The Pros and Cons of Using Collagen During Intermittent Fasting

Collagen Intermittent Fasting: Is It Possible?

Intermittent fasting has become a popular health trend in recent years, with many people praising its potential benefits. But can you still take advantage of intermittent fasting while consuming collagen? Read on to learn more about the role of collagen in intermittent fasting and how to pair the two safely.

Can You Have Collagen During Intermittent Fasting?

If you define fasting by the traditional sense, meaning, abstinence from food and/or drink for a certain amount of time, then yes, collagen technically breaks a fast. Collagen is a protein found in foods such as bone broth, and it contains calories and amino acids that can cause a slight spike in blood sugar levels.

Luckily, collagen fits even better into a keto diet than it does intermittent fasting. Ketosis is a process maintained by eliminating carbs from the diet, which also helps to balance blood sugar levels. Collagen will help you feel full and sustain you for the rest of the day. Since collagen is keto, you can still get to ketosis during the fast, and adding collagen to your meals can help to boost your energy levels.

Collagen During Intermittent Fasting: Pros and Cons

Can collagen break a fast? This depends upon the number of calories you allow yourself during the fasting window. Collagen intake during fasting can be beneficial in certain cases, as it helps to maintain muscle mass and provides your body with essential nutrients. It’s a great pairing if you are intermittent fasting and can help to regulate and induce autophagy.

With that said, there are many different types of collagen out there and not all of them are suitable for intermittent fasting. Collagen brands such as Vital Proteins and Ancient Nutrition contain higher amounts of calories, which can break your fast. Collagen in your morning coffee does not break a fast as it contains very few calories and does not cause a spike in blood sugar levels.

Intermittent fasting is all about timing, and you should avoid taking any supplements during your fasting window. There may arguably be some therapeutic perks to taking collagen in a fasted state, however I typically recommend keeping it during the eating window.

Can You Take Collagen Pills While Fasting?

No, it is not advised to take collagen pills while you are fasting. If you would like to consume collagen pills, take them during your eating window. Be sure to check with your doctor before taking any type of supplement, especially if you are pregnant or breastfeeding.


Collagen can be a great addition to your intermittent fasting plan, as long as you are aware of the pros and cons. Make sure to stick to low-calorie collagen products during your fasting window and take any pills during your eating window. If you have any questions or concerns, be sure to consult your doctor.

What is the best time to consume collagen while practicing periodic fasting?

Taking collagen in the morning before beginning a fast and at the break of the fast can be beneficial. Consuming collagen can help keep you feeling full and energized throughout the day. Additionally, as collagen is keto-friendly, you can stay in ketosis during the fast without feeling bloated.

Does going without food for a period of time have an impact on collagen?

Fasting caused a similar drop in the rate of collagen production by parietal bone, which produces mainly type I collagen, and cartilage, which mainly produces type I1 collagen, with the rate falling to 24% and 26% of the control rate respectively.

Will consuming collagen put you out of ketosis?

Collagen peptides won’t affect your ketogenic state, but incorporating them into your diet while following a keto lifestyle could be the most beneficial supplement to take, other than electrolytes.

Does collagen interfere with the process of autophagy?

Collagen supplements are an effective, pure, and dependable source of protein that can actually stimulate the creation of more collagen protein in the future! These supplements can be a great accompaniment to intermittent fasting and may help to regulate and trigger autophagy.

If you want to learn more about how to incorporate fasting into your diet, check out Fasting Books. They have a wide variety of resources and books on the topic.
      Shopping cart