Does Taking Vitamins Break a Fast?

It seems like fasting is one of the hottest topics in the health and fitness world today. If you've considered dieting before, I'm sure you've heard of this approach.

A lot of people swear by it, and it can be an effective strategy for reaching specific health and fitness goals.

However, if you're just getting started, you may have quite a few questions. For example, many of us wonder what foods and supplements are okay to have during a fasting window, and can I take vitamins while fasting. 

After all, you still want to get the essential nutrients your body needs whether you're fasting or not.

As you may have guessed, there aren't any foods you can have during a fasting window. Anything with calories will break your fast. Yes, that would also include protein supplements.

Does taking vitamins break a fast though? Truthfully, it depends on the vitamins!

We'll get into the nitty-gritty details later. First, let's start by taking a closer look at fasting.

What is Fasting?

Fasting is just a predetermined amount of time where you go without calories. While this can be for religious purposes, most people fast as a method to lose weight.

It can be effective for many people because they have less time to eat. Basically, this can be an easy way to lower your daily calorie intake.

If you know anything about losing weight, it's all a game of calories! If you consume more calories than you burn, you'll gain weight. If you consume fewer calories than you burn, you'll lose weight.

Obviously, there are quite a few other factors that go into effective weight loss. However, the most important component of weight loss is your calorie intake.

Fasting just happens to be an easy way to cut back on calories.

Believe it or not, there are even different strategies when it comes to fasting. The most popular by far is called intermittent fasting. Many people also pair intermittent fasting with training methods like fasted cardio to support their fitness and fat loss goals.

This is a method where people have a specific window they're allowed to eat in every day. For example, the 16/8 method and the 14/10 method are two popular approaches. But, what does that mean?

It means that you can't eat for 14-16 hours of the day and you can eat for 8-10 hours of the day. It all depends on how you choose to break it up and the timeframe that works best.

Now, even though it's popular, are there specific benefits to intermittent fasting?

What Breaks a Fast?

Anything with calories, sugar, or protein will break a fast by triggering an insulin response.

This includes protein supplements, sweetened drinks, and gummies with added sugars.

This includes protein supplements, sweetened drinks, and gummies with added sugars, especially when comparing approaches like fasting vs a detox or cleanse 

This is why many people ask, does taking supplements break your fast—because many supplements contain hidden calories or ingredients that can disrupt a fast.

Tea, black coffee, and water without additives are generally safe during a fasting window.

What Are The Benefits of Intermittent Fasting?

You’ll hear a lot of different things about intermittent fasting…

Some will say intermittent fasting is the greatest thing since sliced bread. Others will say that it’s a gimmick.

So, who's right? Is intermittent fasting a joke or can it actually offer benefits over other dieting strategies?

Well, some people claim that intermittent fasting can help with long-term health, disease prevention, and weight loss. Ultimately though, it's been determined that more research needs to be done on the subject (1).

Yes, it's true that intermittent fasting can be effective (2). Whether intermittent fasting is more beneficial than any other diet is up for debate.

Personally, I think it's all up to personal preference. Some people really enjoy intermittent fasting and it helps them stay consistent. Other people don't do well with intermittent fasting and it can cause them to fall off track.

My point is ... Do what works best for you.

Does Taking Vitamins Break A Fast? 

Let's get back to your original question, "does taking vitamins break a fast?" It depends.

If the vitamins don't have sugar, amino acids, or anything with caloric value ... Then your vitamins likely will NOT break your fast.

If we're talking about multivitamin supplements, this may be very hard to come by. This is also why people commonly ask, do supplements break a fast, since many contain added ingredients. If we're talking about individual vitamins, I'd think you're more likely to be safe. At the end of the day, it will come down to the individual product and its ingredients.

With all that being said, I always recommend that you take your vitamins with a meal and water. I say this because vitamins are either water or fat-soluble. That just means you need either water or fat to break down and absorb the vitamins.

Water-Soluble vs. Fat-Soluble Vitamins

Water-soluble vitamins (like B-complex and Vitamin C) dissolve in water and may not break a fast, but they can still cause discomfort on an empty stomach.

Fat-soluble vitamins (like Vitamins A, D, E, and K) require dietary fat for proper absorption and are best taken with meals.

This is why even if you're asking, can I take vitamins while fasting, it's usually more effective to take them with food.

So, does taking vitamins break a fast? It depends, but it's also a goofy question. It's goofy because you shouldn't even be taking vitamins when you're fasted! That's just a way to ensure you don't get the most out of them.

If you plan on fasting, there are a lot of things you should avoid during a fasting window. So, what else can break your fast?

If you are fasting, or plan on fasting, are there other things that can break your fast?

When Should You Take Vitamins While Fasting?

For best results, take your vitamins during your eating window with food and water.

This helps improve absorption and reduces the risk of nausea or stomach discomfort.

Even if certain supplements don't technically break a fast, taking them with meals ensures your body can use them effectively.

Things That Do Break A Fast

So, what kind of things do break a fast? I know I mentioned anything with calories, but what does that include? Close to everything.

The real question should be: What won't break your fast?

Tea, coffee, and water are close to your only options. Plus, when I say tea and coffee, I mean plain tea and coffee.

Anything with calories will break your fast, including many supplements depending on their ingredients, which is why timing matters when deciding when to take BCAAs 

That's why calorie-free drinks are just about the only things you can have during a fast.

Unless there is some new calorie-free food I've never heard of, you'd be best sticking with water in my opinion. It would be the best way to avoid any potential issues.

Side Effects of Taking Vitamins While Fasting

Taking vitamins on an empty stomach can lead to nausea, stomach discomfort, and poor absorption.

This is especially common with minerals like zinc and magnesium.

If you experience discomfort, it's best to take your supplements with food instead.

Finding the Best Vitamins For Fasting

No, I wouldn't recommend that you take your vitamins during a fast. Even if the vitamins we're talking about won't break your fast, you still shouldn't.

Like I said before, it's best to take vitamins with a meal to properly absorb the different fat and water-soluble vitamins and minerals. For that reason, it doesn't even really matter if vitamins break a fast or not.

For the best results, I would just recommend finding a high-quality vitamin.

At 1st Phorm, our mission is to help real people earn real and long-term results. We know you don't take shortcuts when it comes to the work you put in to reach your goals. That's why we don't take shortcuts with the supplements to help you reach them.

Our vitamin and multivitamin supplements are no exception to this commitment!

For the guys, we have M-Factor Men. For the gals, we have M-Factor Goddess. Heck, we even have Micro Factor which is a complete daily nutrient supplement.

With Micro Fator, you don't just get a multivitamin. You'll also get a probiotic, digestive enzymes, essential fatty acids, fruit & veggies, antioxidants, and CoQ10. Yes, that all comes in one, convenient daily packet!

Micro Factor is also available as a flavored powder you can mix directly with water! Ready to try the most complete daily nutrient supplement on the market? Get your daily nutrients in one convenient pack with Micro Factor!

If you have any questions in the meantime, don't hesitate to reach out.

We have a full team of NASM Certified Personal Trainers and Nutrition Coaches right here in St. Louis, Missouri. Just give us a call at 1-800-409-9732 or send us an email at [email protected] any day from 6 AM to 10 PM Central. We'll be more than happy to help in any way we can!

References: 

(1) Reddy, B Lakshmi et al. “Health Benefits of Intermittent Fasting.” Microbial physiology vol. 34,1 (2024): 142-152. doi:10.1159/000540068.

(2) Song, Dae-Kyu, and Yong-Woon Kim. “Beneficial effects of intermittent fasting: a narrative review.” Journal of Yeungnam medical science vol. 40,1 (2023): 4-11. doi:10.12701/jyms.2022.00010.

FAQ

Can I take vitamins while fasting?

It depends on the type of vitamin. Some may not break a fast, but it's generally best to take them with food for proper absorption.

Do supplements break a fast?

Some supplements do. Anything containing calories, sugar, or protein can break a fast.

Does taking supplements break your fast?

It depends on the ingredients. Always check for added sugars, oils, or amino acids.

What vitamins are best during fasting?

Water-soluble vitamins may be tolerated, but most vitamins are best taken during your eating window.