Do you need carbs with creatine?

October 8, 2026

Creatine monohydrate supplement with scoop

No. Creatine already absorbs through the gut at close to 100 percent whether or not you eat anything with it. Large amounts of carbohydrate, 50 to 100 grams in the original trials, can boost how much of that creatine your muscles end up holding onto, but that bump hasn't been shown to translate into extra strength or performance.[1][2][4]

The idea sticks around because it sounds mechanical in a satisfying way: insulin opens a door, creatine walks through, more creatine ends up in the muscle. That part is true as far as it goes.[2] What gets lost is the scale of the studies behind it and the fact that nobody has shown the extra retention actually makes you stronger.

Where the carb idea actually comes from

The claim traces back to two small trials, both decades old. In one, subjects took 5 g of creatine followed 30 minutes later by 93 g of simple sugar, four times a day, and ended up retaining about 60 percent more creatine than a group taking creatine alone.[4] In the other, subjects took 5 g of creatine alongside either about 96 g of carbohydrate, or a smaller mix of 50 g of protein and 47 g of carbohydrate, and both combinations raised whole-body creatine retention by roughly 25 percent compared with creatine plus a token 5 g of carbohydrate.[3]

The mechanism behind the bump looks the same in both: a large insulin spike, not the sugar itself, is what appears to pull more creatine into muscle cells.[2][3][4] That is a real, measurable effect. It is also based on a couple of short trials from decades ago, and a faster saturation rate has not been shown to produce more strength, more size, or better performance.[2][3]

Image placeholder: a single 5 g creatine scoop next to roughly 90 grams of table sugar, shown for scale.

Absorption and muscle retention are two different questions

The "shuttle" framing usually gets one thing backwards. It is not that carbs help creatine get absorbed. Oral creatine monohydrate is already absorbed into the bloodstream at close to 100 percent, carbs or no carbs.[1] The question the carb studies actually answer is narrower: once creatine is circulating in your blood, how much of it does your muscle hold onto, versus how much gets filtered out and excreted.

Getting into the blood and getting pulled into a muscle cell are two separate steps, and the insulin effect those carb studies describe acts on the second one.[3] A sugar spike does nothing for the first step, which was never the bottleneck to begin with.

Did the extra retention turn into more strength?

This is the part most sites skip. A 2017 trial tested the performance question directly, splitting 20 healthy, physically active men into three groups: creatine only, creatine plus carbohydrate, and placebo.[4] All three groups followed the same schedule, then a cycling power test.[4] The carbohydrate group performed no better than the creatine-only group on that test.[4] The authors' own conclusion: adding carbohydrate "does not result in any additional benefit" for that performance measure.[4]

That trial didn't measure retention at all; it tracked body mass, cycling power, and blood lactate.[4] Put next to the earlier trials, the honest picture spans two different studies: the retention bump shows up in the carbohydrate-loading trials described above,[3][4] and the absence of a measurable performance edge shows up in this separate study, which never tested retention in the first place.[4] Nobody has run both measurements in the same subjects: the trials that found higher muscle creatine never included a performance test.[4]

A 2024 review in the Journal of the International Society of Sports Nutrition lands in the same place. It finds "limited evidence" that pairing creatine with carbohydrates or other insulin-sensitizing nutrients produces greater changes in body composition or performance, and says creatine "is effective whether it is co-ingested with other nutrients or not."[2]

Worth saying plainly: that 2017 trial was small, all male, young, and tested one kind of short anaerobic effort. It does not rule out some narrow benefit nobody has bothered to measure yet. But the honest summary of what has actually been tested is that the retention bump is real and the performance payoff has not shown up.

So why does half the internet tell you to add sugar?

Because a 60 percent number is a more exciting headline than "no measurable difference." Most of what ranks for this question reads like brand content paraphrasing those trials, without the sample sizes, the dose, or the part where no performance benefit has been demonstrated.

None of this touches two separate questions. Whether taking creatine on an empty stomach causes stomach upset is a digestion question, not an insulin one. And when during the day you take it is mostly about building a habit you'll actually keep.

Do you need to add anything to a scoop of creatine?

No. Creatine monohydrate is micronized to dissolve into plain water, coffee, or a shake without grit, and 5 g is 5 g whether you drink it on its own or with a meal. There's no second ingredient to add, no dextrose to measure out, and nothing on the label that changes if you skip the sugar. If you already take it with a carb-heavy meal or a protein shake for reasons that have nothing to do with this myth, that's fine too. Neither choice has been shown to make the dose work better or worse.[2]

FAQ

Does taking creatine with juice or a sports drink help it absorb? Not in the way "absorb" usually means. Oral creatine already gets into the bloodstream at close to 100 percent on its own.[1] The retention bump in the carbohydrate trials came from 93 to 96 g of carbohydrate at a sitting, far more than a glass of juice or a sports drink carries, and even then it is a muscle-uptake effect rather than a faster trip through the gut.[3][4]

What if I take creatine with a protein shake instead of sugar? In the one trial that compared them directly, pairing creatine with about 50 g of protein and 47 g of carbohydrate retained about as much creatine as 96 g of carbohydrate alone.[3] Protein works through the same insulin pathway, just with less sugar needed to get there.

Is there a downside to eating 90 g of sugar just for the creatine? Mostly that it's a lot of added sugar for an unproven gain. The Dietary Guidelines for Americans put a reasonable daily ceiling around 50 g of added sugar on a 2,000-calorie diet, and the American Heart Association's figures run lower, around 24 to 36 g.[5] Spending most or all of that budget on a creatine scoop, with no demonstrated performance payoff, is a trade most people wouldn't choose if they saw it written out.

Does creatine need insulin to work at all? No. Creatine builds up in muscle through ordinary daily dosing with or without an insulin spike, and it is effective whether or not it is taken with other nutrients.[2] Co-ingesting carbohydrate appears to produce a faster saturation rate, which only matters while those stores are still filling.[3]

The short version

Drink your creatine however fits your day. Water is enough. The 90 g of dextrose some corners of the internet recommend is chasing a retention number that has never been shown to make a difference on a performance test.[2][4]

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.