Question 1

Do I actually need a creatine loading phase?

Accepted Answer

No; it's optional. Loading (0.3 g/kg/day split over 4 doses for 5–7 days) saturates muscle creatine stores in about a week. Skipping it and going straight to 3–5 g/day reaches the same saturation in ~3–4 weeks. The endpoint is identical. Loading just gets you there faster, at the cost of more GI side effects.

Question 2

Why scale creatine dose by body weight?

Accepted Answer

Muscle mass scales with body weight. The 0.3 g/kg loading dose and 0.03 g/kg maintenance dose reflect what's needed to saturate and sustain total body creatine stores. Larger people need more; smaller people need less. The standard fixed doses (20 g loading, 5 g maintenance) were calibrated on ~70 kg adults; they overshoot for small people and underdose large people.

Question 3

What form of creatine should I use?

Accepted Answer

Creatine monohydrate. It's the most studied (500+ RCTs), cheapest, and alternatives (HCl, ethyl ester, buffered, nitrate) don't outperform it in head-to-head trials. Micronized monohydrate dissolves better in water but is pharmacologically identical.

Question 4

When should I take creatine?

Accepted Answer

With a carb-containing meal, ideally with some protein, post-workout on training days. The meal timing matters more than the workout timing: insulin helps drive creatine into muscle. Avoid an empty-stomach dose if you notice GI discomfort.

Question 5

Is it safe? Will it damage my kidneys?

Accepted Answer

Creatine is among the most-studied and safest dietary supplements. Long-term RCTs (up to 5 years) show no adverse effects on kidney or liver function in healthy adults. It will raise serum creatinine readings (the marker, not kidney damage); use cystatin C or eGFR from cystatin C if you need a kidney assessment while supplementing.

Question 6

What if I'm a non-responder?

Accepted Answer

About 20–30% of people are non-responders, typically because their baseline muscle creatine is already high (omnivores eating red meat regularly) or rare SLC6A8 transporter variants. Vegetarians and vegans almost always respond strongly due to lower baseline stores. If you don't see strength or body-composition effects after 8 weeks of consistent dosing, you're likely a non-responder.