Everything we eat should give us the life energy to support our inner activities (as cell maintenance processes) and outer activities and not create digestions troubles. A tiger who eats meat (very fresh meat indeed!!!) will take a break sometimes for a month between his bloody meals. He is not enjoying the antelopes beefsteak 365 days a year. If you eat food from group 3 too frequently you will feel tired, sluggish, unclear, sloppy and dull.
Group 3
I do not recommend eating left overs from another day, old food, or industry processed food. I do not recommend you eat when you are angry or upset. In these two cases it is better to do physical challenges: dance, yoga, and sauna. If you are one of the group 3 fans this life strategy will not give you anything apart from a shortcut to the cemetery and a bunch of illnesses. How much to eat? The older you are growing (if you are still growing at all) the less you should eat. Your activity level is diminishing with age, your muscles are not the same, and you do not need to dig a tunnel every day. Your metabolic processes (or speed of life circulating body processes) will start to slow down with ages. It is natural. That is why you need to use the adaptation law, do not load your stomach with the same amount as 20-year old athletes are doing.