A handful of small choices in the 24 hours before your draw can change panel values meaningfully. Here is what we ask patients to do.
The day before
- Eat normally unless your provider ordered a fasting panel (lipids, glucose, insulin).
- Limit alcohol — it shifts liver enzymes and triglycerides for up to 48 hours.
- Stay hydrated. Hydrated veins make the draw faster and reduce hemolysis.
The morning of
- If fasting: water, black coffee without cream, and prescribed medications only.
- Wear a short-sleeve top or one that rolls easily above the elbow.
- Have your photo ID and requisition handy.
After the draw
- Keep the bandage on for ~30 minutes.
- Avoid heavy lifting on that arm for a few hours.
- Bruising is normal and resolves within a few days.
