Probably it means store-bought. One key thing about squeezing your own juice is that typically you get more fiber in your diet and fiber usually has a negative

Probably it means store-bought. One key thing about squeezing your own juice is that typically you get more fiber in your diet and fiber usually has a negative impact on cancer, which I would strongly suspect would mitigate the impact of the sugars... in addition there is a health consciousness effect where you might notice that some man or woman who is that committed to fresh-squeezing fruit juice for themselves and their kids, probably has other healthy habits that would tend to discourage cancers.