more..than has...

[iemmahu]

"This [fast-food] restaurant is close to your office, so you come here more often than has probably been good for your waistline."

I read this sentence from a book on willpower. I didn't quite understand the grammar in the underlined part and its meaning as well. Can anyone help me out? Many thanks.

[kiwi man]

NOT A TEACHER

I think the author tries to compare you eat at fast food restaurant and how it will affect your health.

[Barb_D]

To date, your trips to the restaurant occur at greater frequency (more often) than the number that would not affect your weight.

Maybe you could go one or two times a month without affecting you.
But if you go one or two times a week, it probably is making you fat.