Is 20g of creatine a day too much?

20g a day is a real protocol, but it's a short-term one. It's the classic "loading phase" — roughly 20g/day split into 4 doses for 5-7 days to saturate muscle creatine fast. The experts treat it as optional, not necessary.

Attia, with Layne Norton, makes the core point: 5g/day reaches full muscle saturation in about four weeks on its own, so loading mainly buys you speed — at the cost of GI irritation (bloating, cramping, diarrhea) that higher single doses can cause. Patrick, with creatine researcher Dr. Darren Candow, reaches the same place on safety, debunking the common myths (kidney damage, dehydration, hair loss) and suggesting 5g to minimize GI distress.

There is a legitimate high-dose lane, but it's targeted. Attia and Patrick discuss 10-20g/day during acute high-stress periods — sleep deprivation, intense cognitive demand — to support the brain specifically. Huberman has discussed an even higher weight-based dose (0.4g/kg) studied for reducing headache, dizziness, and fatigue after traumatic brain injury. These are specific use cases, not a default.

So: 20g/day for 5-7 days is fine for healthy people; sustained 20g/day long-term is unnecessary and just adds GI risk. The standard maintenance dose is 3-5g/day of monohydrate, no cycling required. And if your bloodwork shows elevated creatinine, that's a normal artifact of supplementing creatine — ask for a cystatin C test rather than assuming kidney damage (Attia, Norton).