When to Take Collagen When Intermittent Fasting: A Comprehensive Guide

When to Take Collagen When Intermittent Fasting: A Comprehensive Guide

Intermittent fasting is a popular dieting method that requires you to cycle between periods of eating and fasting. Many people choose to take collagen supplements as part of their intermittent fasting plan, but when is the best time to take collagen when intermittent fasting? In this comprehensive guide, we’ll explore the answer to this question, helping you to get the most out of your intermittent fasting routine.

Can Collagen Break a Fast?

The question of whether collagen can break a fast is an important one. Technically, any food, drink, or supplement that has even a single calorie is enough to break a fast, so collagen would, too. However, most people who practice intermittent fasting don’t follow a strict fasting regimen and allow themselves to consume small amounts of low-calorie foods, drinks, and supplements. In these cases, collagen can be consumed without breaking the fast.

When to Take 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 does break a fast. For this reason, it’s best to wait until after your fasting period is finished before taking any collagen supplements. This will ensure that you maintain the benefits of true fasting.

There may arguably be some therapeutic perks to taking collagen in a fasted state, however I typically recommend keeping it during the eating window. Studies have shown that one serving of collagen peptides has minimal impact on ketone production, which means that if your fasting focus is keeping your ketone levels high, then you can get away with taking collagen while fasting.


Ultimately, the decision of when to take collagen when intermittent fasting comes down to your personal preferences and goals. If you follow a strict fasting regimen that focuses on calorie intake, taking collagen supplements will break your fast. This is because even though collagen is low in calories, it still contains some, and any food or drink that has any calories can break a fast. However, if you’re following a more relaxed approach to intermittent fasting, it may be ok to take collagen during your fasting window.

By following these guidelines, you can make sure you’re taking collagen at the right time for your intermittent fasting regimen. With the right timing, collagen can be a great addition to your intermittent fasting routine, helping you to reach your health and fitness goals faster.

Is it possible to consume collagen while following an intermittent fasting plan?

Research suggests that intermittent fasting for fat loss and metabolic flexibility can be beneficial without consuming collagen peptides. While collagen peptides may have a limited effect on ketone production, fasting can still be effective for fat loss and metabolic flexibility without consuming collagen peptides.

What is the best time to take collagen for optimal results?

It is usually suggested to take a supplement in the morning before eating breakfast. This is because it is best taken on an empty stomach for optimal absorption.

Is it advisable to take collagen with no food in your stomach?

Many people follow the practice of taking collagen on an empty stomach in order to maximize digestion of the protein, as it requires stomach acid to do so. However, it is not necessary to take collagen on an empty stomach in order to receive its benefits.

Should I consume collagen prior to or after eating breakfast?

Acid is necessary for the digestion of food, however collagen is not affected by the acid in the stomach, meaning it does not matter if collagen is taken on a full or empty stomach.

Will consuming collagen products prevent you from entering a state of ketosis?

Collagen peptides won’t impact your ketosis state, but taking them alongside a ketogenic diet can be extremely beneficial, even more so than other supplements (except for electrolytes).

when to take collagen when intermittent fasting a comprehensive guide 17 04 2023 1

when to take collagen when intermittent fasting a comprehensive guide 17 04 2023 2

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