Consider this:
Your dietary pattern should be low—or moderate—in added sugar, salt, and alcohol.
The only issue is that "added" seems to apply to the entire list (to all three of the items).
So is the below a good solution? But we have to assume that "added" is only meant to apply to "sugar" and not to "salt"; is it fair to assume that? (Someone suggested to me that "added" must apply to "salt" to and that it therefore must apply to "alcohol" as well; do people speak of "added salt" and "added alcohol"?)
Your dietary pattern should be low—or moderate—in alcohol, salt, and added sugar.