Quick answer: The ingredients are familiar botanicals and a trace mineral. Research on each is mixed and limited, and we are not aware of clinical trials on the finished product.
Chromium and Gymnema
Both are staples of blood-sugar-support formulas, but studies are mixed and often small. See Chromium Picolinate and Gymnema Sylvestre.
Green Tea, Ginseng and the rest
Popular, traditionally used botanicals with variable evidence. See Green Tea Extract and Ginseng, Eleuthero and Maca.
Things to keep in mind
The offer describes a blend of roughly 20 ingredients but names about nine and does not itemize amounts, so it is hard to judge how much of each is present. Research cited for individual ingredients does not prove an effect for the finished product, and we do not claim it treats diabetes.
Bottom line
A familiar ingredient set with limited evidence for any specific outcome. See our worth-it review and the references.