What is wrong with this sentence

[Betsy Alger]

Can you explain what is wrong with this sentence pleae?

"Especially since she eats fish and there is a lot of protein in fish."

Thank you.

 

[Tdol]

Especially refers to something that is missing- it's incomplete.

 

[emsr2d2]

Can you explain what is wrong with this sentence pleae?

"Especially since she eats fish and there is a lot of protein in fish."

Thank you.

As Tdol said, it's not a complete sentence. Here's a suggestion for a complete sentence which includes your fragment.

It is unlikely that she is lacking in protein, especially since she eats fish and there is a lot of protein in fish.