How the loading phase works
Your muscles store creatine as phosphocreatine, and an average omnivore walks around at roughly 60–80% of the maximum they can hold. Supplementing tops them off. A loading phase does it quickly: about 0.3 g per kg of body weight per day — 20 g for a 150 lb person, capped at 24 g for bigger people — split into four doses of roughly 5 g spread through the day, for 5 to 7 days. Splitting matters: a single 20 g dose is mostly excreted and hard on the stomach, while four 5 g doses are absorbed well.
After the load, you drop to a maintenance dose of 3–5 g a day. That's the same dose you'd take if you never loaded. The only thing loading changes is how quickly you arrive.
Loading vs. no loading
| Loading | No loading | |
| Daily dose, week 1 | ~20 g (4 × 5 g) | 3–5 g |
| Time to full saturation | 5–7 days | 3–4 weeks |
| Water weight, week 1 | +2–4 lb | gradual, same total |
| Stomach upset risk | higher | low |
| Creatine used, first month | ~230 g | ~120 g |
| Maintenance after | 3–5 g/day | 3–5 g/day |
Hultman's 1996 study is the reason nobody argues about this anymore: 20 g/day for six days and 3 g/day for 28 days produced the same 20% rise in muscle creatine, and 2 g/day afterward held it there. Load if you want the strength and power benefits inside a week — before a meet, a season, or a hard training block. Skip it if you'd rather not deal with the scale jump and the extra powder.
How to spread the doses
Four roughly equal doses works best: with breakfast, with lunch, around your workout, and with dinner. Pair each with food — carbohydrate and protein raise insulin, which nudges more creatine into muscle. Dissolve the powder in warm water or a shake rather than choking down dry powder, and drink a glass of water with each dose. If you get bloating or loose stools, the gentle protocol (10 g/day for 10–14 days) reaches saturation with far fewer complaints.
What to expect
- Weight: 1–2% of body weight in the first week, as water is drawn into muscle cells. It plateaus. It is not fat, and it's part of why muscles look fuller.
- Strength: most people notice extra reps at the same weight by the end of week one or two, especially in sets of 6–12.
- Blood tests: creatinine will read higher. That's expected and not a sign of kidney trouble in healthy adults, but tell your doctor.
- Nothing? About 20–30% of people are "low responders" — usually those who already had high stores from a meat-heavy diet or lots of muscle. Vegetarians tend to respond most.
Frequently asked questions
How much creatine during loading?
About 0.3 g/kg/day, split into four doses. For most adults that's 16–24 g a day for 5–7 days.
How long is the loading phase?
5–7 days. Stores are essentially full after five days; days six and seven are a safety margin.
Do I have to load?
No. 3–5 g a day reaches the same saturation in 3–4 weeks.
Can I take 20 g at once?
You can, but a lot is excreted and it often causes stomach upset. Four 5 g doses through the day absorb better.
How much weight will I gain?
About 1–2% of body weight, 2–4 lb for most people, in water. It levels off.
Should I load again after a break?
Only if you stopped for more than 4–6 weeks, when stores have returned to baseline.