Creatine Guide & Reviews | The Iron Verdict

Meta-analysis of 22 RCTs: creatine supplementation during resistance training significantly increased lean body mass (+1.37 kg) and 1RM strength compared to placebo.

PMID 14636102 →

Systematic Review · Lanhers et al., 2017

Creatine improves upper and lower limb muscular strength

Systematic review of 22 RCTs confirmed creatine supplementation significantly enhanced upper limb (+6.65%) and lower limb strength (+6.10%) vs placebo in resistance-trained adults.

PMID 12701815 →

RCT · Rawson & Volek, 2003

5g/day creatine is as effective as loading for long-term muscle gains

No significant difference in muscle gains between loading protocol (20g/day × 5 days) and maintenance dosing (3–5g/day) after 4 weeks. Gradual loading achieves equivalent saturation without GI side effects.

PMID 11834123 →

Review · Stares & Bains, 2020

Creatine shows neuroprotective and cognitive benefits in aging

Emerging evidence shows creatine supplementation improves cognitive performance (memory, reasoning) in older adults and may slow neurodegenerative disease progression via ATP buffering in neurons.

PMID 28615996 →

Product Recommendations

ON Micronized Creatine Monohydrate 300g

Optimum Nutrition — Pure Unflavored

Pure 5g creatine monohydrate per scoop. No fillers, no blends. Micronized for better mixability. The industry standard. ~$0.10/serving.

4.8/5 Check Price

Thorne Creatine 90 Servings

Thorne — NSF Certified for Sport

5g creatine per scoop. NSF Certified for Sport — the choice of professional athletes and military. No additives, tested for 270+ banned substances.

4.7/5 Check Price

Nutricost Creatine Monohydrate 500g

Nutricost — Best Value

5g creatine monohydrate per serving. Third-party tested, cGMP facility. Excellent value at ~$0.08/serving. 100 servings per container.

4.6/5 Check Price

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Frequently Asked Questions

How much creatine should I take daily?

The evidence-backed maintenance dose is 3–5g per day. A loading phase (20g/day split into 4×5g doses for 5–7 days) reaches muscle saturation faster but isn't necessary — daily 5g supplementation achieves full saturation in 3–4 weeks. After loading, drop to 3–5g/day. No cycling required; continuous use is safe and more effective.

When should I take creatine?

Timing is less critical than consistency. Post-workout creatine with carbohydrates + protein shows marginally superior uptake in some RCTs (insulin-driven creatine transport). Pre-workout is also effective. On rest days, take it any time. The most important factor is taking it daily without skipping — don't overthink timing.

Does creatine cause water retention?

Yes — creatine is an osmolyte that draws water into muscle cells (intracellular water, not subcutaneous). This causes an initial 0.5–2kg weight gain in the first 1–2 weeks, which is muscle hydration, not fat or subcutaneous edema. Over time, this intramuscular hydration is associated with enhanced protein synthesis. It does not cause the 'bloated' look.

Is creatine safe for long-term use?

Yes. Over 500 published studies support creatine's safety. Long-term RCTs (up to 5 years) show no adverse effects on kidney, liver, or cardiovascular function in healthy adults. The myth of kidney damage comes from case reports in people with pre-existing conditions. Healthy people at 3–5g/day have no documented safety concerns.

Which form of creatine is best — monohydrate or HCL?

Creatine monohydrate is the gold standard — it has 95%+ of the RCT data and works. HCL (hydrochloride) is more water-soluble and may reduce GI discomfort for sensitive users, but has no superiority data for muscle gains. Kre-Alkalyn, buffered, and other forms have no advantage over monohydrate. Unless you have GI issues with monohydrate, there's no reason to pay more for other forms.