Amazing Grass is a familiar grocery-store greens brand — Amazing Meal blends and Organic Supergreens Powder are the kind of products that show up in general contaminant-testing datasets rather than in certification programs (Clean Label Project). It's convenient and cheap, but that's about the extent of its transparency story.
Ingredient disclosure follows typical blend-style labeling; per-ingredient clinical dosing isn't published in any source we could confirm. There's no NSF Certified for Sport, Informed Sport, or USP verification on record either.
The brand (operating as Grass Advantage) appears in Clean Label Project's third-party contaminant testing dataset, but that's inclusion in a testing panel, not a certification the brand holds (Clean Label Project).
The real issue: California's Attorney General fined the company $213,167 in a 2019 settlement after investigators found excessive lead or cadmium in Amazing Meal Chocolate Infusion and Raw Reserve Chocolate (LA Times/Daily Pilot). It's a settled, several-years-old case rather than an active one, but if you want a greens powder with a clean enforcement record, Ora Organic or Supergreen Tonik are the better picks in this category.