Highly processed is almost always synonymous with the types of food that are considered bad for your health.
From WP [0]: "he term ultra-processing refers to the processing of industrial ingredients derived from foods, for example by extruding, moulding, re-shaping, hydrogenation, and hydrolysis. Ultra-processed foods generally also include additives such as preservatives, sweeteners, sensory enhancers, colourants, flavours, and processing aids, but little or no whole food."