Is this a correct sentence: "It can be more expedient to supplement the diet rather than improve it."?

Question

While there may be other issues I’m specifically interested in the use of the word "expedient". To me this sentence sounds off, can something be "more expedient" or is something always either expedient or not?

Context

I’m trying to express that sometimes when there is a lack of a certain nutrient in a persons diet the faster and easier solution in the short term to is to supplement the missing nutrient rather than spend the time finding good sources of foods the person enjoys eating.

If you have any feedback on my english or grammar in this post I’m also interested in that!