What Should You Eat While Taking GLP-1 Medication? A Practical Nutrition Guide
19 August, 2026

What Should You Eat While Taking GLP-1 Medication? A Practical Nutrition Guide

GLP-1 and related weight-management medicines can significantly reduce your appetite. You may feel full much sooner, eat smaller portions or sometimes lose interest in food altogether.

While eating less is part of how these medicines support weight loss, your body still needs protein, fibre, fluids, vitamins and minerals. The goal is to make the food you can manage as nutritionally useful as possible.

NYN GLP-1 Journey Support was created with this challenge in mind, providing nutritional support in one compact, easy-to-prepare pouch.

Please remember: This guide provides general information and does not replace advice from your doctor, pharmacist or dietitian. Always take your medication exactly as prescribed.

What are GLP-1 medications?

GLP-1 receptor agonists are medicines that can reduce hunger, help you feel fuller for longer and slow digestion.

They include:

  • Wegovy®, which contains semaglutide

  • Saxenda®, which contains liraglutide

  • Mounjaro®, which contains tirzepatide

Mounjaro is slightly different because it acts on both GIP and GLP-1 receptors. It is correctly described as a dual GIP/GLP-1 receptor agonist.

These medicines are intended to be used alongside a balanced, reduced-calorie diet, increased physical activity and ongoing support from healthcare professionals.

What should you eat?

There is no single “GLP-1 diet” that works for everyone. A good starting point is to build smaller, balanced meals around four main areas:

  • Protein

  • Vegetables or fruit

  • Fibre-containing carbohydrates

  • A small amount of suitable dietary fat

Eat slowly and stop when you feel comfortably full. You do not need to force yourself to finish a large meal.

Make protein a priority

Protein is particularly important during weight loss because it contributes to the growth and maintenance of muscle mass.

Good protein choices include:

  • Eggs

  • Chicken, turkey and lean meat

  • Fish

  • Greek yoghurt, Skyr or cottage cheese

  • Tofu and tempeh

  • Beans, chickpeas and lentils

  • Nuts and seeds

Try to include a source of protein whenever you eat. If your appetite is small, eating the protein part of your meal first may help you make the most of what you can manage.

How NYN can help

Each serving of NYN provides 25.5g of total protein from pea and rice protein together with 3g of hydrolysed bovine collagen.

This makes NYN a convenient option when preparing or finishing a conventional protein-rich meal feels difficult.

Because the formula contains bovine collagen, NYN is not suitable for vegans or vegetarians.

Do not forget about fibre

Fibre is an important part of a balanced diet. Adults in the UK are advised to aim for around 30g per day.

Useful sources include:

  • Vegetables and fruit

  • Oats and wholegrain cereals

  • Wholegrain bread

  • Brown rice and wholewheat pasta

  • Beans, peas and lentils

  • Nuts and seeds

Constipation is a common side effect of GLP-1-based medication. Eating enough fibre, drinking regularly and keeping active may help, but fibre should be increased gradually. Adding too much too quickly may make bloating and discomfort worse.

Each NYN serving contains 5.9g of fibre from ingredients including partially hydrolysed guar gum, inulin, resistant starch and acacia fibre. This can make a useful contribution towards your daily intake.

NYN is high in fibre, but it should not be described as a treatment for constipation or other digestive problems.

Choose carbohydrates that offer more

Carbohydrates can still be part of a balanced diet while using weight-management medication. Where possible, choose options that also provide fibre and other nutrients.

These include:

  • Oats or porridge

  • Wholegrain bread or crackers

  • Potatoes or sweet potatoes

  • Brown rice or quinoa

  • Wholewheat pasta

  • Beans and lentils

  • Fruit and vegetables

If you are feeling sick, simpler foods such as plain toast, crackers, rice, pasta or mashed potato may be easier to manage temporarily.

NYN contains 10.6g of carbohydrate and 2.3g of sugars per labelled serving.

If you have diabetes and use insulin or another glucose-lowering medication, speak to your diabetes team about how different foods and drinks fit into your individual plan.

Keep drinking regularly

A reduced appetite can sometimes mean you drink less too. Vomiting and diarrhoea can increase the risk of dehydration, so regular fluid intake is important.

Water, sugar-free squash and unsweetened tea or coffee can all contribute. General NHS guidance often recommends around two litres of fluid each day, but individual requirements vary.

People with kidney disease, heart failure or a prescribed fluid restriction should follow the advice of their healthcare team.

NYN is prepared with 250ml of cold water and contains potassium and magnesium. However, it is not an oral rehydration product and should not be used to treat dehydration.

Contact your healthcare team if you:

  • Cannot keep fluids down

  • Are passing very little urine

  • Notice your urine becoming very dark

  • Feel unusually dizzy or lightheaded

Getting enough vitamins and minerals

When you eat smaller portions, you have fewer opportunities to get all the vitamins and minerals your body needs.

NYN provides declared amounts of 23 vitamins and minerals, including:

  • Vitamins A, C, D3, E and K2

  • Vitamins B1, B2, B3, B5, B6 and B12

  • Folate

  • Magnesium

  • Potassium

  • Calcium

  • Iron

  • Zinc

  • Selenium

  • Copper

  • Manganese

  • Molybdenum

  • Iodine

  • Chromium

Together, these nutrients have established roles in normal areas of health such as:

  • Energy-yielding metabolism

  • Reduction of tiredness and fatigue

  • Normal immune-system function

  • Normal muscle and bone health

  • Normal nervous-system function

  • Normal blood formation

  • Protection of cells from oxidative stress

  • Normal thyroid function

These are normal nutritional functions. They do not mean NYN treats tiredness, prevents muscle loss, controls diabetes or cures any nutritional deficiency.

The product contains a particularly high amount of vitamin B12 relative to the standard Nutrient Reference Value, so consider your total intake from other fortified foods and supplements.

If you take warfarin or another anticoagulant, have kidney disease, manage diabetes with medication, are pregnant or breastfeeding, check the complete formula with a healthcare professional before use.

What about the other ingredients?

NYN also contains:

  • Hydrolysed bovine collagen

  • L-tyrosine

  • Lion’s Mane mushroom powder

  • L-theanine

  • Digestive enzymes

  • A probiotic blend

  • CDP-choline

  • Ginger extract

  • Coenzyme Q10

  • Buckwheat germ extract

These ingredients form part of the wider NYN formula. However, their presence should not be used to claim that NYN treats nausea or constipation, improves cognition, produces a specific probiotic benefit or supports longevity.

NYN is nutritional support, not a treatment for medication side effects.

What can you eat when feeling sick?

Nausea is a common side effect of GLP-1 and dual GIP/GLP-1 medication. When you feel sick, try smaller portions of simple foods such as:

  • Dry toast or plain crackers

  • Plain porridge

  • Rice, pasta or potatoes

  • Eggs

  • Plain Greek yoghurt

  • Soft tofu

  • Bananas or melon

  • Steamed carrots or courgettes

Eat slowly and avoid lying down immediately after eating. Very rich, fatty, spicy or strong-smelling foods may make nausea worse for some people.

Do not force yourself to drink NYN or eat other food during persistent vomiting or severe nausea. Contact your healthcare team if symptoms are ongoing or you cannot keep fluids down.

A simple example day

Here is an example of how you might structure your day:

Breakfast: Greek yoghurt with oats and berries.

Lunch: A small chicken, tofu or chickpea salad with wholegrain bread.

Afternoon option: NYN GLP-1 Journey Support when appetite or convenience makes a conventional option difficult.

Evening meal: Fish, lean meat, tofu or lentils with vegetables and a small portion of potato or rice.

Fluids: Water and other unsweetened drinks throughout the day.

Your portions should reflect your appetite, nutritional needs and medical advice.

How to prepare NYN

Remove the cap, add 250ml of cold water, replace the cap and shake well for 30 seconds.

Enjoy immediately or prepare it in advance and chill it in the fridge for an extra-refreshing drink.

One labelled serving provides:

  • 170.8 calories

  • 25.5g protein

  • 5.9g fibre

  • 10.6g carbohydrate

  • 2.3g sugars

  • 4.2g fat

  • 23 vitamins and minerals

The bottom line

Eating well while taking GLP-1 medication does not need to be complicated.

Focus on smaller, balanced meals containing protein, fibre, vegetables, suitable carbohydrates and regular fluids. Eat slowly, listen to your appetite and seek help if side effects make it difficult to eat or drink.

NYN offers a compact way to obtain protein, fibre and a wide range of vitamins and minerals when a full meal feels difficult. It is designed to support your nutritional intake, not replace a varied diet, medical treatment or professional advice.

Explore NYN GLP-1 Journey Support.

Sources and further reading