A single 5-gram dose of the new OptiCreatine form raised blood creatine levels in the same way as standard creatine monohydrate, according to Gram Research analysis of a 2026 study of 17 healthy adults. Stomach side effects were mild and similar for both forms.
Creatine is one of the most popular supplements for muscle and exercise performance, but standard creatine monohydrate can sometimes upset the stomach. Researchers tested a newer version called OptiCreatine against the standard form. According to research reviewed by Gram, 17 healthy young adults each took a single 5-gram dose of each type on separate visits, and blood samples were tested over five hours. Blood creatine levels rose in nearly the same way for both forms, and stomach symptoms were mild and similar for both. The study was small and looked only at one dose, so it cannot show how the new form works over weeks of use or whether it performs better for muscle gains. Still, the results suggest OptiCreatine is absorbed in a similar way to the standard version.
Key Statistics
A 2026 randomized crossover study of 17 healthy adults found no statistically significant difference in blood creatine levels between OptiCreatine and standard creatine monohydrate after a single 5-gram dose (p = 0.707).
In the same 2026 study, stomach symptoms were reported as infrequent and mild for both OptiCreatine and standard creatine monohydrate among the 17 participants.
A 2026 study of 17 adults found that the time to peak blood creatine differed between the two forms by an average of only 0.04 hours, a difference that was not statistically significant (p = 0.54).
The Quick Take
- What they studied: Researchers asked whether a newer form of creatine, called OptiCreatine, enters the bloodstream in the same way as standard creatine monohydrate, and whether it causes the same stomach problems.
- Who participated: The study included 17 healthy adults who exercise recreationally, with an average age of about 22. There were 8 men and 9 women.
- Key finding: Blood creatine levels after one 5-gram dose were statistically the same for both forms (p = 0.707, where anything above 0.05 means no meaningful difference was detected). Stomach symptoms were mild and similar for both.
- What it means for you: If you use creatine, the new OptiCreatine form appears to be absorbed much like standard creatine in the short term. This does not prove it is better, and it does not show what happens with daily use over months. Talk with a doctor or dietitian before starting any supplement.
The Research Details
This was a randomized, double-blind, crossover study. Randomized means the order of the two creatine types was assigned by chance. Double-blind means neither the participants nor the researchers knew which type was which during the testing. Crossover means each person took both types, on two separate visits, so each person served as their own comparison.
On each visit, participants fasted overnight and then drank a single 5-gram dose of either standard creatine monohydrate or OptiCreatine. Researchers drew blood at baseline and at 30, 60, 90, 120, 180, 240, and 300 minutes afterward to measure creatine levels in the blood. They then used mathematical models to describe how quickly the creatine was absorbed, how high it peaked, and how long it stayed in the body.
Participants also completed standard questionnaires about digestive symptoms such as bloating, cramping, or nausea after each visit. This allowed the team to compare how each form felt in the stomach.
A crossover design is useful because each person’s body serves as the control, which reduces the influence of differences between people. Randomizing the order and keeping the study double-blind lowers the chance that expectations or bias shaped the results. Together, these features make the comparison between the two forms fairer than a simple before-and-after study.
The study used a recognized design and measured blood levels at several time points, which gives a detailed picture of absorption. However, it was small, with only 17 participants, and it tested only one dose on one occasion. Results from a small study can shift with a larger group, and the study was not designed to detect small differences. It was also funded or supported in part by the company that makes OptiCreatine, which readers should keep in mind when weighing the findings.
What the Results Show
Blood creatine levels rose over time with both forms, which is expected because the body absorbs creatine after a dose. When researchers compared the two types across all participants, there was no meaningful difference at any time point (p = 0.707). The same held true when men and women were looked at separately (men p = 0.318, women p = 0.996).
The researchers also compared the shape of the absorption curve. These measures included how high blood levels peaked, how long it took to reach that peak, how quickly the creatine entered the blood, and how quickly it left. Differences between the two forms were very small and not statistically significant for any of these measures. For example, the time to peak differed by less than a tenth of an hour on average (p = 0.54).
The study also checked whether sex changed how the two forms behaved, and it did not (all interaction p values were 0.05 or higher). In plain terms, the new formula behaved similarly for both men and women in this group.
Stomach symptoms were reported as infrequent and mild for both forms. Researchers did not find a clear advantage for either version in digestive comfort. This matters because one of the main reasons OptiCreatine was developed was to reduce stomach upset, and this study did not show a clear improvement over standard creatine. The symptom data were described mostly in general terms, so the results are best seen as a descriptive snapshot rather than a firm conclusion.
Creatine monohydrate has been studied for decades and is widely considered effective and safe for healthy adults, with many trials showing gains in strength and muscle performance. Newer forms have been marketed with claims of better absorption or fewer side effects, but many of those claims have had limited direct testing. This study fits with the idea that OptiCreatine is absorbed in a similar way to standard creatine, but it does not yet show that it works better or that it improves muscle or exercise outcomes.
The study was small, with 17 people, and only one dose was tested. Blood levels after one dose do not tell us how the creatine is used by muscles over days or weeks. Participants were young, recreationally active adults, so results may not apply to older adults, athletes, people with medical conditions, or people taking other medications. The study also measured short-term absorption only and did not test muscle creatine, strength, or body composition. Because the research was supported in part by the manufacturer, independent confirmation would be valuable.
The Bottom Line
Research suggests that OptiCreatine is absorbed in a similar way to standard creatine monohydrate after a single dose (moderate confidence, based on one small study). Standard creatine monohydrate remains the form with the most long-term research behind it, so it is still a well-supported choice (high confidence). Anyone considering OptiCreatine should expect it to behave much like standard creatine in the body, but not assume it works better.
People who already use creatine and have had stomach trouble with standard powder may find this research of interest, along with sports nutrition professionals and product researchers. People who are pregnant, have kidney or liver problems, take medications, or have other health conditions should speak with a doctor before using any creatine product. Children and teens should only use creatine under medical guidance.
Creatine works by gradually building up stores in the muscles, which typically takes one to four weeks of regular use, whether standard or new forms. This study measured only the first five hours after a single dose, so it cannot show when any benefits might appear. Any effects on strength or muscle would need longer studies to confirm.
Frequently Asked Questions
Is OptiCreatine absorbed the same way as regular creatine monohydrate?
A 2026 study of 17 healthy adults found that blood creatine levels after a single 5-gram dose were statistically the same for OptiCreatine and standard creatine monohydrate. Absorption speed and peak levels also showed no meaningful differences between the two forms.
Does OptiCreatine cause fewer stomach problems than standard creatine?
Stomach symptoms in the 2026 study were low and similar for both forms after a single dose. The study did not show a clear advantage for OptiCreatine in digestive comfort, so people who have stomach trouble should test each form carefully.
How long does it take for creatine to start working?
Creatine typically builds up in muscles over one to four weeks of regular daily use. The 2026 OptiCreatine study only measured blood levels for five hours after one dose, so it did not show when any strength or muscle benefits would appear.
Should I switch from creatine monohydrate to a newer creatine form?
Standard creatine monohydrate has the most long-term research behind it and remains a well-supported choice. Newer forms like OptiCreatine appear to absorb similarly in the short term, but more research is needed before assuming they offer extra benefits.
Want to Apply This Research?
- Log each daily creatine dose in grams, the product type (standard or OptiCreatine), and the time taken. Add a simple 0 to 3 rating for any stomach discomfort within two hours of taking it.
- Take creatine at the same time each day with a meal or drink, and track whether stomach discomfort changes when switching between forms. Keep the dose consistent so you can compare results fairly.
- Review your log every four weeks to look at consistency, stomach symptoms, and training progress such as strength or reps. If you switch forms, note the date and keep tracking for at least four weeks so you can judge the change reliably. Share the log with a healthcare provider if you have questions.
This article summarizes a small, short-term research study and is for general information only. It is not medical advice. Creatine supplements are not right for everyone, especially people with kidney or liver conditions, those who are pregnant or breastfeeding, and children. Please consult a qualified healthcare provider or registered dietitian before starting, changing, or stopping any supplement.
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.