In my humble opinion, I feel that too much of something is also unhealthy. I would like to give an example with water. I'm not going to explain any food item but I will take water as an example. I have an office colleague. She drinks over 5 litres of water every day. Whether she needs or her body requries it doesnt matter. She has a rule written that she should drink a minimum of 5 bottles of water every single day.
I'm completely against drinking water this way. I drink water only when my body asks me for water. I will not drink water unnecessarily. I can even go for days without water. But when my body asks for water, I give it enough water even 4 liters in a single day but only when it asks me. This pattern of keeping it as a rule and drinking too much of water every day will also have negative effects or other consequences and can even end up unhealthy. There are many articles online that can give us details about harmful effects of drinking too much of water every day.
I also have a habit of drinking water to a certain level, but again I can feel in my body that I am drinking less water or more. So I try to keep my water intake almost same daily.
Yes that feeling. That is what I'm talking about. We have a natural thirst feeling and hunger feeling in our body. People don't respect it. Any intake to our body without respecting the hunger feeling and thirst can be harmful to our body.