Where the water actually goes
A common worry is that creatine causes a bloated, puffy look from water held under the skin. The biology points the other way. Creatine is taken up into muscle cells along with water, so the fluid is drawn intracellularly, into the muscle itself, rather than into the subcutaneous space that produces a smooth, bloated appearance. The early scale weight gain on creatine is therefore largely muscle-cell hydration, not surface water.
This intracellular swelling is sometimes described as cell volumisation, and it is part of why muscles can look slightly fuller soon after starting creatine.
Reading the early weight change correctly
A typical few-pound rise in the first week or two of supplementation reflects this water shift into muscle, not fat gain and not bloat. The amount varies with dose, muscle mass, and whether a loading phase is used. Over time, any further weight change reflects training adaptation rather than the initial water uptake.
This is general educational information, not medical advice. People with kidney conditions should consult a qualified professional before using creatine.