Creatine Loading, Maintenance and the "Loading Is Required" Myth: What Studies Describe
What researchers mean by creatine loading and maintenance, what the key muscle studies measured, and why reviews say loading is not required, without personal dosing advice.
Content last updated . This page has not been medically reviewed.
Quick answer
In studies, "loading" means a short period of high daily amounts, followed by "maintenance" at lower daily amounts. Reviews conclude that loading is not required for muscle creatine to rise: smaller daily amounts also raise it, only more slowly. [1] This page describes study protocols. It is not a recommendation, and what is right for a person is a decision for them and their clinician or pharmacist.
How the studies define the terms
- Loading: in the 2021 review, oral creatine for 5 to 7 days at 20 to 25 g a day, often divided into smaller servings. It may also be set by body mass, for example 0.3 g per kg per day. [1]
- Maintenance: a lower daily amount afterward, often 3 to 5 g a day in the same review. [1]
- Low-amount approach: daily intake without loading, such as 3 g a day for 28 days in the study below. [2]
What the key study found
A 1996 study in 31 men measured muscle creatine after different protocols. [2]| Protocol in the study | Result in muscle |
|---|---|
| 20 g a day for 6 days | Total creatine rose about 20% |
| Then 2 g a day for 30 more days | The raised level was maintained |
| 3 g a day for 28 days | A similar but more gradual rise of about 20% |
| Stopping | Level fell back to baseline about 30 days later |
The authors concluded loading is the rapid route, and that 3 g a day is likely as effective at raising levels in the long term. [2] The 2021 review used the same study to say muscle creatine rose by a similar amount either way, and noted the trade-off that the lower approach delays the point of maximum storage. [1]
Is the "loading is required" claim a myth?
The claim says you must load to get any effect. The 2021 review calls this a common misconception because smaller daily amounts are well established for raising muscle creatine and training gains compared with placebo. [1] Loading is better described as a faster way to get there. Note that the review authors, like several of the ISSN position stand authors, declare ties to the creatine industry. [1] [3]What loading studies also report
- Weight and water: the 2021 review says a loading phase typically results in a 1 to 3 kg increase in body mass, mostly water. [1] See creatine, water retention and body weight.
- Stomach: the review says single amounts above 10 g may lead to diarrhea, which is why loading studies split servings. [1]
- With carbohydrate: in a 1996 study of 24 men, adding carbohydrate to creatine servings gave 60% more rise in muscle total creatine over 5 days than creatine alone. [4] See timing, food and caffeine.
- Differences between papers: one critical review reports the same 1996 data with slightly different percentages for each protocol, so exact numbers should be taken from the original study. [5]
Frequently asked questions
What is a creatine loading phase?
In studies, 5 to 7 days at 20 to 25 g a day, often split into smaller servings. [1]
Is loading required?
No. The 2021 review concludes smaller daily amounts also raise muscle creatine, more slowly. [1]
How did the key study compare loading and a low amount?
Both raised muscle creatine about 20%: in 6 days with 20 g a day, or in 28 days with 3 g a day. [2]
Does loading cause weight gain?
The review says a 1 to 3 kg gain, mostly water, is typical during loading. [1]
What happens to muscle creatine after stopping?
In the 1996 study it returned to baseline about 30 days after stopping. [2]
More details: evidence, limits and cautions
The details behind this page: cautions, limits of the evidence and where sources disagree. Open any note to read it.
Who should check first
People with kidney disease, on medicines that affect the kidneys, pregnant or breastfeeding, or under 18 should talk to a clinician or pharmacist before any high-amount protocol. See kidney questions, medication interactions and the reference table of study amounts.
References
- Antonio J, Candow DG, Forbes SC, et al. Common questions and misconceptions about creatine supplementation: what does the scientific evidence really show? J Int Soc Sports Nutr 2021 (full text read via PMC7871530; several authors declare creatine-industry funding or advisory roles). Read 2026-10-22.
- Hultman E, Soderlund K, Timmons JA, Cederblad G, Greenhaff PL. Muscle creatine loading in men. J Appl Physiol 1996 (abstract read). Read 2026-10-22.
- Kreider RB, Kalman DS, Antonio J, et al. International Society of Sports Nutrition position stand: safety and efficacy of creatine supplementation in exercise, sport, and medicine. J Int Soc Sports Nutr 2017 (full text read via PMC5469049; prepared at the request of the Council for Responsible Nutrition and the ISSN; several authors declare industry ties). Read 2026-10-22.
- Green AL, Hultman E, Macdonald IA, Sewell DA, Greenhaff PL. Carbohydrate ingestion augments skeletal muscle creatine accumulation during creatine supplementation in humans. Am J Physiol 1996 (abstract read). Read 2026-10-22.
- Kreider RB, Jager R, Purpura M. Bioavailability, Efficacy, Safety, and Regulatory Status of Creatine and Related Compounds: A Critical Review. Nutrients 2022 (full text read via PMC8912867). Read 2026-10-22.
Education, not medical advice. This page is for general information. It does not diagnose or treat any condition and is not a substitute for care from a qualified health professional. Natural does not automatically mean safe. Ask a clinician or pharmacist before changing your care, especially if you take medication, are pregnant or breastfeeding, or have a health condition.