despite eating a lot
- Poor appetite or filling up very quickly
- Recovering from illness, surgery or a long infection
- Low stamina, weakness and frequent illness
- Wanting to add muscle rather than only weight
What tends to shift
Why these change, not just that they do.
Every claim below has a mechanism behind it. How quickly any of it moves depends on your body, your reports and how long things have been running — so we will not put a date on it.
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Calorie density without volume
The same nutrition in a smaller physical meal, which is the only way this works with a low appetite.
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Muscle rather than fat
Adequate protein plus progressive resistance work directs the surplus into lean tissue.
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Appetite that improves
Meal timing, spacing and gut support usually raise appetite over a few weeks.
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Underlying cause identified
Thyroid, coeliac disease, diabetes and absorption issues get ruled in or out rather than assumed away.
What we read
The numbers behind your plan.
Bring whatever reports you have. These are the markers we look at — and where something is missing that matters, we will tell you exactly what to ask your doctor for.
- TSH, T3, T4
- Haemoglobin and ferritin
- Vitamin D and B12
- Coeliac screen where indicated
- Fasting glucose and HbA1c
- Liver and kidney function
- Stool studies where indicated
- Body composition
We do not order tests or prescribe. Investigations are requested and interpreted by your doctor; we work from the results.
What is inside
Your plan includes
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Energy-dense meals in small volumes
Ghee, nuts, seeds, full-fat dairy and dried fruit used deliberately, so the plate stays a size you can finish.
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Strength work alongside the food
A structured resistance progression, so what you gain is muscle you keep rather than fat you then want to lose.
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One-to-one with a senior clinical dietitian
Not a chatbot and not a generic chart. A dietitian who reads your history and stays with your case.
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Weekly customised diet & lifestyle plans
Revised every week around your progress, your appetite and whatever your actual week looks like.
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Exercise & mobility guide
Movement matched to your condition and your current fitness, not a punishing gym programme.
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Behavioural & dietary techniques
The practical part: cravings, portion drift, eating out, festivals, travel and stress eating.
How this runs
Three steps, and none of them is a crash diet.
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We read your case
A free 15-minute call, then a full history: reports, medication, cycle, sleep, stress and what your week actually looks like.
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You get your plan
Built around food you already cook. Dal, roti, sabzi — portioned and paired for your condition, not a list of imported superfoods.
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We adjust as you go
Regular follow-ups with your dietitian. Reports get re-read, the plan moves with your results — and with a wedding or a work trip.
Questions
Before you book.
Should I just eat more junk food to gain weight?
It will add weight, mostly as visceral fat, and will worsen your lipids and glucose while it does. Being underweight and metabolically unhealthy at the same time is entirely possible, and worth avoiding.
Why can I not gain when I eat a lot?
Usually one of three things: intake is lower than it feels, absorption is impaired, or something like an overactive thyroid is burning through it. All three are testable, and that is where we start.
Is this just a diet chart?
No. A chart is a page; this is a plan that gets revised weekly against your reports, your symptoms and your week. The behavioural side — cravings, portions, eating out, festivals — is treated as part of the clinical work rather than willpower you are supposed to find on your own.
Will I have to give up Indian food?
No. Plans are built from dal, roti, sabzi, rice and the food you already cook. Portioning, pairing and timing do most of the work. A plan that needs imported ingredients is a plan you abandon in a month.
How is the plan adjusted as I go?
Weekly. Your dietitian reviews what actually happened — what you ate, how you slept, what the scale and your symptoms did — and adjusts. When you bring fresh reports, they are read and the plan moves with them.
Can I talk to someone before deciding?
Yes. The first call is free and about fifteen minutes, with no payment and no sales pitch. You will leave it knowing what we would look at first, whether or not you sign up.
A note on scope. This page describes individualised clinical nutrition care: a clinical consultation, your health and nutrition history, review of your medical and laboratory reports where you have them, a nutritional assessment, a therapeutic nutrition plan written for you, and clinical follow-up at which progress is monitored and the plan is modified. It works alongside medical treatment rather than replacing it. We do not diagnose conditions, order investigations, or prescribe, change or stop medication — those belong with your doctor. If something in your reports needs medical attention, we will tell you and say what to ask for.
Next step
Bring your reports. We will read them properly.
The first call is free and 15 minutes. No payment, no sales pitch — you will leave knowing what to fix first, whether or not you sign up.