Can I Drink Collagen During Intermittent Fasting?

can i drink collagen when intermittent fasting

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Intermittent fasting (IF) is a popular health and fitness trend for good reason! In general, intermittent fasting (IF) focuses on when you eat, not what you eat. You can drink collagen during intermittent fasting--however, this article will explain the trade-offs.

The theory on intermittent fasting is straightforward--humans weren't made to eat all day long, reducing calories through fasting will naturally lead to weight loss.

Not only that, but since the body isn't working so hard to digest and process food and sugar, it can refocus its energy to balance and healing.

Furthermore, IF helps control your blood sugar. When your blood sugar levels are steady, your body will be a fat burning machine.

In fact, it will look to use fat within your body for its energy source. 

There are other diets out there that you may have heard of, like the ketogenic diet and paleo diet. They strive to do something similar--eat more protein since it helps keep blood sugar steady and helps you feel full, limit the number of carbohydrates and consume healthy fats like omega 3 fatty acids.

Let's get started and answer if drinking collagen during intermittent fasting is a good decision for you!

How Do You Intermittent Fast?

One thing that's attractive about intermittent fasting is there is no one way to do it. You can adopt an approach that works for you and your body. 

Your take on intermittent fasting will answer if you can have collagen during intermittent fasting.

First, let's take a look at a general definition of 'fast' at

  1. to abstain from all food.
  2. to eat only sparingly or of certain kinds of food, especially as a religious observance.

The first definition means no calories at all during fasting time. Number 2 gives leeway for some calories.

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Here's the deal:

While practicing intermittent fasting, you're attempting to keep your blood sugar low and steady--no or very little spikes.

With this in mind, taking in any calories will spike your blood sugar and so will the types of foods or supplements you're eating or drinking.

Taking a hydrolyzed collagen dietary supplement while in the fasting window will add a small number of calories that will not only break the fast but could also increase blood sugar levels.

However, a collagen supplement is normally very low in calories so the spike could be minimal (a glucose monitor is excellent to determine how collagen or bone broth affects your personal insulin sensitivity).

So, can you drink collagen during intermittent fasting? The answer is maybe and depends on if you adopt the first definition of 'fast' or the second. 

Intermittent Fasting Plans

As we mentioned, there are different approaches to intermittent fasting that you can adopt. 

You'll have to see how your body reacts to any of them. Either way, realize it will take an adjustment period to adapt to intermittent fasting.

That's where collagen pills or powder protein can help take off the edge of hunger, possibly not spike your blood sugar too much and help you stay steady on the IF plan you're following.

Here are a couple of the most popular intermittent fasting plans:

5:2 Intermittent Fasting Plan

If you're following The 5:2 Diet, the plan allows for five days of healthy eating and two days of consuming only 500-600 calories each day.

When you're in the two days of consuming a very low number of calories, collagen supplementation can be your best friend!

Actually, you can add collagen powder to your coffee and even some MCT oil, a coconut oil, (check out Bulletproof coffee) and add omega 3 fatty acids which your body loves. (Or add a high-quality collagen creamer to your coffee.)

A hydrolyzed collagen powder supplement is generally low in calories, provides protein to help avoid hunger pains and adds amino acids that can help boost collagen production.

Comforting and satisfying bone broth is another way to consume fewer calories and gain valuable amino acids and collagen to keep your body and your fast humming along.

16:8 and Other Fasting Plans

Other intermittent fasting plans like 16:8 (16-hour fast each day, eg. eat between noon and 8 pm), stop-eat-stop (fast for 24 hours once or twice a week, eat responsibly the other days) and Circadian Rhythm Fasting Approach (only eat when the sun is up).

Clearly, all of these IF plans require zero calories during the fast period.

With this in mind, because there are calories in most collagen powder supplements, these IF approaches would not allow for drinking collagen during the fasting period. (Although you can always choose to modify these zero-calorie fasting plans and allow for some calories.)

can I take collagen or bone broth intermittent fasting

Collagen Peptides and Intermittent Fasting

To sum this all up, if you're going to be a strict intermittent faster, then drinking collagen powder or bone broth wouldn't be allowed--it would break your fast.

If you're going to allow for some calories during your intermittent fasting cycle, then drinking collagen peptides would be a good idea to get extra protein and hold off hunger pangs.

Either way, a glucose monitor will help you determine if taking collagen raises your blood sugar and by how much.

Other Benefits of Drinking Collagen while Intermittent Fasting

As we mentioned above, there are other benefits to drinking collagen powder during intermittent fasting.

You may gain additional benefits like:

  • Thicker, fuller hair (even new hair growth!)
  • Stronger nails
  • Smoother (fewer deep wrinkles) and more hydrated skin
  • Less achy joints
  • Larger muscles and stronger bones
  • Strong connective tissue like in your joints and pelvic floor as examples
  • Healthier gut

As you can see, not only can collagen help you lose weight through intermittent fasting, but it can also be a 'fountain of youth' to enhance your beauty and body.

What About Drinking Bone Broth While Intermittent Fasting?

Bone broth is a comforting, filling drink that has a lot of beneficial amino acids (the building blocks of the collagen protein chain) and some collagen protein.

Nevertheless, bone broth has calories--somewhere around 70-100 calories per serving.

In fact, Dr. Kellyann is known for her popular bone broth fast and bone broth diet, so you might want to check it out here.

In short, this is an easy question to answer, it's the same answer as 'can I drink collagen during intermittent fasting' above.

If you don't take any calories in during your fast, then bone broth is off the list.

However, if you follow a plan that does allow for some calories, a quality bone broth (whether you make it on your own, buy bone broth powder or ready-made bone broth) can help you keep on track.

We have reviewed the best bone broth to buy today, so check that article too.

Is Intermittent Fasting Safe for Women?

Dr. Kellyann and others say intermittent fasting is generally safe.

However, there could be downsides to intermittent fasting such as low-quality sleep, an increase in cortisol and emotional guilt over breaking a fast.

Although many people adjust well to IF, some women experience the jitters, changes in menstrual cycles, weakness and mood swings by going without food for a long period of time. 

Women who have trouble conceiving or are trying to conceive, pregnant or breastfeeding or diabetic should not consider doing IF. 

This is when adding a clean collagen peptide supplement or bone broth may help alleviate those types of side effects of IF and keep you on track.

As always, we highly recommend you consult with your healthcare professional before starting any intermittent fasting plan or supplement.


What's an easy way to experience weight loss and then maintain the weight loss over time? Or improve the overall functioning of your body?  One way many have adopted is intermittent fasting (IF).

Not only does IF help with your weight loss and management goals, but there are also strong indications that intermittent fasting can improve overall health, prevent debilitating diseases and even extend your life. 

Some intermittent fasting plans allow for calories on fasting days, others don't allow any calories. It's up to you on how which plan works best for your lifestyle and body and how strict you want to be overall.

For example, even if an intermittent fasting plan calls for zero calories during fasting, you may choose to allow some calories. Obviously, your results may differ, but every body and each situation is different.

If your IF plan allows for some calories, drinking collagen or bone broth would be helpful to get through the fasting period and lessen some side effects like feeling lightheaded or jittery.

If your plan or intention is zero calories during the fasting period, then neither the collagen nor bone broth would be allowed.