Creatine Loading Phase: Is It Really Necessary?

What Is the Creatine Loading Phase?

Creatine is a natural compound that your body makes from amino acids or obtains from foods like meat and fish². It's stored in your muscles for recycling ATP, the energy currency that powers movement². Each person has a limit to their storage capacity, and when they approach it, it's called saturation². While a well-rounded diet is the best way to obtain creatine and support your body's own production, a supplement can help raise muscle creatine levels².

A common recommended dose for creatine supplements is 3–5 g per day². Loading creatine means starting your creatine program by taking an initial higher daily dose (typically 20 g divided into four 5 g doses)². The goal is to reach saturation faster than you would by starting with the regular daily dose.

Benefits of Creatine Loading

A creatine loading phase will likely saturate your creatine stores quicker than taking a lower dose. One study found that men loading creatine (20 g per day) increased creatine stores 20% after 6 days, while those taking 3 g per day took 28 days to reach the same saturation¹.

What does this mean ultimately? Simply that you may see more of the potential benefits of creatine supplementation sooner²³. Creatine supplementation supports the body's natural energy production during repeated brief, high-intensity efforts³. If you have an important block of training sessions coming up and want to maximize the quality of your workout, you may want to use a loading phase.

While you may notice more pronounced muscle fullness when loading creatine, this is typically due to creatine drawing water into your muscle cells, and it can also help signal the muscle-building processes that support muscle growth over time².

Importantly, loading does not increase creatine storage capacity or result in long-term advantages over standard doses⁴.

How to Properly Load Creatine

Whether you use a loading phase or not, choose the right kind of creatine supplement. Creatine monohydrate is the best-studied form with the most evidence of effectiveness⁴.

To begin a loading phase for creatine monohydrate, first decide whether to use a common fixed-dose approach or to customize your loading dose to your weight.

• Fixed dose: 20 grams per day for 5–7 days, taken as four separate 5-gram servings².

If loading upsets your stomach, spread the creatine loading dose throughout the day⁵. Taking creatine with meals can help you remember.

After 5–7 days, reduce to a maintenance dose of 3–5 grams per day (including rest days) to keep stores up². If the larger loading dose causes GI discomfort, use the maintenance dose instead⁴.

Common Myths About Creatine Loading

Myth: Creatine Will Not Work Unless You Load

A creatine loading phase will increase muscle stores faster than taking lower doses, but it doesn't have any long-term advantages over standard 3–5 g/day doses¹.

Myth: A Break Automatically Means Starting the Loading Phase From Scratch

Creatine stores decline gradually, typically taking 4–6 weeks after pausing supplementation to return to baseline levels². Loading is optional when starting or restarting².

Myth: Any Rapid Weight Gain Is Either Fat or Brand-New Muscle

Early weight changes can include retained water, as creatine helps to draw water into muscle cells. The scale can't distinguish between water, fat, and new muscle tissue⁴.

For a deeper dive, read our guide to creatine myths.

Tips for Successful Creatine Loading

1. Use a simple routine. Attach divided servings to regular meals (breakfast, lunch, afternoon snack, and dinner) for consistency. Set a reminder to switch to the maintenance dose after one week.
2. Taking it with food is optional. While timing your creatine with meals can help you remember to take it, the food itself isn't necessary for absorption. Research shows that carbohydrates plus protein may help your muscles retain more creatine, but this doesn't mean you have to invest in special loading formulas²⁶.
3. Maintain normal exercise hydration. Proper hydration is always important (especially when exercising), but creatine hasn't been shown to impair hydration for healthy adults at recommended doses⁷.
4. Track training as well as weight. Because starting creatine can cause your muscles to retain more water, scale weight is not a reliable measurement of muscle gain. Instead of just tracking weight gain, note workout progress, such as repetitions and loads⁸.
5. Consider timing if body weight matters for your sport. If you participate in a sport that uses weight classes, allow for possible early water-weight increases during the period of loading creatine³.

Creatine Loading: The Bottom Line

While a creatine loading period may help you reach saturation faster than a lower dose, a gradual buildup works just as well¹. Creatine isn't a shortcut to muscle gain; it supports your body's natural energy systems during exercise.

Creatine doesn't work in isolation, either. Your energy levels and recovery ability are dependent on a range of factors, including eating a nutrient-rich diet of whole foods⁹. Foundational nutrition supplements can help close common nutrient gaps and work alongside creatine to support energy levels and help you progress in your training.

AG1 Pro delivers 5 grams of creatine monohydrate from Creavitalis® plus Ca-HMB, which work together to support muscle function and recovery.* It also contains over 80 vitamins, minerals, pre- and probiotics, and whole-food-sourced ingredients for energy and full-body health.*

References:

1. Hultman E, Söderlund K, Timmons JA, Cederblad G, Greenhaff PL. Muscle creatine loading in men. J Appl Physiol (1985). 1996;81(1):232-237. doi:10.1152/jappl.1996.81.1.232

2. 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;14:18. doi:10.1186/s12970-017-0173-z

3. Glaister M, Rhodes L. Short-term creatine supplementation and repeated sprint ability—a systematic review and meta-analysis. Int J Sport Nutr Exerc Metab. 2022;32(6):491-500. doi:10.1123/ijsnem.2022-0072

4. 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;18(1):13. doi:10.1186/s12970-021-00412-w

5. Ostojic SM, Ahmetovic Z. Gastrointestinal distress after creatine supplementation in athletes: are side effects dose dependent? Res Sports Med. 2008;16(1):15-22. doi:10.1080/15438620701693280

6. Steenge GR, Simpson EJ, Greenhaff PL. Protein- and carbohydrate-induced augmentation of whole body creatine retention in humans. J Appl Physiol (1985). 2000;89(3):1165-1171. doi:10.1152/jappl.2000.89.3.1165

7. Lopez RM, Casa DJ, McDermott BP, Ganio MS, Armstrong LE, Maresh CM. Does creatine supplementation hinder exercise heat tolerance or hydration status? A systematic review with meta-analyses. J Athl Train. 2009;44(2):215-223. doi:10.4085/1062-6050-44.2.215

8. Powers ME, Arnold BL, Weltman AL, et al. Creatine supplementation increases total body water without altering fluid distribution. J Athl Train. 2003;38(1):44-50.

9. Thomas DT, Erdman KA, Burke LM. American College of Sports Medicine Joint Position Statement. Nutrition and Athletic Performance. Med Sci Sports Exerc. 2016;48(3):543-568. doi:10.1249/mss.0000000000000852