Is creatine safe for women?

What does the research say about kidneys?

Creatine can raise serum creatinine, which can make creatinine-based kidney estimates look worse without proving kidney damage. A 2026 review found no significant difference in filtration measured with a separate tracer. An abnormal result still needs assessment. Tell your clinician about supplements; do not assume an unusual result is harmless. [5] [1]

What about pregnancy?

Human research has begun, but it is still very limited. A small 2025 conference abstract examined blood concentrations after brief dosing in late pregnancy. It did not establish routine safety, infant outcomes or benefit. Do not copy research doses during pregnancy; discuss any supplementation with your maternity clinician. [6] [2]

Can reassuring research rule out a personal side effect?

No. A review describes the outcomes reported in selected studies, and the female-specific review identified uneven adverse-event reporting. An average finding cannot diagnose an individual symptom or guarantee tolerability. If symptoms are persistent or concerning, discuss them with your GP and include the supplement, amount and timing. [1]

What about breastfeeding?

Creatine is naturally present in breast milk, but that does not establish the safety of extra supplementation. LactMed reports that milk levels after supplementation have not been measured in humans. Its advice is to avoid supplementation unless prescribed by a healthcare professional, because evidence about exposed infants is lacking. [4]

Look a little closer

What are the limits of this evidence?

Each card separates the finding from the limits. The participants, formulation and duration are part of the answer.