No — loading is optional. Taking 3–5g daily without loading achieves identical full muscle saturation in 28–35 days. The loading phase (0.3 g/kg for 5–7 days) simply accelerates this timeline to under a week. Loading is useful if you need rapid performance benefits (e.g., a competition in 2 weeks), but for general supplementation there is no long-term difference.

No — this is the most persistent myth in sports nutrition. Over 700 peer-reviewed studies spanning decades show no adverse kidney effects in healthy individuals at recommended doses. Creatine does elevate serum creatinine (a kidney biomarker), which can cause a false-positive on kidney function tests. Inform your physician you supplement creatine so they can interpret blood work correctly. Individuals with pre-existing kidney disease should consult their nephrologist.

Post-workout timing shows marginal benefits in some studies due to increased blood flow and insulin sensitivity after exercise. However, the total daily dose is far more important than precise timing. Taking creatine at any consistent time — morning, with a meal, or post-workout — produces functionally identical long-term saturation and performance outcomes. Consistency matters more than timing.

The human body catabolizes approximately 2g of creatine per day regardless of body mass. The 3–5g maintenance range accounts for this baseline turnover plus a margin for incomplete absorption. Studies show no additional benefit from maintenance doses above 5g — excess creatine is simply excreted in urine. The 0.04 g/kg multiplier generates the theoretical dose, but the 3–5g clamp reflects the physiological ceiling of what muscle tissue can actually retain daily.