Speaking on modern Indian food, Dr. Kalia distilled the bad stuff to the "Triple Threat": (1) white rice, (2) finely-ground wheat flour, and (3) potatoes. These starchy foods are rich in easily-digested carbs and have almost no fiber or nutrients. (So you get a lot of bad without much of any good.) Bad carbs throw the body's ability to self-regulate its insulin and blood glucose levels off, which is when problems with excess body fat and related diseases begin to crop up.
Dr. Kalia's "Tripe Threat" is one of the most insightful explanations I've come across, and helps us know how we can make what we eat everyday healthier: Simply cut down or better yet replace our white rice, foods made of medha, and potatoes.