Care to elaborate? What exactly do you mean by "what you need to also eat in order to absorb the necessary nutrients"?
These absorption rates can also vary widely from person to person, based on the flora in your gut, the drugs you ingest, your diet, and also certain DNA (eg. most East Asians never developed specific lactose related digestive abilities [1]) and ancestry can significantly alter this too.
For example, my grandfather had issues with high iron absorption, thus he would regularly donate blood to get rid of the excess iron in his bloodstream. Neither I nor my immediate family share that issue, but he made dietary choices based in part on avoiding iron rich food (like the iron enriched cookies I used to eat, mmm).
TL;DR: Your body & the food you eat are very complex things to understand, and we understand the tiniest sliver about it. Highly processed food likely misses important nutrients you need.
1 - https://ghr.nlm.nih.gov/condition/lactose-intolerance#statis...
Food like this that's specifically tuned to your own metabolism would be fantastic of course, but just getting some healthy stuff into you instead of whatever the vending machine sells, is already an enormous improvement for a lot of people.