The Fitties Journal
Creatine Supplements: What to Know Before You Buy
Key Takeaways
Here's what matters most if you're short on time.
- Creatine is one of the most thoroughly studied sports supplements, according to the NIH Office of Dietary Supplements, and research links it to gains in strength, power, and lean body mass.
- Creatine monohydrate is the most widely used and studied form; the NIH Office of Dietary Supplements notes that pricier forms have not been proven superior to it.
- A daily maintenance dose of 3-5g is sufficient for most people; loading protocols are optional and only accelerate saturation by a few weeks.
- FitBoost+ pairs 3 g of creatine monohydrate with 400 mg of Peak ATP® (adenosine 5'-triphosphate disodium) in each scoop.
- Any early water gain from creatine is mainly inside muscle cells and short term, per a 2021 expert review (Antonio et al.), which also found no kidney damage in healthy people at recommended doses.
Most supplement ingredients live and die by marketing. The claims are big, the studies are often small and short (NIH Office of Dietary Supplements), and the gap between what is promised and what is delivered is wide enough to park a truck in.
Creatine is different. It is one of the most thoroughly studied supplements for exercise and sports performance (NIH Office of Dietary Supplements), with human trials linking it to gains in strength, power, and lean body mass. The supplement industry has a credibility problem, but creatine is an ingredient where the research actually holds up. The International Society of Sports Nutrition calls it one of the few supplements with consistent evidence of a performance benefit (Kreider et al., 2017).
Whether you are completely new to creatine or re-evaluating what you already know, this guide covers the science, practical dosing, form selection, and a few misconceptions that refuse to die.
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What Is Creatine?
Creatine is a naturally occurring compound made from three amino acids, arginine, glycine, and methionine. Your body produces small amounts on its own, primarily in the liver and kidneys, and you get additional creatine from dietary sources like red meat and fish.
Once creatine enters the bloodstream, most of it is taken up by skeletal muscle, where it is stored as phosphocreatine (also called creatine phosphate). Your muscles hold a finite amount. Diet and supplementation increase those stores, which is the entire premise behind creatine supplementation. More stored phosphocreatine means more available fuel for high-intensity work.
The body's creatine pool turns over daily. A portion is converted to creatinine, a metabolic byproduct that is excreted through the kidneys. This natural turnover means your stores need consistent replenishment, which is why daily supplementation is more effective than occasional use.
FitBoost+
FitBoost+ pairs 3g creatine monohydrate with 400mg Peak ATP in a single scoop, with 95mg of caffeine. Zero sugar, no artificial sweeteners or colors, plus bioactive B vitamins, electrolytes and Albion chelated minerals. One formula. No stacking required.
Shop FitBoost+How Creatine Works
To understand creatine, you need a quick primer on how muscles produce energy.
Your muscles run on adenosine triphosphate (ATP). Every contraction, every rep, every sprint burns ATP. The problem is that muscles only store enough ATP for a few seconds of maximum effort. After that, the body has to regenerate it.
This is where phosphocreatine comes in. During short, high-intensity efforts, phosphocreatine donates its phosphate group to ADP (adenosine diphosphate) to rapidly regenerate ATP. This reaction is fast, happening without oxygen, which makes it the dominant energy pathway for efforts lasting roughly 10 to 30 seconds, like heavy lifts, sprints, explosive jumps.
More stored phosphocreatine means you can regenerate ATP faster and sustain high-intensity output for slightly longer before fatigue sets in. That is the primary mechanism. It is simple, well-documented, and it is why creatine primarily benefits activities that rely on short bursts of maximum effort.
Beyond the phosphocreatine energy system, research has also explored secondary mechanisms. Creatine appears to increase intracellular water retention (cell volumization), which may act as a signal for muscle protein synthesis. Some research suggests creatine may also affect satellite cells, which are involved in muscle repair and growth. In a 16-week strength training study in young men, adding creatine produced larger increases in satellite cells during the first eight weeks than training with a placebo (Olsen et al., 2006). These mechanisms are less definitively established than the ATP regeneration pathway, but they add context to creatine's observed effects on lean body mass.
What the Research Shows
Creatine is not a supplement where you have to squint at a single underpowered study and hope the results hold up. The body of evidence is deep. More than 500 peer-reviewed publications have examined creatine supplementation, with research spanning adolescents to older adults and many types of training (Antonio et al., 2021).
The key findings are consistent. Creatine taken during training is associated with greater gains in strength, lean body mass, and high-intensity exercise capacity, and research suggests it may also enhance recovery after exercise (Kreider et al., 2017). In laboratory and sports studies, 5 to 7 days of creatine often significantly improved strength, power, work over repeated sets of maximal effort, and sprint performance in both men and women (NIH Office of Dietary Supplements).
Creatine research also extends beyond young athletes. A review by Smith et al. (2014) examined creatine supplementation in the context of age-related conditions, noting that its benefits reach beyond athletic performance. Research by Aguiar et al. (2013) found that long-term creatine supplementation supported muscular performance during resistance training in older women. Bemben and Lamont (2005) reviewed the broader body of evidence on creatine and exercise performance, reinforcing the consistency of findings across populations.
This breadth is what sets creatine apart. For many sports supplement ingredients, much of the research involves young adults, more often men than women, and many studies are limited by small samples and short durations (NIH Office of Dietary Supplements). Creatine has data across the spectrum. A large body of evidence shows it raises muscle creatine and phosphocreatine and can enhance exercise capacity and training adaptations in adolescents, younger adults, and older adults (Kreider et al., 2017).
Creatine Monohydrate vs. Other Forms
The supplement industry loves to reinvent ingredients. Creatine monohydrate is the original and most widely studied form (NIH Office of Dietary Supplements), but you will also find creatine HCL, creatine ethyl ester, buffered creatine (Kre-Alkalyn), and various other branded forms on the market. For the head-to-head on the most argued-about pair, see creatine monohydrate vs HCl, compared head to head.
Each comes with a marketing story. Better absorption. Less bloating. Smaller doses needed. The data tells a different story. None of these alternative forms have outperformed creatine monohydrate in controlled, peer-reviewed research. When studies compare forms head-to-head, monohydrate matches or beats the alternatives. A 2021 expert review found no peer-reviewed study showing that another form raises muscle creatine more than an equal dose of monohydrate, and most show the alternatives do less (Antonio et al., 2021).
This is not a case where the science has not caught up with innovation. Researchers have actively tested these alternatives. Creatine ethyl ester raised blood creatine less than monohydrate and did not beat it on muscle creatine, strength, or body composition over seven weeks of training (Spillane et al., 2009), and a buffered form did no better than monohydrate (Jagim et al., 2012). The results simply do not support the premium pricing. Monohydrate is not very soluble in water, but that has no influence on how much reaches the tissue. Nearly all of an oral dose is absorbed and either taken up by muscle or excreted in urine (Antonio et al., 2021). If you have seen "micronized" monohydrate on the shelf and wondered whether the finer grind changes anything, our comparison of micronized vs regular creatine monohydrate breaks it down. Form is one question; delivery format is another. If you are weighing chewable gummies against a scoop, our guide to creatine gummies vs powder compares the two on dose accuracy and reliability.
FitBoost+ uses creatine monohydrate. Not because it is the cheapest option (it is, but that is beside the point), but because it is the most validated. Using what works instead of what is trendy is a simple quality signal, and it is one worth looking for on any supplement label.
How to Use Creatine: Dosing, Timing, and Loading
Practical creatine supplementation is straightforward, which is refreshing in a category that tends to overcomplicate things.
Daily Dose
The standard maintenance dose is 3 to 5 grams per day. Daily doses in this range are well established in research for raising muscle creatine stores, and taken for at least four weeks they reach saturation levels similar to a loading phase (Antonio et al., 2021). Our full guide on how much creatine per day to take breaks the dose down by body weight and goal. FitBoost+ delivers 3g of creatine monohydrate per scoop, placing it within this evidence-based range.
Loading: Optional, Not Required
You will sometimes see a "loading protocol" recommended at roughly 20 grams per day (split into 4 doses of 5g) for 5 to 7 days, followed by the standard maintenance dose. Loading does work; it saturates muscle creatine stores faster, typically within a week. But it is not necessary. Starting at 3 to 5 grams daily will reach the same saturation point within approximately 3 to 4 weeks. The only trade-off is time. For a stage-by-stage view of both routes, see our breakdown of how long creatine takes to work.
Some people experience gastrointestinal discomfort at high loading doses. If that is a concern, skip the loading phase entirely. The destination is the same; the timeline just shifts slightly.
Timing
Creatine timing is less critical than consistency. The FitBoost+ label recommends consuming it 30 minutes before a workout on training days and in the morning on non-training days. One small study in recreational bodybuilders suggested post-workout creatine might have a slight edge for lean mass and strength (Antonio and Ciccone, 2013), but a 2022 review found that taking it before or after training produces similar muscle benefits (Candow et al., 2022). The most important factor is taking it daily. If you want to get precise about supplement timing, consistency beats optimization every time. And if you train fasted or practice intermittent fasting, see our guide on taking creatine while fasting.
Creatine and Oral ATP: How Are They Different?
Creatine and oral ATP are often paired, but they work in different ways.
Creatine replenishes the phosphocreatine pool, which your muscles use to regenerate ATP. Oral ATP is a different approach, and it does not simply add ATP to your bloodstream. In a small crossover trial, a single 5,000 mg dose did not raise blood ATP levels (Arts et al., 2012). Peak ATP (adenosine 5'-triphosphate disodium) is the branded form of oral ATP in FitBoost+, at 400mg per scoop.
In a 12-week trial of 21 resistance-trained men, 400 mg a day of oral ATP (Peak ATP) alongside a training program produced larger gains in strength, power and muscle thickness than placebo, and smaller performance drops during a planned overreaching phase; the study was funded in part by the ingredient's maker, which also supplied the capsules (Wilson et al., 2013). Smaller studies suggest it may work by improving blood flow after exercise (Jäger et al., 2014) and muscle excitability during repeated sprints (Purpura et al., 2017).
In a double-blind, placebo-controlled study, resistance-trained men taking 400 mg of Peak ATP daily for 12 weeks saw notable improvements over placebo in strength, power, and muscle thickness. Research by Purpura et al. found that 400mg of Peak ATP for two weeks helped maintain post-exercise ATP levels, supported peak power, and supported muscle excitability.
The case for taking both is a theory, not a tested result. Creatine is well studied for raising the creatine stored in muscle (Kreider et al., 2017), the oral ATP trials above tested ATP on its own, and we found no trial of the two combined.
FitBoost+ is a pre-workout that pairs both, with 3 g of creatine monohydrate and 400 mg of Peak ATP per scoop, alongside electrolytes, bioactive B vitamins and 95 mg of caffeine from a blend that includes a caffeine pterostilbene co-crystal.
What to Look for in a Creatine Supplement
Creatine monohydrate is inexpensive to manufacture, which means the category is crowded. Not all products are created equally, and a few quality markers are worth checking before you buy.
- Form: Look for creatine monohydrate specifically. If the label says "creatine blend" without specifying the form, that is a red flag.
- Dose transparency: The amount of creatine per serving should be clearly stated on the Supplement Facts panel, not buried in a proprietary blend. You need to know you are getting 3 to 5 grams per serving.
- Third-party testing: Verifiable testing claims (batch numbers, certificates of analysis) are more meaningful than the phrase "third-party tested" with no documentation behind it.
- Unnecessary additives: Artificial colors, artificial sweeteners, and fillers do not improve creatine's effectiveness. If a product needs a long list of additives to be palatable, question what else was compromised in the formulation.
- cGMP compliance: Manufacturing in a facility that meets or exceeds current Good Manufacturing Practices (cGMP) is a baseline quality standard.
If you want a deeper framework for evaluating supplement labels, the supplement buyer's guide and pre-workout label guide walk through what to look for (and what to avoid) in detail.
Common Questions and Misconceptions
Water Retention and "Bloating"
Creatine increases intracellular water, meaning water is drawn into the muscle cell itself. This is cell volumization, and it is considered a positive effect that may support anabolic signaling. It is not the same as subcutaneous water retention, which causes the soft, puffy appearance people associate with "bloating." Most users see a modest increase in scale weight (typically 1 to 3 pounds) from this intracellular hydration, particularly in the first few weeks.
Kidney Safety
Creatine is broken down into creatinine, which the kidneys filter out. Because creatinine is a standard marker for kidney function on blood panels, elevated levels from creatine supplementation can look concerning to someone unfamiliar with the context. However, in healthy people taking recommended doses, controlled research shows creatine does not cause kidney damage or reduced kidney function (Antonio et al., 2021). If you have a pre-existing kidney condition, consult your healthcare professional before supplementing.
Hair Loss
A single study in 20 college-aged rugby players observed an increase in DHT (dihydrotestosterone) levels following a creatine loading protocol (van der Merwe et al., 2009). DHT is linked to pattern hair loss, particularly in men, and genetics play a role in who develops it (MedlinePlus Genetics). However, that result has not been replicated. A 2025 randomized controlled trial in resistance-trained men found no difference in DHT or hair measures after 12 weeks of 5 g a day (Lak et al., 2025), and no study has confirmed a causal relationship between creatine and hair loss (Antonio et al., 2021). The current weight of evidence does not support this concern, but it persists because a single alarming headline travels further than a dozen reassuring follow-ups.
Creatine for Women
Creatine works through the same phosphocreatine energy system in everyone. Most creatine research has been done in men (Kreider et al., 2017), but a 2025 review reports that creatine has shown positive effects on muscle strength, exercise performance, and body composition in women, particularly when combined with resistance training (Smith-Ryan et al., 2025). The notion that creatine will cause women to "bulk up" confuses creatine's mechanism with hormonal effects it does not have. Women interested in strength training and body composition can benefit from creatine the same way men do.
Do You Need to Cycle Creatine?
No. We found no study showing that cycling creatine (taking it for a period, then stopping, then restarting) works better than continuous daily use. One argument for cycling, that daily creatine reduces the transporter that carries it into muscle, comes from animal studies at 5 to 10 times human doses; in people, two to four months of creatine with weight training did not reduce it (Tarnopolsky et al., 2003). Your body does not build a tolerance to creatine, and there is no documented downside to long-term supplementation at recommended doses. Consistency is the entire strategy.
Putting It Together
Creatine's reputation is earned. It is one of the rare supplement ingredients where the marketing claims and the research converge. Taken during training, it has been reported to increase strength, muscle mass, and high-intensity exercise capacity, and it may enhance recovery (Kreider et al., 2017), through a well-understood mechanism studied in more than 500 peer-reviewed publications (Antonio et al., 2021).
The practical application is a simple 3 to 5 grams of creatine monohydrate daily, taken consistently. If you would rather take creatine and ATP together, FitBoost+ has 3 g of creatine monohydrate and 400 mg of Peak ATP in a single scoop. If your goal is building a nutrition foundation for strength training or training through a calorie deficit, creatine belongs in your daily stack alongside protein and a solid training program.
The evidence is clear. The dosing is straightforward. The misconceptions, one by one, are losing ground to better data. If you are going to spend money on supplements, start with one that has actually earned the investment.
As with any supplement, consult a healthcare professional before starting creatine, especially if you have pre-existing health conditions or are taking medication.
FitBoost+
FitBoost+ pairs 3g creatine monohydrate with 400mg Peak ATP in a single scoop, with 95mg of caffeine. Zero sugar, no artificial sweeteners or colors, plus bioactive B vitamins, electrolytes and Albion chelated minerals. One formula. No stacking required.
Shop FitBoost+
