Like training, does the body adapt to the same foods eaten day in & day out?
The logical sense would be "Yes".
I am trying an experiment with a friend that I went to college with. The candidate eats the same foods everyday & is not seeing the results that they want. It is going to be my challenge to professionally answer this question over the next couple months. I have suggested different healthy foods throughout the day & also evaluation calories in vs. calories out. After a couple months, we will reevaluate body fat %.
It has always been my philosophy that the body adapts to any stimulus that you place on it. Just like working out. If you continually do the same routine weekly-your body will plateau. It is called muscle adaptation. Most individuals wonder what is happening & why they are not seeing results. You always want to keep your body guessing!
A great example of muscle adaption is throwing a baseball. For the first time playing baseball, your shoulder is really sore for the next couple days. The more that you play baseball and mimic the throwing motion, you will become less sore in the days to follow. This is how the body works with exercise & training.
Be creative with your workouts & nutrition. Explore new healthy recipes while still understanding the foods & the nutrients that you are putting in your body!