Quick answer

Taking creatine every day matters more than the hour. Trials that gave 5 g, or 0.1 g per kg, just before or just after training found similar strength gains, though one 32-week trial in adults over 50 saw more lean tissue with the after-training dose. Split loading amounts into 5 g servings.^1,2,3,4

Key facts

Blood creatine peaks about an hour after a 5 g dose, and nearly all of it is absorbed.^5,6
A 2021 review found no agreement on the best time: some results lean toward after exercise, but the studies are too limited to settle it.⁷
Dissolved creatine slowly turns into creatinine, so a drink mixed days ahead holds less.⁶
One 10 g serving a day caused more loose stools than two 5 g servings in a 28-day trial.⁸

Before or after training

Trials that gave creatine just before or just after weight training found similar gains in strength. In one 32-week trial in adults aged 50 to 71, strength rose about equally with either timing, and the group taking it after training gained more lean tissue than the placebo group.^1,2,3,9

The trials are small. In 19 recreational bodybuilders taking 5 g a day for four weeks, the before and after groups did not differ by standard statistics; a looser method suggested after might be slightly better. In 10 young adults who trained each side of the body on a different schedule, muscle size and strength rose equally over 8 weeks.^1,9

In 34 college athletes, men and women, 5 g taken within an hour before or after training for 8 weeks gave the same results, and neither group did better than placebo when all three also took whey and carbohydrate. The 32-week trial in adults aged 50 to 71 used 0.1 g per kg on each training day: strength rose with either timing, and lean tissue rose more than placebo when the dose came after training.^2,3

Put together, these trials give no strong reason to pick one side of a workout. Where small trials leaned one way, they leaned toward taking it after.^3,7,9

On rest days

The point of daily creatine is to keep muscle stores full, and a daily maintenance amount is what keeps them there. In the bodybuilder trial, people took their 5 g on rest days whenever it suited them. No trial has tested a particular hour on days off.^6,9

With a meal, carbohydrate or protein

In 24 men, taking each 5 g loading dose with about 93 g of sugar raised muscle creatine 60 percent more than creatine alone. The ISSN notes that adding carbohydrate, or carbohydrate and protein, raises uptake but may not add to performance.^6,10

Taken four times a day, that much sugar adds a lot of calories, and the extra storage may not show up as extra performance. A review of creatine in women suggests a simpler route: take it with a usual meal or stir it into a protein shake. Creatine is absorbed well on its own, so an empty stomach works too.^6,11

Spacing a loading week

Loading studies spread about 20 g a day over four 5 g portions for 5 to 7 days. In the first study of this kind, 5 g taken every 2 hours kept blood creatine high through the day, and muscle took up the most in the first 2 days.^4,5

Spacing the portions also spares the stomach. In soccer players, loose stools were twice as common with one 10 g serving a day as with two 5 g servings.⁸

Mixing it: hot, cold or made ahead

Creatine powder keeps for years, but dissolved creatine slowly turns into creatinine, faster in warm or acidic drinks. After 3 days at room temperature, 4 to 21 percent was lost, depending on how acidic the liquid was.^6,12

So mix it shortly before you drink it rather than leaving a bottle for days, especially in juice or other acidic drinks. Creatine dissolves slowly, about 14 g per liter at room temperature. Warm liquid dissolves more, which is why early studies served it in hot tea, but how well it dissolves does not change how much muscle takes up.¹²

Before you start

Timing does not change the cautions. Check with a doctor first if you have kidney disease, are pregnant or breastfeeding, are under 18, or take a medicine that affects the kidneys.

Questions people ask

Should I take creatine in the morning or at night?

Either fits the research. Timing studies have compared before and after training, not morning and evening, and what the positive trials share is a daily dose kept up for weeks.^6,7

Can I take creatine on an empty stomach?

Yes. Almost all of a dose is absorbed and blood levels peak about an hour later. If it unsettles your stomach, take it with a meal or split it into smaller servings.^5,6

What is the best time to take creatine for women?

The same as for men. In the timing trial that included women, before and after training gave the same results, and a review of trials in women suggests taking it with a usual meal.^2,11

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Sources

This page is information, not medical advice. Talk to your doctor or pharmacist about your own situation.