Proprietary blend
A group of ingredients listed together under one combined name and total weight, without disclosing how much of each individual ingredient is inside. Proprietary blends are legal, but they make it impossible to know an individual ingredient's dose from the label alone.
Example
A meaningful share of on-market products declare at least one proprietary blend -- see the full breakdown, including which compounds are most often hidden inside one, on the Proprietary Blends report.