Nutrition And Muscle

This article is general education. If you have kidney disease, frailty, an eating disorder, complex medical needs, pregnancy or breastfeeding, ask for individual advice before changing your diet significantly.

Last reviewed: 13 July 2026

Protein is not just for bodybuilders. It is one of the raw materials your body uses to repair, rebuild and stay strong. When appetite is reduced, protein becomes easier to miss.

Quick Answer

Protein matters during weight loss because it helps protect muscle. This is especially important if you are eating less than usual or losing weight quickly.

A simple rule is: include a protein food whenever you eat. Protein first, but not protein only.

Why Muscle Matters

When people lose weight, they can lose some muscle as well as fat. We want to reduce this as much as possible.

Strength

Muscle helps you climb stairs, carry shopping, get up from chairs and stay independent.

Metabolism

Muscle is active tissue. Protecting it supports long-term health.

Balance

Stronger muscles can support balance and reduce falls risk as we age.

Blood sugar

Muscle helps the body use glucose, which matters for metabolic health.

Recovery

Protein supports healing, immune cells, skin, hair and body repair.

Confidence

Feeling stronger can change how people move through everyday life.

Protein First, But Not Protein Only

If your appetite is small, it makes sense to eat the protein part of your meal early. But do not let protein crowd out everything else.

Your body still needs fibre, carbohydrates, healthy fats, vitamins, minerals and fluid. The goal is a smaller plate that is still nourishing.

Good Protein Foods

Choose foods you enjoy and can manage. You do not need every meal to be perfect.

Eggs

Easy, soft, versatile and useful when appetite is low.

Greek yoghurt

Works well with berries, oats, seeds or fruit.

Fish

Tinned tuna, salmon, sardines or fresh fish can be simple options.

Chicken or lean meat

Useful in small portions with vegetables or salad.

Beans and lentils

Protein plus fibre, and often kind to the budget.

Tofu or tempeh

Good plant-based options that can be added to stir-fries, soups or bowls.

Cottage cheese

Soft, quick and useful with jacket potato, salad or oatcakes.

Nuts and seeds

Small portions can add protein, healthy fats and minerals.

What Does Protein Look Like?

You do not need to weigh everything. These are rough examples to help you picture how much protein different foods provide. Amounts vary by brand, portion size and how food is prepared.

Chicken breast25-35 gOne cooked chicken breast or a palm-sized portion.
Greek yoghurt15-20 gA small pot or bowl, depending on brand and size.
2 eggs12-14 gUseful for breakfast, lunch or a small meal.
Tinned tuna20-25 gOne small drained tin, mixed into potato, salad or pasta.
Cottage cheese15-20 gA few generous spoonfuls with potato, salad or oatcakes.
Tofu12-18 gA portion in a stir-fry, soup, curry or bowl.
Beans or lentils8-12 gA generous serving in soup, chilli, curry or stew.
Handful of nuts5-7 gAlso provides healthy fats, so a small handful is enough.

Do I Need Protein Shakes?

Most people do not need protein shakes if they can manage enough protein from food. Whole foods also bring fibre, vitamins, minerals and texture, which matter too.

That said, a protein yoghurt, milk drink or shake can sometimes be useful if appetite is very low, you are struggling after a dose increase, or you need a convenient option. Try not to let shakes replace learning how to build nourishing meals.

Protein Needs Strength Work Too

Protein helps provide building blocks, but muscles also need a reason to stay strong. NHS guidance recommends adults do strengthening activities that work the major muscle groups on at least 2 days a week.

This does not have to mean a gym. It can include sit-to-stands, squats, resistance bands, carrying shopping, stairs, weights, yoga, pilates or bodyweight exercises.

If You Can Only Manage Small Meals

Breakfast

Greek yoghurt with berries, oats and seeds.

Lunch

Lentil soup with yoghurt or cheese on the side.

Snacky meal

Hummus, oatcakes, cucumber, peppers and a boiled egg.

Soft meal

Cottage cheese or tuna with jacket potato.

Quick option

Ready-cooked chicken or tofu with microwave grains and vegetables.

Low appetite day

Milk, yoghurt, soup or a nourishing smoothie may be easier than a full plate.

Where To Read Next

Eating well

How to make every bite count when appetite is reduced.

Read next

Calories

Calorie awareness, not calorie obsession, and the small appetite plate.

Read next

Fibre

Constipation, gut health and how to increase fibre gently.

Read next

Building habits

Use quieter appetite to build habits that support long-term health.

Read next

Side effects

What is common, what helps and when to seek advice.

Read next

Dr Mel’s Notebook

Did you know?

Protein supports muscles, but strength activity is what tells your body those muscles are still needed.

Try this today

Add one protein food to your next meal or snack: eggs, yoghurt, beans, fish, tofu, chicken, cottage cheese, nuts or seeds.

The evidence

The NHS Eatwell Guide includes beans, pulses, fish, eggs, meat and other protein foods as part of a balanced diet, and NHS activity guidance recommends strengthening activities at least twice a week.

Key Messages

  1. Protein matters during weight loss because it helps protect muscle.
  2. Protein is not just for bodybuilders.
  3. Eat protein first when appetite is small, but not protein only.
  4. Most people do not need protein shakes, but they can be useful in selected situations.
  5. Strength activity helps tell your body to keep muscle.
  6. The goal is a smaller plate that is still nourishing.

Useful Sources

NHS: The Eatwell Guide

NHS: Physical activity guidelines for adults

NHS: Strength exercises

Mounjaro KwikPen Patient Information Leaflet, emc

Last reviewed: 13 July 2026. Planned review: October 2026.