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Proprietary Blends Explained: Why They're a Red Flag

Hormovance Comparison Team

Independent Product Research  Â·   Â·  Affiliate Disclosure

"Proprietary blend" sounds like it's protecting valuable intellectual property. In practice, it's most often protecting the manufacturer from you noticing the doses are too low to matter.

What a Proprietary Blend Actually Is

Under FDA labeling rules, a company can list a group of ingredients under a blend name and disclose only the total combined weight — not how much of each individual ingredient is inside. A "Metabolic Support Blend: 500mg" could legally be 480mg of a cheap filler like maltodextrin and 20mg split across five "active" ingredients.

Why This Matters for Effectiveness

Most of the ingredients in this category (Berberine, Green Tea Extract, Cinnamon Bark) have published research showing what dose is needed to see an effect. If a label won't tell you the individual dose, you can't check it against that research — which means you can't actually evaluate whether the product is likely to work.

The Legitimate Use Case (and Why It's Rare)

There's one legitimate reason to withhold an exact formula: protecting a genuinely novel, patented combination from being copied by competitors. In practice, the vast majority of "proprietary blends" in the metabolism-supplement category use common, widely available ingredients — Berberine, Green Tea Extract, Cinnamon — that have no real trade-secret value. The blend name is doing marketing work, not IP protection.

How to Check a Label in 30 Seconds

  • Look at the Supplement Facts panel, not the marketing copy on the front of the box
  • If every ingredient has its own milligram amount listed next to it, that's full disclosure
  • If ingredients are grouped under a blend name with only a combined total, that's a proprietary blend
  • Search the blend's total weight divided by the number of ingredients — if the ingredients are cheap fillers or if there are 8+ ingredients under a small total weight, doses are likely too low to matter

Hormovance Lists Every Individual Dose

No blend names, no hidden totals — every one of the 9 core ingredients has its exact amount disclosed on the label.

Check the Full Label →

See our complete guide to label red flags for more things worth checking before buying.

Disclaimer: This article is for informational purposes only and does not constitute medical advice. Consult a healthcare provider before starting any supplement. This page contains affiliate links.