When I started using GLP-1 medication, protein shakes were completely new to me. I’d only had a fruit smoothie a handful of times before.  About two weeks into my weight-loss journey, I needed a way to add more protein without adding more calories. As I searched the internet for ideas, I kept coming across protein shakes.

It surprised me to see them discussed in relation to weight loss.  Weren’t they for bodybuilders and athletes who needed to recharge after a hard workout?  Were they really something I needed or could use?

It turns out there’s an entire branch of the diet industry dedicated to protein shakes.  So, I dipped my toe into the protein pond and bought what was supposedly the number one plant-based protein powder on the market.

At first, it was okay.  I wasn’t thrilled, but I had read that protein powders were an acquired taste.  I decided to give it a chance.  I quickly became disillusioned with the entire protein shake idea, as with each drink they became more difficult to swallow.  The powder was so sweet and cloying that it overpowered anything I added to the drink to the point it was sickening. 

Even with such a poor experience, I didn’t give up and tried a whey protein powder, which tasted much better.  I continued to research and learned about whey isolate.  It has a higher protein content than whey concentrate and a lower calorie count too. 

It’s with whey isolate’s discovery that I dove in and didn’t look back.  I was all about a lunchtime smoothie because it let me add more than just protein. With fruit and spinach, it became an easy way to work extra nutrients into my day.

They tasted like fruit juice or candy, instead of the traditional creamy flavored vanilla and chocolate.  I was drinking one almost every day after working out. 

Protein shakes became a lifeline for me as I tried to pack 150g of protein into every day.  For a while I managed to do so—or at least get very close.  In the process, I gradually started replacing foods like bread, fruit, and vegetables with protein.  But I hit my protein goals and the numbers on the scale were moving.  My calories stayed low, and for the first time in my life, I was consistently losing weight.  It felt like I’d cracked the weight loss code.  Why wouldn’t I keep doing it?  Things were going great!

When Good Nutrition Started Working Against Me

And then one day I was running late, and I quickly drank a clear whey protein shake.  Within moments my right side hurt, and I knew immediately it was my gallbladder.  I had been having pain there now and then and had been diagnosed with gallstones, but it was at most a mild issue.  That afternoon my gallbladder issued a warning: it wasn’t happy with what I was doing.  I took some Tylenol hoping for the best and drank some water.  I continued to sip water, and that seemed to help, so I drank more, and the pain dissipated.  

I was a little leery when I ate again, but I was fine, so I wrote it off as dehydration, as I had been working in the sun all day and made a mental note to drink more water.   The following day I had my usual protein and fruit shake for lunch with no problem.  But then I had another clear whey protein drink, and once again I had the same problem.  Only this time the pain stuck around.  It wasn’t horrible, but it was uncomfortable. 

I reached out to a nurse on call and was told if I was in pain to go to the ER.  Which is good advice for someone in the throes of a gallstone attack, but I wasn’t there yet. 

So, like many people, my next stop was Google, and I did a deep dive into researching the gallbladder.  I found information suggesting dehydration can contribute to gallbladder problems and that rapid weight loss is a known risk factor.  I also found references to very high-protein diets and their potential impact on the gallbladder. Add in the fact that I already had gallstones, and I figured I had several likely culprits.  Of course, without a doctor’s diagnosis I couldn’t be sure, but I adjusted my diet to see what would happen.

First, I drank water like crazy.  I immediately felt better.  I also eliminated protein shakes from my diet.  Which was a problem because I was still trying to reach 150g of protein every day.  I found it nearly impossible to do.  My calories consistently surpassed my daily goal, and I stopped losing weight.   Which was frustrating. I had to choose between hitting my protein goal and staying within my calorie count for the day. It was a no win situation.

Finding the Right Balance

I eventually had a chat with my weight loss doctor, and she recommended I aim for 120g of protein.   That helped, but my calorie count was still too high, and my weight loss slowed down significantly. 

You’ll think I’m a glutton for punishment, but since I was feeling better, I added my lunchtime high-protein fruit smoothie back into my diet.  As it went well, I added a clear whey protein drink for an afternoon snack.   What happened?  I was fine – mostly.  As long as I stayed hydrated, my gallbladder didn’t flare up.  I found that to be the key.  Drinking water. 

In hindsight, my diet wasn’t the healthiest when I was trying to reach 150g of protein a day.  But my nutritionist had recommended it at the time.  Obviously my body couldn’t handle it long-term.  I also wasn’t drinking enough water.  Hydration is something you hear is important with GLP-1 medication, but I hadn’t made it a priority.  I do now.

Would I Still Recommend Protein Shakes?

So am I the hardcore advocate for protein shakes that I once was?  No, probably not.  While they serve their purpose, protein shakes can’t be the go-to solution to meet your protein and weight loss goals.  They are, however, too useful to completely discard.  I drink one high-protein fruit smoothie a day for lunch, and I have limited additional protein shakes to one a day—if necessary.  On the days I work out, I drink a clear whey shake to recharge.  I also make sure I’ve had plenty of water.   

Protein shakes had become a way of life for me.  Now they supplement my diet—not dominate it.  Yes, my weight loss has slowed down, but it’s the price I am willing to pay to avoid aggravating my gallbladder.

Do I suggest you give protein shakes a try?  Sure, if you’re just starting GLP-1 medication, I would consider them. They can be helpful for meeting protein goals.  Just don’t make the same mistake I did and let them become the foundation of your diet.  Used in moderation, they’re a great tool.  Used as a substitute for real food, protein shakes can create problems of their own.

Recommended Reading

• Protein Fruit Shake Recipe – Learn how I make my everyday high-protein lunch smoothie.
• How Much Protein Do You Need on GLP-1 Medication? – Find out how much protein most GLP-1 users should aim for and why your needs may change over time.
• The Basics in Nutrition from a GLP-1 User – Learn how protein, fiber, hydration, and balanced nutrition work together.