@SMickey,
The sentence is errorless.
You're right about
uncountable nouns, generally speaking.
The word "love" can be countable, however. It can refer to a couple's emotional relationship. "A love like ours"
You can speak of the word "sky" figuratively:
"Big Sky Country" Montana has a big sky.
You can also speak of extraterrestrial skies, like Mars'. Mars has a sky.
"Fresh fruit" can be countable. One can say, "here is a fresh fruit," referring to a fresh apple one in holding in one's hand, for example.
"An apple" is countable. It refers to one apple.
There are three tangible and observable energy providing nutrients: proteins, fats and carbohydrates. If I'm speaking about fats, I'm speaking about a nutrient.
The word "nutrition" is uncountable, however, and may be what you're thinking about.