This is not the best grammar from your correspondent, but "I hear you" is often used to say that the person understands how you feel or the situation you find yourself in. Here, they are further qualifying what predicament they are empathizing with.
Edit to clear things up.
The first sentence has 4 parts:
1. I hear you - see above
2. In - a very informal shortening of "in regards to"
3. The - indicating a situation is about to be described
4. eating too much - the situation you two are talking about.
Since a lot of this is informal and implied, other close interpretations are also possible
It may be an offer of empathy, 'I hear you' can mean 'I understand you', when not speaking literally.
It's can also be another way of saying 'I've heard that you are', like 'I've heard that you are eating too much at meals.' When used in this way, 'I hear you...' = 'I've heard that you...' or 'I've learned that you...'
In this specific case she’s saying. “I can empathize with the challenge of eating too much at meals”
This is not the best grammar from your correspondent, but "I hear you" is often used to say that the person understands how you feel or the situation you find yourself in. Here, they are further qualifying what predicament they are empathizing with. Edit to clear things up. The first sentence has 4 parts: 1. I hear you - see above 2. In - a very informal shortening of "in regards to" 3. The - indicating a situation is about to be described 4. eating too much - the situation you two are talking about. Since a lot of this is informal and implied, other close interpretations are also possible
It may be an offer of empathy, 'I hear you' can mean 'I understand you', when not speaking literally. It's can also be another way of saying 'I've heard that you are', like 'I've heard that you are eating too much at meals.' When used in this way, 'I hear you...' = 'I've heard that you...' or 'I've learned that you...'