Two supplements can list the same ingredients and still be very different products, depending on how the label discloses amounts.
What A Proprietary Blend Hides
A proprietary blend lists a combined total weight for a group of ingredients, without breaking out each one's individual amount. You know the ingredients are present, but not how much of each — which makes it impossible to compare against published research.
What A Fully-Dosed Label Discloses
A label like JellyBlue's states each ingredient's own milligram amount — 200mg of Tongkat Ali, 100mg of Maca Root, and so on for every active. That transparency lets you actually evaluate the formula against the research literature on each ingredient.
Why This Is Worth Checking Before You Buy
A fully-dosed label doesn't guarantee a formula works, but it does mean the company is willing to be checked. That's a meaningfully different posture than a blend that keeps amounts hidden.