What to Eat on GLP-1 Medication: A Practical Nutrition Guide

With expert insights from Julie-Ann Yap, Dietitian and Nutritionist

If you're taking a GLP-1 medication, you've probably noticed that eating feels different. Meals that once felt normal-sized now feel like plenty, and hunger doesn't show up the way it used to. That's the medication doing exactly what it's designed to do, but it also raises a real question: what should you actually be eating now that you're eating less?

This guide breaks down the nutrition basics that matter most while you're on a GLP-1 medication, so you can support your body through the change rather than just riding it out.

How GLP-1 Medication Changes the Way You Eat

GLP-1 (glucagon-like peptide-1) medications work by mimicking a hormone your gut naturally releases after eating. That hormone signals to your brain that you're full, slows down how quickly your stomach empties, and helps regulate blood glucose. The result is that you feel fuller on less food, and hunger cues show up less often.

It's worth remembering that these medications aren't a standalone solution. They work best as part of a bigger picture that includes nutrition, movement and sustainable habits, rather than something that replaces the need to think about food at all.

Why Nutrition Quality Matters More Now

When you're eating less overall, every meal has to work harder. There's simply less room for foods that don't offer much nutritionally, and more reason to make deliberate choices about what goes on your plate.

Here's what to focus on.

Prioritise protein first

Adequate protein intake becomes especially important on GLP-1 medication, because reduced appetite often means reduced food intake overall, and protein is usually the first thing to drop off. A general guide is 1.2 to 1.6 grams of protein per kilogram of body weight per day. For example, someone weighing 80kg would be looking at roughly 96 to 128 grams of protein daily to help preserve muscle during weight loss.

Good sources include:

• Chicken, lean beef or lamb

• Eggs

• Greek yoghurt or high-protein yoghurt

• Cottage cheese

• Tofu or tempeh

• Fish, including tuna and salmon

• Legumes, lentils and edamame

Build meals around nutrient-dense whole foods

Fruits, vegetables, whole grains, legumes, dairy, lean proteins, nuts and seeds should form the backbone of your meals. When you're eating smaller portions, choosing foods that pack more nutrition into less volume matters more than it used to.

Stay well hydrated

Reduced appetite can sometimes mean you're also drinking less throughout the day without realising it. Staying well hydrated is one of the core nutrition goals worth keeping front of mind.

Eat regular, smaller meals

Rather than trying to push through one or two large meals, regular smaller meals tend to work better when appetite is reduced, and can help you spread your nutrient intake more evenly across the day.

Common Nutrition Challenges to Be Aware Of

A few things tend to come up for people on GLP-1 medication:

• Gastrointestinal side effects. Nausea, vomiting, constipation and diarrhoea are common and can make eating feel even harder some days.

• Nutrient gaps. With less food coming in, certain nutrients can become harder to get enough of, particularly vitamin D, calcium and vitamin B12. If you're considering a supplement to cover a gap, it's worth speaking with your doctor or dietitian first rather than guessing.

• Muscle loss risk. Weight loss on GLP-1 medication can include a loss of lean muscle if protein intake isn't managed carefully alongside it.

None of this means something has gone wrong. It's simply what tends to happen when appetite drops, and it's manageable with a bit of planning.

Where Glow Shakes Can Fit In

On days when a full meal feels like too much, but you still need to get protein and nutrients in, a shake can be a practical option. The Collagen Co Glow Shakes provide 29g of protein per serve along with 24 essential vitamins and minerals, which can help support your nutrient intake when regular meals are harder to manage.

Glow Shakes aren't a replacement for food or for your medication. They're simply one convenient way to help meet your nutritional needs on the days that call for it.

Key Takeaways

• GLP-1 medications reduce appetite by mimicking a natural fullness hormone, but they work best alongside good nutrition, not instead of it.

• Protein becomes a priority, aim for 1.2 to 1.6g per kilogram of body weight per day.

• Build meals around nutrient-dense whole foods and stay on top of hydration.

• Smaller, more frequent meals are often easier to manage than large ones.

• Speak with your doctor or dietitian before starting any supplement to address a nutrient gap.

• A shake like Glow Shakes can help on days when a full meal isn't realistic.