---
title: "Lab Draw Prep Rules: Fasting, Coffee, Workouts, Supplements"
description: "Lab draw prep rules for fasting, coffee, workouts, and supplements. Learn what skews insulin, apoB, hs-CRP, hormones, and more."
canonical: "https://www.vitalsvault.com/blogs/lab-draw-prep-rules-fasting-coffee-workouts-supplements"
last-updated: 2026-08-22
---

# Lab Draw Prep Rules: Fasting, Coffee, Workouts, Supplements

> Lab draw prep rules for fasting, coffee, workouts, and supplements. Learn what skews insulin, apoB, hs-CRP, hormones, and more.

---

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