Creatine and training supplements

What works

Creatine monohydrate works and is the top-tier training supplement. Israetel calls it a supplement that "really works" for muscle with cognitive upside (Dr. Mike Israetel); Cavaliere ranks creatine and protein powder as the top two muscle-building supplements (Jeff Cavaliere); the Starretts credit it with strength, power, lean muscle growth and recovery gains (The Ready State); Colenso-Semple notes that among exercise supplements with mostly minimal effects, creatine is the notable exception (Dr. Lauren Colenso-Semple); Lienhard calls it safe, affordable and effective (Judd Lienhard).

Dose about 5 grams daily, or 0.03 g per kg, taken at any time, every day, without cycling. Five grams daily is "a very good minimum dose for everybody" (Dr. Mike Israetel); Campbell anchors muscle saturation at 2 to 5 grams a day, calculated as body weight in kg times 0.03 (Dr. Bill Campbell); timing is irrelevant as long as intake is consistent (Dr. Mike Israetel, Louisa Nicola); take it daily without cycling (Jeff Cavaliere).

Creatine is an adjunct to lifting, not a substitute for it. It helps only in the context of resistance training and is not effective alone for muscle building (Dr. Lauren Colenso-Semple); its realistic effect is a few extra reps, perhaps an 11th rep where 10 were possible (Dr. Lauren Colenso-Semple, Dr. Lauren Colenso-Semple); it does not replace training for muscle retention in postmenopausal women (Dr. Lauren Colenso-Semple).

Safety at standard doses is excellent. Five grams daily for months on end has no reliable negative effects (Dr. Mike Israetel), it does not raise blood pressure in healthy people (Dr. Lauren Colenso-Semple), and no significant downsides are reported in the brain-health literature (Jeff Cavaliere). Expect roughly 2 kg of early water weight in muscle; creatine is not a weight-loss aid (Dr. Mike Israetel).

Supplements sit at the bottom of the results hierarchy. They are the least important factor next to training, nutrition, sleep and stress management (Dr. Lauren Colenso-Semple); a good diet can suffice for health, with supplements as optimisers (Jeff Cavaliere); supplementation is a long game supporting adherence, not an instant effect (Dr. Jordan Shallow); and no supplement produces extreme results quickly, whatever social media claims (Dr. Lauren Colenso-Semple).

There is no such thing as women's creatine. All creatine monohydrate is identical regardless of packaging; pink-branded "female" creatine is a marketing tactic, often overpriced with ineffective add-ins (Dr. Lauren Colenso-Semple, Dr. Lauren Colenso-Semple); the claim that women benefit more than men is a misunderstanding of the evidence (Dr. Lauren Colenso-Semple, Louisa Nicola).

Quality control matters in an unregulated industry. Athletes should prioritise NSF Certified for Sport or equivalently third-party tested products (The Ready State); creatine gummies are frequently worthless, with several leading products testing at zero creatine (Dr. Lauren Colenso-Semple, Louisa Nicola); powder should be mixed and drunk promptly because creatine degrades once left standing in liquid (Louisa Nicola).

A short evidence-based stack covers almost everyone. Israetel's top five: protein powder, creatine monohydrate, omega-3s at about 1 g combined EPA and DHA daily, vitamin D3 at 1,000 to 2,000 IU guided by blood work, and 5 to 10 g of psyllium fiber (Dr. Mike Israetel); Cavaliere independently names creatine, omega-3s and protein as the closest to non-negotiable (Jeff Cavaliere). Caffeine, magnesium and beta-alanine are situational additions, not defaults (Dr. Mike Israetel).

For specific situations

• Dieters: creatine while in a calorie deficit helps preserve lean mass and supports fat loss quality (Dr. Bill Campbell).
• Sleep-deprived, stressed, or mentally fatigued people: creatine improves short-term memory and reasoning under mental fatigue and sleep deprivation and may be neuroprotective in low-energy states (Dr. Bill Campbell, Jeff Cavaliere, The Ready State).
• Menopausal women: creatine supports lean mass retention through menopause when combined with lifting and adequate protein (The Ready State); Wright argues it is particularly worthwhile for women, who carry about 70% of male creatine stores (Dr. Vonda Wright).
• People with depression: creatine shows benefit as an add-on to conventional antidepressant treatment (Jeff Cavaliere, Louisa Nicola), but it is not an evidence-based alternative to SSRIs (Dr. Lauren Colenso-Semple).
• Sensitive stomachs: start at about 2.5 g daily and build up (Louisa Nicola); rapid 20 g loading saturates faster but commonly causes gastrointestinal distress (Dr. Mike Israetel).
• Pregnancy: current human research is insufficient to recommend creatine in pregnancy despite promising preclinical data (Louisa Nicola).
• Older adults and neurological patients: possible benefits in aging and conditions such as MS, Parkinson's and Alzheimer's are an active research area, not established practice (Dr. Bill Campbell, Jeff Cavaliere).

Open questions

• Cognitive benefits for healthy people. Campbell, Cavaliere, the Starretts and Israetel all describe cognitive upside, strongest under sleep deprivation and stress (Dr. Mike Israetel). Colenso-Semple pushes back: cognition claims rest on studies in diseased populations and do not imply benefits for healthy individuals (Dr. Lauren Colenso-Semple).
• Whether women especially need creatine. Wright frames it as critical for women given lower stores (Dr. Vonda Wright), while Colenso-Semple finds daily creatine "not especially beneficial" for women beyond an extra rep and attributes apparent sex differences to lower muscle mass (Dr. Lauren Colenso-Semple). Both agree the product itself is identical.

Cautions

• Cavaliere's mention of cycling low-dose trenbolone with TRT (Jeff Cavaliere) is an anabolic-steroid protocol, not a supplement recommendation, and sits far outside this panel's consensus. Similarly, Israetel's MK677 discussion is a research chemical review, not guidance (Dr. Mike Israetel).
• Peptides have very limited human data, unknown long-term consequences, and an unregulated marketplace (Dr. Lauren Colenso-Semple); TB-500 was discontinued over safety concerns (Louisa Nicola).
• Collagen for joints and skin has weak, inconsistent data (Dr. Lauren Colenso-Semple); taurine's human data is underwhelming (Dr. Lauren Colenso-Semple); daily ketone packets are a single fringe endorsement.
• Thermogenics raise resting metabolic rate about 8% for roughly 3 hours, driven mainly by caffeine; they are a stall-breaker at best, never a primary fat loss tool (Dr. Bill Campbell, Dr. Bill Campbell).

Putting it into practice

• Default recommendation: 5 g creatine monohydrate daily (or 0.03 g per kg), any time of day, every day, no cycling, no loading.
• Pair creatine with resistance training always; without lifting there is small reason to take it.
• Keep the core stack short: protein, creatine, omega-3 (about 1 g EPA and DHA), vitamin D3 guided by blood work, and fiber if intake is low.
• Buy third-party certified powder (NSF Certified for Sport for athletes), skip gummies and pre-mixed creatine drinks, and drink mixed powder promptly.
• For dieting clients, keep creatine running through the deficit to protect lean mass.
• For sensitive clients, start at 2.5 g and titrate up; avoid 20 g loading unless speed matters.
• Position supplements last in every client conversation: training, food, sleep and stress carry the results.

Experts in this guide: Dr. Bill Campbell, Dr. Jordan Shallow, Dr. Lauren Colenso-Semple, Dr. Mike Israetel, Dr. Vonda Wright, Jeff Cavaliere, Judd Lienhard, Louisa Nicola, The Ready State.

Before you act. Entrain is a free knowledge resource. It brings together what named doctors, scientists and coaches teach publicly, with sources, so you can explore and discuss it with your own clinician. It does not diagnose, treat or prescribe, and it is not a substitute for medical care.