How do you run a creatine experiment?

Establish a baseline using grip strength, 30-second chair stand test, or estimated 1-rep maxes on core lifts. Begin creatine monohydrate at 5g/day. Train consistently for 30 days with the same program and frequency as the baseline period. Retest the same measurements at Day 30 and Day 90. Any improvement beyond what training alone would produce is attributable to creatine.

How long before creatine works?

Initial strength and performance improvements are typically noticeable within 1–2 weeks as muscle creatine stores saturate. Lean mass changes take longer to become visible — most studies show measurable lean mass differences at 4–8 weeks. Full benefit assessment at 90 days gives the most reliable picture.

The 30-Day Creatine Experiment: N=1 Protocol

Duration (days)

Daily dose

Baseline days

Experiment question

Does creatine monohydrate at 5g/day improve my strength, muscle endurance, or body composition over 30 days compared to my pre-supplementation baseline?

Before you start — establish a baseline (Days 1–3)

Record strength markers

Choose 2–3 exercises you perform consistently. Record working weight × reps for each (e.g., 3 sets of 8 at 80kg bench press). These become your primary outcome measures.

Record morning fasted weight

3 consecutive mornings. Average these for your baseline. Expect 0.5–1.5kg increase in weeks 1–2 — this is intracellular water, not fat.

Optional: record cognitive baseline

If cognitive benefit is a priority, note your subjective morning clarity and focus on a 1–10 scale for 3 days.

Photograph or DEXA if available

Optional but useful if body composition is a primary goal.

Intervention (Days 4–33)

5g creatine monohydrate daily. Any consistent time — morning, pre-workout, or with meals. Continue your normal training protocol exactly. Do not change training volume or intensity during the experiment — this confounds the results.

View on Momentous →

Measurements during the experiment

Weekly: Same strength exercises at same weights — note whether reps or load increases.
Weekly: Morning fasted weight (expect initial 0.5–1.5kg rise that stabilizes).
Optional weekly: Cognitive clarity score (1–10, first thing in the morning).

Retest at Day 30

Repeat the exact baseline measurements. Compare to starting point across all tracked variables.

Decision rule

✓ Continue if:

Strength on ≥1 key lift increased beyond your normal variation.
Cognitive clarity is consistently higher on tracked mornings.
Recovery between sessions feels meaningfully better.

⚠ Reconsider if:

No measurable change in any tracked outcome after 30 days of consistent use.
Note: ~25% of people are creatine non-responders due to already-high baseline muscle creatine stores. This is a real phenomenon — not a product failure.

Limitations of this experiment

This is an N=1 protocol — not a controlled trial. Confounding variables (sleep quality, stress, nutrition variation, training changes) can influence results. Treat the outcome as useful personal signal, not definitive proof. A repeat cycle alternating 30 days on and 30 days off would provide stronger personal evidence if you want higher confidence.

See the full evidence review: Creatine After 40 — complete evidence →

The 30-day creatine experiment