In intermittent fasting, where the timing of meals is meticulously planned, even the smallest nutritional components can raise eyebrows.
One such component that has gained attention is collagen.
The question on many fasting enthusiasts’ minds is, “Does collagen break a fast?”
Let’s delve into this topic to understand its impact on fasting better.
Fasting & Collagen Explained
Fasting is popular for weight loss, improved health, and longevity.
There are many different types of fasting, but they all involve abstaining from food and drink for some time.
Collagen is a protein found in skin, bones, muscles, and other connective tissues.
It is important for many bodily functions, including wound healing, cell repair, and joint health.
Collagen is a popular supplement, but many wonder whether it can be taken during a fast.

You can learn more about intermittent fasting in our Intermittent Fasting 101: A Simple Guide for Lasting Results.
Does Collagen Break a Fast?
Technically speaking, yes, collagen does break a fast. This is because collagen is a protein, and proteins contain calories.
However, collagen is low in calories, so it is often allowed during fasting plans.
A typical serving of collagen powder has around 30 calories.
Are you curious at what age you should start taking collagen? Check out our post – What Age Should You Start Taking Collagen?
Benefits of Taking Collagen During a Fast
There are several potential benefits to taking collagen during a fast. These include:
- Satiety: Collagen can help you feel fuller for longer, which can help you stick to your fast.
- Preserved muscle mass: Collagen can help protect muscle mass which helps maintain strength and support metabolism.
- Joint health: Collagen can help to improve joint health and reduce joint pain.
- Skin health: Collagen can help to improve skin health by increasing elasticity and reducing wrinkles.
How to Take Collagen During a Fast
Opt for a low-calorie, unflavored, and unsweetened version if you take collagen during a fast.
Mix collagen powder into coffee, tea, or water. It also works well in smoothies or soups.
Start with a small dose of collagen to see how your body tolerates it.
Collagen may cause gastrointestinal discomfort in some individuals.

Learn more about creatine and fasting in our post – Does Creatine Break A Fast? Debunking The Myths.
Recommended Collagen Products
- Vital Proteins Collagen Peptides Powder
- Orgain Hydrolyzed Collagen Powder
- Ancient Nutrition Collagen Powder Protein with Probiotics
Takeaways: Does Collagen Break a Fast?
Whether or not to take collagen during a fast is a personal decision.
Some prefer to avoid all calories during their fast, while others are more lenient.
If you take collagen during a fast, start with a small dose to see how your body responds.
Also, choose a low-calorie, unflavored, and unsweetened variety.
As always, talk to your healthcare provider before adding collagen, or any dietary supplement, to your wellness routine.
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Kathryn is a Registered Dietitian and a National Board Certified Health and Wellness Coach. She is also certified through the Academy of Nutrition and Dietetics in Weight Management. She has 20+ years of nutrition experience working in a variety of healthcare settings. Her passion is to provide evidence-based nutrition information that supports vitality and longevity!
