In this episode of The Ingredientsage Podcast, we examine one of the most provocative questions in the supplement aisle: are some multivitamins more filler than function?

We break down the role of excipients like microcrystalline cellulose (often derived from wood pulp), magnesium stearate, silicon dioxide, and tablet binders, and why they exist in the first place.

You’ll learn how tablet compression works, why flow agents and binders are necessary for manufacturing consistency, and where the line exists between functional excipients and excessive filler. We also discuss bioavailability challenges, disintegration testing, over-compressed tablets, and how formulation shortcuts can impact absorption.

This episode is not about fear—it’s about formulation literacy. Understanding the difference between structural ingredients and active nutrients allows both consumers and brand builders to evaluate multivitamins with clarity rather than marketing emotion.

Because not all “inactive” ingredients are useless—but not all formulations are optimized either.

Because understanding ingredients is the first step toward building better wellness.