Short answer: a proprietary blend combines ingredients under one total weight, hiding individual amounts — a formula listing every ingredient with its own specific dose is a genuinely checkable, meaningful difference.
What a proprietary blend actually hides
When ten ingredients share one combined weight on a label, a single ingredient — even one used at a token, likely-ineffective amount — could be technically "included" while contributing little to nothing.
Why this matters for comparison shopping
- You can't compare a blended formula's per-ingredient dose to published research
- You can't tell if the ingredients most relevant to the marketing claims are actually present in meaningful amounts
- You're trusting the brand's efficacy claims without a way to independently verify them
💡 The honest standard: fully disclosed doses don't guarantee the formula works — but they make it possible for buyers, or anyone reviewing the formula, to actually evaluate that question.
How to spot the difference quickly
Check whether each ingredient on the label has its own specific milligram amount next to it, or whether several ingredients share one combined number — the latter is a proprietary blend regardless of how the label is worded.
See Harmo Brain's fully disclosed formula
Every one of 12 ingredients, individually dosed.
See the Ingredients60-day money-back guarantee