Creatine and Surgery: Does It Work?

Creatine and Surgical Procedures

If you have upcoming surgery, understanding how creatine supplementation interacts with surgical preparation is important. While creatine itself does not pose direct surgical risks, it can complicate pre-operative blood work and kidney function assessments (RB et al., 2017) .

Why Creatine Matters Before Surgery

The Creatinine Connection

When your body metabolises creatine, it produces creatinine — a waste product filtered by the kidneys. Serum creatinine is one of the primary markers used by doctors to assess kidney function before surgery.

The problem: Creatine supplementation elevates serum creatinine levels independently of kidney function. A surgeon seeing elevated creatinine on your pre-operative blood panel may:

• Suspect kidney dysfunction
• Order additional (unnecessary) tests
• Delay your surgery
• Consult a nephrologist (kidney specialist)

All of this can be avoided by simply stopping creatine before your pre-operative blood tests.

Kidney Function Assessment

Pre-operative kidney function assessment is critical because:

• The kidneys process anaesthetic drugs and pain medications
• Adequate kidney function is needed for fluid balance during surgery
• Post-operative medications (antibiotics, pain relievers) require functioning kidneys for safe excretion

Research confirms that creatine supplementation does not actually impair kidney function in healthy individuals — it merely raises the creatinine marker (JR & M, 2000) .

Pre-Surgery Protocol

Step 1: Inform Your Surgeon

Tell your surgeon and anaesthesiologist that you take creatine supplements. This is important information for interpreting your blood work. Include creatine in your list of supplements alongside any medications.

Step 2: Stop Creatine 7-14 Days Before Surgery

• Minimum: 7 days before surgery
• Recommended: 14 days for the most accurate blood work
• Best practice: Stop before your pre-operative blood tests are drawn

Step 3: Pre-Operative Blood Work

With creatine stopped for 7-14 days, your serum creatinine should return to baseline levels, allowing accurate assessment of your kidney function.

Step 4: Surgery Day

On the day of surgery, creatine is not a concern. Follow your surgeon’s instructions regarding fasting and medication protocols.

What Happens to Your Creatine Stores

Stopping creatine for 1-2 weeks before surgery will cause a slight decline in muscle creatine stores, but this is not significant:

• After 1 week without creatine: stores decrease by approximately 10-14%
• After 2 weeks: stores decrease by approximately 20-28%
• Full depletion takes 4-6 weeks

This temporary reduction will not meaningfully impact your recovery. You can rebuild your stores quickly after surgery.

Creatine and Anaesthesia

There is no known direct interaction between creatine and anaesthetic agents. However, the concern remains indirect:

• Fluid balance: Creatine causes intracellular water retention. While this is benign, anaesthesiologists calculate fluid requirements precisely during surgery, and unexpected fluid distribution could theoretically complicate their calculations.
• Creatinine levels: As discussed, elevated creatinine can lead to misinterpretation of kidney function, affecting anaesthesia drug dosing decisions.

By stopping creatine 1-2 weeks before surgery, both concerns are eliminated.

Post-Surgery: Resuming Creatine

When to Resume

Do not resume creatine until:

1. Your surgeon clears you for normal dietary supplements
2. Post-operative blood work shows normal kidney function
3. You are adequately hydrated and eating normally
4. You are cleared for physical activity (if you plan to train)

Typical Timelines

• Minor surgery (dental, minor outpatient): Resume in 1-2 weeks
• Moderate surgery (joint repair, hernia): Resume in 2-4 weeks
• Major surgery (abdominal, cardiac): Resume in 4-8 weeks, with doctor approval

Resumption Protocol

When cleared to resume:

• Start at 3-5g per day (standard maintenance dose)
• No loading phase necessary
• Ensure adequate water intake (2-3L/day)
• Monitor for any unusual symptoms during recovery

Emergency Surgery Considerations

If you require emergency (unplanned) surgery while taking creatine:

• Inform the medical team that you supplement with creatine
• Mention the dose and duration of supplementation
• Explain that your creatinine may be elevated due to supplementation, not kidney dysfunction
• The surgical team can use alternative markers (cystatin C, BUN-to-creatinine ratio) to assess kidney function more accurately

Other Supplements to Stop Before Surgery

While discussing creatine, other supplements that should typically be stopped before surgery include:

Always provide your surgical team with a complete list of all supplements you take (J & V, 2013) .

The Bottom Line

Stop creatine supplementation 7-14 days before scheduled surgery to allow creatinine levels to normalise and ensure accurate pre-operative kidney function assessment. Inform your surgical team about your creatine use. Creatine does not pose a direct surgical risk, but elevated creatinine can lead to unnecessary delays or additional testing. Resume creatine only after receiving clearance from your surgeon and confirming normal post-operative kidney function.

Further Reading

• Is Creatine Safe?
• creatine dosage guide
• creatine for muscle building
• creatine loading phase
• creatine and water retention
• creatine research library