Creatine as a supplement: complete guide for strength training in 2026

Creatine monohydrate is the most-researched sports nutrition supplement in the world. It increases the amount of phosphocreatine in your muscles, so you can keep performing at full force during explosive efforts like heavy squats or sprints. With a daily intake of 3 to 5 grams, most people see a measurable strength increase within four to eight weeks, combined with a slight rise in muscle mass. Realistic expectations are the key.

What creatine is and how it works in your muscles

Creatine is a substance that occurs naturally in your body, stored mainly in your muscles. During the first seconds of a heavy set or explosive sprint, your body burns through ATP (adenosine triphosphate) at lightning speed — that’s the direct fuel for every muscle contraction. As soon as that ATP runs out, your body switches to phosphocreatine to regenerate it quickly. The more phosphocreatine you have available, the longer you can perform at high intensity before fatigue kicks in.

The role of phosphocreatine in strength training

During maximum effort of five to fifteen seconds, like a heavy bench press set or an explosive strength exercise, your ATP supply runs out in just a few heartbeats. Phosphocreatine then donates a phosphate group to ADP to form new ATP quickly. By boosting this system with supplementation you enlarge that energy reserve, which translates directly into extra reps or extra kilos per working set.

How much creatine your body makes itself

Your liver and kidneys produce 1 to 2 grams of creatine per day from the amino acids arginine, glycine and methionine. Via meat and fish your body takes in another 1 gram or so. With that, your muscles function at 60 to 70 percent of their maximum creatine capacity. Supplementation fills that gap and brings your muscle stores to full saturation — something that’s barely achievable through food alone.

Proven effects of creatine monohydrate

Decades of scientific research confirm that creatine monohydrate works. It improves strength, explosiveness and recovery, although the extent varies per person. Roughly 25 to 30 percent of users experience little effect. These non-responders typically already have high muscle values thanks to a meat- and fish-rich diet. For the majority, though, results are clearly measurable — especially in combination with progressive loading.

Effect on 1RM and explosive strength

Controlled studies show that participants who took creatine increased their one-rep max on squat and bench press by an average of 5 to 8 kilograms more than the placebo group, measured over eight weeks. That sounds modest, but in strength training an extra 5 kilograms on your 1RM after two months is serious progress.

Muscle mass and water retention

Beyond the strength increase, creatine also stimulates real muscle protein synthesis, particularly combined with adequate protein intake. In the first week you’ll see a weight gain of 0.5 to 2 kilograms: that’s intracellular fluid, not fat. That extra cell hydration gives muscles a fuller appearance and supports recovery after heavy sessions.

Dosage and timing: loading phase or not

There are two ways to start with creatine: with or without a loading phase. Both lead to the same end result — the only difference is how quickly your muscle stores fill up.

Loading phase versus immediate maintenance dose

With a loading phase you take 20 grams per day for five to seven days, spread across four portions of 5 grams. Then you switch to 3 to 5 grams per day as a maintenance dose. Your muscle stores are fully filled within a week. If you choose the immediate maintenance dose without loading, full saturation takes three to four weeks. The end result is identical — only the route differs.

Taking it before or after training

Timing matters less than consistent daily intake. Research lightly indicates that taking it around training, before or right after, is slightly more effective than at a random moment. Dissolve your creatine in water, juice or a protein shake. Take it on rest days too: continuity matters more than the exact moment.

Mini-schedule: combining creatine with strength training

Creatine has the most effect when it works together with structured progressive overload. The eight-week schedule below is built around compound exercises, the ideal training environment for creatine. Train three times a week on an alternating A/B structure.

Week 1 to 4: building the base (3x per week)

Start at a weight where the last two reps are heavy but technically correct:

• Day A: squat 4x8, bench press 4x8, Romanian deadlift 3x10
• Day B: deadlift 4x5, overhead press 4x8, Bulgarian split squat 3x10 per leg

Aim for 2.5 kilo progression each session on the compound movements. Take 2 to 3 minutes of rest between working sets. On rest days take your creatine portion with a meal as usual.

Week 5 to 8: progression in weight and volume

Add an extra working set per compound exercise and raise the weight by 5 percent compared to week 4. Plan a deload in week 7: 20 percent less weight, same sets and reps. In week 8 you go for a personal record on squat and bench press. With fully saturated creatine stores built up in the previous weeks, you’ll perform at your peak now.

Side effects and long-term safety

For healthy people, creatine is considered safe for long-term use. Still, there are a few points to watch, particularly in the starting phase of supplementation.

Common complaints and how to prevent them

Stomach and gut complaints occur most often during a loading phase of 20 grams per day. Solve this by spreading the dose across four portions and taking each with a meal. Also drink extra water. At a maintenance dose of 3 to 5 grams, complaints disappear on their own for most users. Water retention isn’t a side effect — it’s a normal physiological effect of creatine.

When to consult a doctor

If you have an existing kidney disease or use medication that affects kidney function, discuss creatine with your GP first. Caution is also advised during pregnancy. For healthy adults, studies up to five years have found no indications of organ damage at a daily intake of 3 to 5 grams. Consult Voedingscentrum for further information on supplement safety and recommended intake levels.

Buying creatine: quality, price and quality marks

Not all creatine on the market is the same. When buying, look at the quality mark, form and price per gram. Choose powder over capsules: for the same amount of active substance you’ll pay up to twice as much for capsules.

Creapure and other quality brands

Creapure is the best-known quality mark for creatine monohydrate, produced in Germany and tested for purity. Brands with the Creapure logo guarantee at least 99.95 percent pure creatine monohydrate. Other reliable labels are Informed Sport and NSF Certified for Sport, particularly relevant if you compete and have to face doping tests.

Comparing price per gram

A kilo of creatine powder costs an average of €15 to €30 in the Netherlands. At a daily dose of 5 grams you get 200 portions per kilo: that’s €0.07 to €0.15 per day. Always compare on price per gram, not price per tub, so you don’t overpay for packaging or marketing budget.

Creatine in practice: data from Dutch gyms

Gymsearch analysed the facilities of more than 50 gyms spread across the Netherlands, from gyms Amsterdam and gyms in Rotterdam to Eindhoven and Groningen. The conclusion is clear: creatine delivers the most in environments that actively support heavy compound training.

Which chains have the best strength area

Gyms with multiple squat racks, a dedicated deadlift platform and a spacious free-weights zone provide the best setting for creatine supplementation. Basic-Fit, SportCity and specialised strength gyms in cities like gyms in Utrecht and gyms in Den Haag regularly come out on top here.

Gym types where creatine delivers most

Creatine maximises its effect on heavy sets of one to eight reps on compound exercises. A gym with a well-equipped free-weights zone and little waiting time at the squat racks is the indispensable base. Combine the right gym with a consistent schedule and daily creatine intake, and measurable strength gains are a matter of weeks.