"The Biggest Loser" trainer Dolvett Quince isn't soft-pedaling the cause of Rob Kardashian's diabetes ... he says Rob has himself to blame.
We got Dolvett at LAX Tuesday and he made it clear ... Rob's condition is the "byproduct of bad decisions."
On the other hand, Dolvett explains how Rob and others can beat the disease.
Waiting for your permission to load the comments.