UK weight loss medicine prices
Eating well on a smaller appetite: the guides
Protein, fibre, fluids and the meals that stay down when you can only manage a little.
6 guides by Sian Anderson. Every clinical claim links to its source. Information, not medical advice. Updated 21 October 2026.
A weight loss medicine shrinks your appetite. What you eat in the smaller space matters more than it did. These guides cover protein first, then fibre, fluids, alcohol, the meals that stay down when you feel sick, and the signs you are eating too little.
Every guide in this section
Constipation on a weight loss jab: fibre, fluid and what works
Why the medicines cause constipation, the 30g fibre target most UK women miss by a third, the foods that get you there on a small appetite, and when to use a laxative.
Drinking enough on a weight loss jab, when you never feel thirsty
Why dehydration is the hidden cause of the headaches, dizziness and constipation on weight loss medicines, the 6 to 8 glass target, and how to drink more when you feel full.
Meals that stay down: eating through the nausea weeks
Nausea is the most common side effect of every weight loss medicine, worst in the first weeks and after each dose rise. The foods that help, the ones that make it worse, and a week of meals.
Alcohol on a weight loss jab: what changes
You can drink on the medicines, but it hits harder, the hangover is worse and many people lose the taste for it. The UK 14-unit limit, the blood sugar point, and the pancreas warning.
Eating too little on a weight loss jab: the warning signs
The medicines can switch appetite off so well that you under-eat for weeks. The signs, the gallstone risk the leaflets warn about, the 800-calorie line, and how to eat enough without forcing it.
Where this overlaps
Bodies do not sort themselves into chapters. These guides from other sections come up again and again alongside this one.
- Keeping muscle while the scales drop (Strength and movement)
- Eating well through the menopause (Menopause and midlife)
- Walking: the exercise that fits a weight loss jab (Strength and movement)
- Hair loss on weight loss medicines: why it happens and when it stops (Weight loss medicines and women)
- Tired all the time: the causes in women and the tests to ask for (Being heard: women and medicine)
Eating well on a smaller appetite: questions
How much protein do I need on a weight loss jab?
Many dietitians aim for around 1.2 to 1.6g per kg of body weight a day while losing weight. The protein guide shows how to reach it on small portions.