Are Clif Bars healthy or just clever marketing?
Dr. Susan Carter, MD: Endocrinologist & Longevity Expert
Nov 27, 2025 · 10 min read
For most sedentary people, a Clif Bar isn’t a “healthy” snack—it’s often a ~250‑calorie, ~20‑gram sugar glucose load that can spike insulin and blunt lipolysis (fat burning). Here’s how to read the ingredient matrix and know when a bar is functional fuel versus candy with a halo. “Most patients treat protein bars as a free ...