Supplements
Does Creatine Break a Fast?
The short answer, the exceptions and how to take it.
Plain creatine has no meaningful calories, so it fits inside a fast. Here is where that stops being true, and how to take it on fasting days.
No. Plain creatine monohydrate mixed in water does not break a fast for most people, because it has no meaningful calories, sugar, protein or fat. The exceptions are creatine gummies, flavoured mixes and pre-workouts that add sugar or other calories, and strict fasts where anything other than water counts as breaking it.
Key takeaways
- Plain, unflavoured creatine monohydrate in water fits inside an intermittent fast.
- Gummies, flavoured powders, pre-workouts and protein blends can break a fast. Read the label.
- A common daily dose is 3–5 g. A loading phase is optional.
- You don't need to pause creatine on fasting days. Take it at a time you will remember.
- Religious fasts, fasting blood tests and doctor-led fasts have their own rules. Follow those.
- Breaks a fast?
- No, if plain and unflavoured
- Daily dose
- 3–5 g
- Loading phase
- Optional: 20 g a day as 4 × 5 g for 5–7 days, then 3–5 g
- When to take it
- Any time you'll remember every day
The answer
Does creatine break a fast?
For most people, no.
A fast, in the way most people use the word, means a stretch of time without calories. Intermittent fasting works on that rule: no food and nothing with calories until your eating window opens.
Plain creatine monohydrate has no meaningful calories, no sugar, no protein and no fat. Mixed in water, it does not end that kind of fast.
Two things change the answer:
- What is in the scoop. Many creatine products are not just creatine. Gummies, flavoured powders and pre-workouts often add sugar, sweeteners, fillers or other ingredients with calories.
- What kind of fast you are doing. If your fast allows nothing but water, a religious fast for example or a fasting blood test, then creatine counts as intake. Follow that rule.
Fasting rules
What breaks a fast?
It depends on why you are fasting.
If you fast for calories (intermittent fasting)
Anything with calories ends the fast. That means food, and drinks or supplements that contain sugar, protein, carbohydrate or fat.
Usually fine during a fast
- Water, sparkling water
- Plain black coffee, plain tea
- Plain creatine monohydrate in water
Breaks a fast
- Food of any kind
- Juice, soda, sports drinks
- Milk, cream or sugar in coffee or tea
- Protein shakes, BCAA or amino drinks
- Creatine gummies, sugared gum
- Supplements with sugar, oils or other calories on the label
Sugar-free gum and sweetened "zero" drinks are a grey area. People draw the line differently. If you want a clean fast, stick to the "usually fine" list.
If you fast for another reason
Some fasts are stricter than "no calories":
- Religious fasts often exclude all food and drink for set hours. Take creatine in the hours when eating is allowed.
- Fasting blood tests and medical fasts come with instructions from your doctor or clinic. Follow them, and ask before taking any supplement during that fast.
If you fast to manage your diet while building muscle, see my guide to intermittent fasting and muscle growth.
Read the label
Which creatine products can break a fast?
The word "creatine" on the tub does not tell you what else is inside. Check the ingredient list and the nutrition panel.
- 01
Plain creatine monohydrate powder
One ingredient. Mixed in water, it fits inside a fast.
- 02
Capsules
Usually fine. The capsule shell and fillers add very little, but read the label if you are strict.
- 03
Flavoured creatine and pre-workouts
Often contain sugar, carbohydrate or other ingredients with calories. Take them in your eating window.
- 04
Gummies and chews
Usually made with sugar or other carbohydrate. Treat them as food.
The basics
What is creatine?
Creatine is a compound your body already makes. Your liver and kidneys build it from three amino acids: glycine, arginine and methionine. You also get it from food. Red meat, pork and fish such as salmon all contain creatine.
Your muscles use creatine as a fast energy source for short, hard efforts: a heavy set, a sprint, an explosive jump, the kind of work in the best full-body exercises. Taking it as a supplement raises the amount stored in your muscles.
That is why creatine is popular with people who lift weights or do short, intense training. It is not a stimulant and it does not work like caffeine. You don't "feel" a scoop the way you feel a pre-workout.
Creatine helps you train hard; how much you should train still decides your results.
Step by step
How to take creatine on fasting days
- 01
Pick plain creatine monohydrate
It is the simplest product and the easiest to fit inside a fast.
- 02
Choose your dose
A common daily dose is 3–5 g. I recommend 5 g a day for most people, with no loading phase.
- 03
Decide on loading (optional)
Some people load with 20 g a day, split into four 5 g servings, for 5–7 days, then drop to 3–5 g a day. Loading fills your muscles faster. Skipping it gets you to the same place over a few weeks.
- 04
Mix it in water
Water keeps the fast clean. Juice, milk or a shake does not.
- 05
Take it every day, fasting or not
On fasting days, take it during the fast with water, or with your first meal. Pick one and stick to it.
- 06
Drink enough water
Drink water through the day, fasting or not.
Side effects
Is creatine safe while fasting?
The US National Institutes of Health's Office of Dietary Supplements describes it as safe for short-term use by healthy adults, with evidence that several years of use is safe.
What to expect:
- Weight gain. Creatine often adds some body weight, because your muscles hold more water. This is not fat.
- Stomach upset. Some people get nausea or loose stools. If that happens, take it with your first meal or split the dose.
- Hydration. Drinking enough water may reduce these uncommon issues.
Your body breaks creatine down into creatinine, which leaves through your kidneys.
What to avoid
Common mistakes
- 01
Taking gummies during the fast
Gummies are usually sweetened. They end a calorie fast. Take them with food, or switch to plain powder.
- 02
Mixing it into a shake
Protein shakes, BCAA drinks and juice all have calories. The drink breaks the fast, not the creatine.
- 03
Loading on an empty stomach
Four 5 g servings a day can upset your stomach. If it does, skip loading, or take those servings with meals.
- 04
Skipping fasting days
Creatine works by keeping your muscle stores topped up. Missing days slows that down.
- 05
Not drinking enough
Fasting plus training plus creatine means you need water. Keep a bottle with you.
Questions
Creatine and fasting: FAQ
Can I take creatine on an empty stomach while fasting?
Yes. Plain creatine monohydrate in water has no meaningful calories, so it does not end an intermittent fast. Many people take it on an empty stomach. If it upsets your stomach, take it with your first meal instead. You lose nothing by moving it into your eating window, as long as you take it every day.
Do creatine gummies break a fast?
Usually, yes. Most creatine gummies are made with sugar or other carbohydrate to give them their texture and taste, which means they contain calories. That ends a calorie-based fast. Check the nutrition panel on your product. If it lists calories or sugar, eat the gummies in your eating window, or switch to plain creatine monohydrate powder mixed in water during the fast.
Does creatine have calories?
Plain creatine monohydrate has no meaningful calories. It is not a carbohydrate, fat or protein that your body burns for fuel. Many creatine products are more than plain creatine, though. Flavoured powders, pre-workouts and gummies can add sugar and other ingredients with calories. The nutrition panel on your tub is the answer for your product. If it lists calories, treat it as food.
Should I take creatine on days I fast?
Yes. Creatine works by keeping the creatine stores in your muscles topped up, so take it every day. On fasting days, take your usual 3–5 g in water during the fast, or with your first meal when your eating window opens. Choose whichever you will remember. Skipping fasting days slows down how quickly your stores fill, especially if you are not loading.
Can I take creatine during Ramadan?
Yes, in the hours when eating and drinking are allowed. A Ramadan fast excludes all food and drink from dawn to sunset, so a scoop of creatine in water during the day would break it. Take your daily dose with the evening meal or the pre-dawn meal instead, and drink enough water in those hours. If you have a medical condition, check with your doctor first.
Does creatine affect a blood test?
Your body breaks creatine down into creatinine, a waste product that leaves through your kidneys. Creatinine is something doctors look at in some routine blood tests. If you have a blood test coming up, tell your doctor you take creatine so they can read the results with that in mind. For a fasting blood test, follow the clinic's fasting instructions, and ask before taking any supplement.
Summary
The bottom line
Plain creatine monohydrate in water does not break an intermittent fast. Read the label, keep flavoured products and gummies for your eating window, take 3–5 g every day, and follow the rules of any stricter fast you are doing. Creatine supports your training. It does not replace it.
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