When The Peptide Stops Working...

Happy Monday!

Lately, I've been hearing the same complaint over and over.

"My GLP-1 stopped working."

"I've plateaued."

"The shot isn't doing what it used to."

And almost every single time, I ask the same question.

Are you exercising? Are you lifting weights? Are you doing cardio?

The answer is almost always no. Or some version of "I walk my dog sometimes."

If you're on a GLP-1 and you're not doing both cardio and resistance training, you are leaving most of the benefit on the table. And when you plateau, the drug isn't the problem. You are.

Interesting Study

There's a Danish trial from a few years back that should be required reading for anyone touching these medications.

Sandsdal and colleagues took 195 adults with obesity and put them on a low-calorie diet for eight weeks. They lost about 13 kg.

Then the real experiment started.

The researchers split them into four groups for one year.

The combination group blew everyone else away. They lost more fat. They kept more lean mass. Their abdominal fat dropped 6.1 percentage points more than placebo. Exercise alone got 2.6. Liraglutide alone got 2.8.

Combine them, and you more than DOUBLE the effect of either intervention by itself.

It Gets Better

A secondary analysis looked at bone density. This one matters.

GLP-1 alone reduced bone density at the hip and spine. That's the real cost of losing weight without resistance training. Exercise plus GLP-1 preserved bone mass completely. Same weight loss. No bone cost.

Now think about that for a second. If you're losing weight on a GLP-1 and you're not exercising, you might be quietly losing bone. You won't feel it now. You'll feel it in your 60s when you fracture a hip stepping off a curb.

The Lean Mass Problem

Real-world data on hundreds of thousands of GLP-1 users shows the same pattern.

The more weight you lose, the more lean mass you lose.

Each 1mg dose increase in semaglutide is associated with an additional 1.9% drop in lean body mass.

The reason most people plateau on a GLP-1 is that they've quietly traded fat for muscle over the first six months.

Their metabolic rate is now lower than when they started. The same dose that worked great in month two does nothing in month eight.

The Hormone Piece

But what if you lift four days a week, walk every morning, eat your protein, and still plateau on a GLP-1?

Why?

Oftentimes, it’s because your hormones are in the gutter.

Low testosterone means you can't build or hold muscle, no matter how hard you train.

Low thyroid output tanks your metabolic rate independent of everything else.

Low progesterone trashes your sleep, which trashes your recovery, which trashes your training.

I see this constantly.

A guy comes to me frustrated that he's plateaued on tirzepatide. We pull labs. His total testosterone is 320. His free T is in the basement. His thyroid is borderline hypo. He's been training hard for six months and getting nowhere.

Of course he plateaued. His body chemistry is fighting him.

The GLP-1 creates a calorie deficit.

Exercise gives your body the signal to keep muscle.

But hormones are the permission slip.

Without them at optimal levels, your body can't execute on either signal.

This is why the people getting the best results on these medications are usually working with someone who is also managing their HRT. The two work together. Neither works as well alone.

What to Do

If you're on a GLP-1, this is the order of operations.

First, resistance training. Three days a week minimum. This is non-negotiable. It tells your body to keep the muscle while you lose the fat.

Second, cardio. 150 minutes a week of zone 2 minimum (I do at least 250+ minutes of zone 2 cardio every week). Walking briskly, cycling, swimming, whatever you'll actually do. This is what drove the results in the Danish trial.

Third, protein. At least 1 gram per pound of goal bodyweight per day. You're eating less. You have to make every calorie count.

Fourth, get your hormones checked. Testosterone, estradiol, progesterone, free and total T3 and T4, TSH, reverse T3. If anything is suboptimal, fix it. The peptide will work better. The training will work better. Everything works better.

Final Thoughts

The number of people I see using GLP-1s as a substitute for work is staggering.

They want the shot to do all the lifting while they sit on the couch and eat half their usual meal.

The people getting the best results on these medications are the ones who treat the peptide like a tool, not a savior.

They lift. They walk. They eat protein. They optimize their hormones. They sleep. The GLP-1 makes it easier to sustain the calorie deficit.

Everything else is what actually reshapes the body.

If you've plateaued, before you blame the drug, ask yourself honestly.

Are you lifting? Are you walking? Are you eating protein? Are your hormones dialed in? If the answer to any of those is no, you have found your problem.

I hope you have a fantastic week!

Best,

Hunter Williams

Further Reading

One More Thing

My friend Drayke is putting on the Austin Immortality Conference on May 30 in Austin, Texas. One day, all about peptides, regenerative medicine, hormones, and metabolic optimization.

The lineup is legit and includes some of my favorite industry leaders.

I wanted to be there. Unfortunately, I'm speaking at a private seminar in Mexico that weekend, so I can't make it. But if you're near Austin and you're serious about this space, you should go.

Use code HUNTER at checkout for 15% off any ticket, or $100 off a VIP ticket.

Details and registration here: https://www.austinimmortalityconference.com/