Creatine after 40.

The case for creatine after 40 is not that a powder can stop aging. It is that creatine may help you get more from the intervention that matters most: progressive resistance training.

What the research shows

A meta-analysis of 22 randomized trials involving 721 adults, generally 57–70 years old, found that creatine plus resistance training added an average 1.37 kilograms more lean tissue than training alone. It also produced small but significant improvements in chest-press and leg-press strength.^[1]

That pooled result matters because individual studies were mixed: some showed a clear benefit and others did not. The useful conclusion is not that everyone will respond equally, but that the combined evidence favors creatine as a modest amplifier of a well-designed training program.

Strength and lean mass

Most aging studies used resistance training two or three days per week for periods ranging from several weeks to a year. Typical supplementation was 3–5 grams daily, sometimes after a short loading phase.^[1] The supplement cannot create the training signal, but it may support greater training quality and adaptation.

Function

Functional outcomes are more variable than strength. One review found a larger improvement in sit-to-stand performance with creatine plus training, but no consistent advantage for timed up-and-go or pooled walking and balance measures.^[2] More muscle is valuable, but it does not automatically translate into every daily-life outcome.

Cognition

Brain tissue also uses the creatine-phosphocreatine energy system. A 2024 meta-analysis reported modest benefits for memory, attention time, and processing speed, while finding no significant improvement in overall cognition or executive function.^[3] Consider this a possible secondary benefit, not a promise of cognitive protection.

A practical protocol after 40

1. Start with 3 grams daily if you prefer a gradual approach or have a sensitive stomach. Five grams is also a standard studied dose.
2. Take it every day, including rest days. Link it to breakfast, a post-training meal, or another reliable routine.
3. Train progressively two or three times per week, adjusting exercise selection and loading to your ability and medical context.
4. Track outcomes that matter: repetitions or load on key movements, sit-to-stand ease, body weight, and gastrointestinal tolerance.
5. Reassess after 8–12 weeks. Creatine is worth keeping when it is tolerated, consistent, and part of a broader program you can sustain.

A loading phase is optional. If used, 20 grams per day should be divided into four 5-gram servings for 5–7 days, followed by 3–5 grams daily. Taking 3–5 grams without loading reaches similar muscle stores more gradually.^[4]

Where the evidence stops

Creatine is not an established bone-density supplement

A review of human trials found no consistent additional improvement in hip, femoral-neck, spine, or whole-body bone mineral density when creatine was added to training.^[2] A two-year randomized trial in 237 postmenopausal women likewise found no benefit for bone mineral density, falls, or fractures, although selected walking and femoral geometry measures showed improvement.^[5]

It works better with a reason to adapt

Creatine without resistance training has produced inconsistent lean-mass and function results in older adults.^[2] If training is absent, the case for using it primarily for muscle becomes weaker.