Make no mistake assuming that every healthy food is good quality food. Of course, incorporating lots of vegetables and fruits constitute a nutritious diet, but ideally, the quality continuously varies. It all dawns on how the food is grown, whether purely organically or using chemicals. The former fits the ‘good food quality’ narrative since food produced organically lacks chemicals that lower its rate. Sometimes, the water quality and weather also play a part in growing high-quality food.
Similarly, animals raised in more organic settings or are raised humanely and allowed to move around naturally produce high-quality meat. That, therefore, guarantees enough calorie content and nutrient density if you incorporate that in your diet.
On the other hand, bad food quality doesn’t have to include spoilt food but one that’s produced less organically or unnaturally. That includes using fertilizers and pesticides in the production process, which increases chemical contaminants.
However, chemically grown food isn’t always of poor quality, but the degree of using inorganic products in production determines it. Most agricultural products need pest control or nutrient bolstering at some point, but using excessive amounts would drastically lower their quality.