Calculate your creatine dose by body weight for loading or daily maintenance. Most adults can skip loading and just take 3-5 g/day — saturation just takes 3-4 weeks instead of 5-7 days. Math from ISSN guidelines, not medical advice.
Your situation
5 g/day
Daily maintenance
Creatine forms — what’s worth paying for
| Form | Cost (per 5g) | vs monohydrate | Verdict |
|---|---|---|---|
| Monohydrate | ~$0.10 | baseline | Gold standard, 700+ studies, cheapest |
| Micronized monohydrate | ~$0.15 | same effect, dissolves better | Mild upgrade if you mix in water and chunks bother you |
| Creapure (German monohydrate) | ~$0.20 | same effect, higher QC purity | For purity-conscious users; same active |
| HCl (hydrochloride) | ~$0.35 | more soluble, no superior outcomes in trials | Skip unless monohydrate causes GI upset |
| Ethyl ester | ~$0.30 | LESS effective (converts to creatinine in stomach) | Avoid — Spillane 2009 trial showed inferior muscle creatine |
| Kre-Alkalyn (buffered) | ~$0.40 | no superior bioavailability vs monohydrate | Skip — Jagim 2012 head-to-head showed no benefit |
| Magnesium creatine chelate | ~$0.50 | similar to monohydrate | Skip — pay for marketing, not effect |
| Liquid creatine | ~$0.50 | WORSE — creatine degrades in solution within hours | Avoid — most liquid creatine on shelf is already creatinine |
Loading vs maintenance — does it matter?
The classic Hultman 1996 protocol used 20 g/day for 5-7 days (4 × 5g doses) to saturate muscle creatine stores in a week. Daily maintenance only (3-5 g/day) reaches the same saturation in about 3-4 weeks.
- Skip loading if: you’re starting and willing to wait 3-4 weeks for full effect; you’ve had GI distress from creatine before; you’re under 70 kg / 155 lb.
- Consider loading if: you have a strength test, athletic event, or specific timeline coming up in 2-3 weeks; you’ve tolerated creatine fine before.
- Either way: the final saturation level is identical. Loading just gets you there faster.
Timing and absorption
- Time of day doesn’t matter much. Most studies showing benefits used any-time dosing.
- With carbs/protein helps. Insulin stimulates muscle creatine uptake. Post-workout shake or breakfast is a common pairing.
- Caffeine claim is overstated. Older studies suggested caffeine blunts creatine effect; newer trials show no meaningful interference at normal caffeine doses.
- Mix in water, juice, or shake. Hot drinks can degrade creatine faster — let coffee cool first.
- Take consistently. Skipping days slowly depletes muscle creatine; consistent daily intake maintains saturation.
Side effects and contraindications
- Weight gain (1-2 kg / 2-4 lb) in the first 2-4 weeks — this is water in muscle, not fat. Plan around weight-class sports.
- GI distress (cramping, bloating) at high single doses — split loading into 4-5 doses across the day.
- Hydration. Drink normally; the “creatine causes dehydration” claim is not supported by RCT data.
- Kidney disease: consult nephrologist before starting; creatine doesn’t damage healthy kidneys but can affect lab values (raised serum creatinine reflects supplementation, not kidney damage).
- Drug interactions: nephrotoxic drugs (NSAIDs at high chronic doses, certain antibiotics) — discuss with prescriber.
- Pregnancy/breastfeeding: limited safety data; most clinicians recommend pausing.