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Do Vitamins Break a Fast? [Intermittent Fasting Tips]

Updated: Jan 19, 2022

If you're new to Intermittent Fasting, you've probably noticed how deceivingly simple it appears. You just don't eat for a little while... right?

But then you're brushing your teeth one night and get a jump - does THIS break a fast?! What about the little bit of lemon you added to your water? Or the Keto Coffee that you're using?!

do vitamins break a fast

Probably one of the more confusing factors comes down to vitamins and supplements. It becomes even more tricky when you notice that some supplements and vitamins NEED to be taken with food while others need to be taken fasted. Are these fasted supplements breaking your fast and ruining your results?

Today, I'm breaking down the deets of whether or not supplements and vitamins are breaking your fast.

Do Vitamins Break a Fast?

If we're talking about vitamins in their pure form, such as vitamin C and vitamin D - these do not contain any carbohydrates or protein that can cause the release of insulin and break your fast. The same is true for minerals such as Celtic Sea Salt.

However, if we're talking about supplements such as collagen or protein powder - these not only contain protein that can cause a small insulin release, they often also contain some type of sweetener. The protein and the sweetener both WILL break your fast. That means stirring in collagen to your Keto Coffee is a no-no. (At least during your fasted state.)

Pssst - wondering what type of fasting is best for your goals? Click below for my free Intermittent Fasting Schedule quiz to find out!

It Also Depends On This...

What's your goal with Intermittent Fasting? Are you using fasting for religious purposes or are you on a specific water fasting protocol? If so, then it's possible that ANY food, supplement or drink consumption will break your fast.

But if you're looking to tap into fat burning mechanisms, the goal is to reduce the insulin levels. As we've discussed, insulin is your storing hormone. So while this is high, your body effectively shuts OFF fat burning. That's why the main goal with the Complete Intermittent Fasting Bundle is to stabilize blood glucose levels, reduce insulin and tap into fat burning. This is why Keto Coffee is a great option for those who are new to Intermittent Fasting to utilize during their fasted period. This is also why most supplements, vitamins and minerals will not break your fast.

Get the step-by-step, easy to follow details on how to use Intermittent Fasting to achieve your weight loss and wellness goals with the Complete Intermittent Fasting Bundle!

Tap into fat burning mechanisms, eat DROOL WORTHY meals, stop hunger and finally feel GOOD again! Get started HERE!

Your Nutritionist,


do vitamins break a fast

Autumn Elle Nutrition

23,792 views7 comments


Dec 04, 2023

The question of whether vitamins break a fast during intermittent fasting is nuanced and varies depending on the type of vitamins and the nature of the fasting. Generally, water-soluble vitamins (like Vitamin C and most B vitamins) are unlikely to break a fast, as they don’t contain calories. However, fat-soluble vitamins (like Vitamins A, D, E, and K), especially if taken in oil-based forms, might have a minimal calorie content that could technically break a fast. For those practicing intermittent fasting, it's advisable to align vitamin intake with eating periods to avoid any ambiguity. Online pharmacy services like Pill Doctor offer a convenient way to access a wide range of vitamins and supplements, making it easier to select the appropriate…


This is the only article of yours that i wasn’t able to fully comprehend ~ probably my fault =:) “VitC or D in itz truest form will not break a fast” but what about the others in a quality/no added frills MULTI that contains everything from A D3 K B6 Biotin MSM Glucosamine Boron Zinc Magnesium Copper Potassium Selenium…all in a tablet form? Thank you

Replying to

As long as it doesn't also have sugar, it won't break a fast


Really enjoying your articles! If i wonder about a particular food etc breaking a fast, i search “Autumn Bates Does (blank) Break A Fast”… & therez my answer. THANK YOU

Replying to

You're very welcome! :)

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