Protein & Nutrition Blog – Marmels
Protein & Nutrition Blog – Marmels
Ingredients to Avoid in Protein Bars: A Buyer's Guide
by Mo Mandegar, PhD
on May 16 2026
Most popular protein bars are ultra-processed by design: built around sugar alcohols, refined oils, soy protein isolate, and a stack of emulsifiers that lets the bar survive a hot warehouse. This is a practical buyer's guide to the six ingredients to avoid in protein bars, the research behind each one, and what a cleaner ingredient panel actually looks like at retail.
