How Much Protein Do You Need While Taking A GLP-1?

TTG Staff
7 hours ago
6 min read

Part 5 of The Training Ground Guide to GLP-1 Weight Loss Medications

Woman in black tank top plating a healthy meal in a modern kitchen, with gym equipment visible in the background.

If there is one nutrition conversation we have more than any other with clients taking Ozempic, Wegovy, Mounjaro, or other GLP-1 medications, it's this.

Everyone says:

"I'm just not hungry."

At first, that sounds like a good thing.

For many people, reduced appetite is one of the primary reasons these medications are effective.

Less hunger often means:

Less snacking
Smaller portions
Reduced calorie intake
Easier weight loss

But there's a potential downside.

When food intake drops dramatically, protein intake often drops with it.

And that's where problems can begin.

Because while losing body fat may be the goal, losing muscle generally isn't.

Why Protein Matters More During Weight Loss

Many people think of protein as something only bodybuilders care about.

The reality is very different.

Protein plays an important role in:

Maintaining muscle mass
Recovery from exercise
Immune function
Tissue repair
Satiety
Healthy ageing

And during periods of weight loss, protein becomes even more important.

Why?

Because your body is operating with less energy coming in.

That increases the importance of preserving the muscle you already have.

The Problem With GLP-1 Medications

The medication is doing exactly what it's designed to do.

You're eating less.

The challenge is that your body doesn't automatically know the difference between:

Reducing excess calories
Reducing essential nutrients

When appetite falls significantly, people often start eating:

Smaller meals
Less frequently
Less total food

And unless protein is being prioritised, intake can drop quickly.

This is one of the most common patterns we see.

The scales are moving.

Weight is falling.

But protein intake has quietly become inadequate.

The Question We Ask Every Client

When someone tells us:

"I've lost 8kg."

Our next question is often:

"How much protein are you eating?"

Not because we're trying to make nutrition complicated.

Because the answer helps us understand whether muscle preservation is likely being supported.

Weight loss and healthy weight loss are not always the same thing.

How Much Protein Do You Actually Need While Taking a GLP-1?

For Australian adults aged 19-70, the Recommended Dietary Intake for protein is approximately:

0.75 g per kilogram of body weight for women

0.84 g per kilogram of body weight for men

These recommendations are designed to meet the basic needs of most healthy adults.

They are not specific targets for someone who is:

Losing weight
Strength training
Trying to preserve muscle
Managing significant appetite suppression
Taking a GLP-1 medication

Current guidance suggests that people actively losing weight while taking a GLP-1 medication may benefit from approximately:

1.2–1.6 g of protein per kilogram per day

For someone who is resistance training and making muscle preservation a priority, aiming towards the upper end of this range, around 1.6 g/kg/day, is a strong starting point.

Sports nutrition research sometimes recommends intakes of up to 2.2 g/kg/day, particularly for well-trained individuals or athletes losing weight under demanding conditions.

That does not mean everyone taking a GLP-1 medication needs that much.

However, a higher target may be appropriate depending on the individual’s training, body composition and overall energy intake.

There is also an important qualification.

For someone carrying significant excess body weight, calculating protein based on total current body weight may yield an unnecessarily high target.

In these cases, goal weight, reference weight, adjusted body weight or an individualised daily target may be more appropriate.

As a practical guide, many people may fall somewhere around:

80–120 g of protein per day

However, the right amount depends on:

Body size and composition
Age
Training demands
Rate of weight loss
Total food intake
Medical history
Kidney function
How well food is being tolerated

The exact target will vary from person to person.

But the broader message is clear:

During GLP-1-assisted weight loss, protein intake should be deliberately planned rather than left to appetite alone.

Why Protein Matters Even More On A GLP-1

Imagine two people.

Both lose 15kg.

One maintains most of their muscle.

The other loses a substantial amount.

Who is likely to have the better long-term outcome?

In most cases, the person who preserved more muscle.

Protein is one of the key tools we have available to support that process.

Combined with resistance training, it helps provide the body with both:

The building blocks
The reason

to keep muscle around.

The Appetite Challenge

This is where theory meets reality.

Many people taking GLP-1 medications know they should eat more protein.

The issue is that they simply aren't hungry.

They tell us things like:

"I forget to eat."
"I feel full after a few bites."
"I can't finish my meals anymore."

That's understandable.

The medication is working.

But it means protein often requires more intentional planning than it did previously.

Practical Ways To Increase Protein Intake

When appetite is low, protein quality becomes increasingly important.

Rather than focusing solely on eating more food, it can help to focus on choosing protein-rich foods first.

Examples include:

Greek yoghurt
Eggs
Chicken
Fish
Lean red meat
Cottage cheese
Protein smoothies
Protein powders
Tofu
Tempeh

Many clients find it easier to prioritise protein early in the day rather than trying to catch up later.

Because once appetite disappears, catching up can become difficult.

What About Protein Shakes?

This is one area where convenience can be incredibly useful.

Protein shakes aren't mandatory.

They aren't magic.

But they can be practical.

For someone struggling to consume enough protein through food alone, a shake may provide a simple way to support intake without requiring a large meal.

Sometimes practicality matters more than perfection.

What We Monitor At The Training Ground

When working with clients taking GLP-1 medications, we don't just monitor body weight.

We also pay attention to:

Protein intake
Muscle mass
Strength
Body composition trends
Training performance

Why?

Because those metrics help us identify whether the weight loss process is moving in the right direction.

The scales tell us weight is changing.

The other measurements help us understand how.

The Most Common Mistake

The most common mistake isn't taking too little medication.

It's assuming weight loss automatically means success.

Someone can lose weight while:

Losing muscle
Becoming weaker
Reducing physical capacity

That's not the outcome we're chasing.

The goal is to lose body fat while preserving as much muscle, strength, and function as possible.

Protein plays a major role in helping achieve that.

What We Tell Members At The Training Ground

If you're taking a GLP-1 medication, don't just ask:

"How much weight have I lost?"

Ask:

"Am I eating enough protein to support the body I'm trying to build?"

Because eventually, the medication is only part of the story.

The habits you build along the way are what determine long-term success.

And protein is one of the habits worth paying attention to.

The Bottom Line

If you're taking Ozempic, Wegovy, Mounjaro, or another GLP-1 medication, protein should become a priority.

Not because protein magically burns fat.

Not because protein is trendy.

Because protein helps support:

Muscle retention
Recovery
Strength
Physical function
Long-term health

While exact requirements vary, most active individuals trying to preserve muscle during weight loss will likely benefit from protein intake above the minimum recommended daily intake.

The scales can tell you how much weight you've lost.

Protein helps influence what that weight is made of.

And when it comes to long-term success, that's a distinction worth paying attention to.