Creatine on keto — does it work the same way?

Creatine absolutely still works on keto and is actually a particularly good fit. Here's why:

Creatine phosphate is used by muscles for very short-duration maximum intensity contractions (the first 10 seconds of a sprint or a heavy lift). This energy system is separate from both the glycolytic (glucose-based) and beta-oxidation (fat-based) systems. So creatine effectiveness is independent of your metabolic fuel source — ketosis or not.

Water retention: creatine does cause muscles to hold water intracellularly (inside muscle cells). This is beneficial for performance and muscle fullness. On keto you lose water from glycogen depletion — creatine partially offsets this. Scale weight may be 2-3 lbs higher with creatine use but this is muscle water, not fat, and is desirable.

Does it affect ketosis? No. Creatine has no carbohydrates and no effect on insulin signaling that would disrupt ketosis.

Continued creatine throughout my keto transition and kept my strength from dropping as badly as it might have without it. I credit it for maintaining more of my strength during the adaptation phase. The combination of keto + creatine for athletes is sensible and commonly used.

One note: the traditional "loading phase" of creatine (20g/day for 5 days) uses sugar or juice to improve absorption and is obviously not keto-compatible. Just go straight to maintenance dosing — 3-5g daily — which achieves the same result over 3-4 weeks instead. Less dramatic but keto-compatible and easier on your digestion.