Lugol's solution, which is a solution of iodine and potassium iodide, will not change color in the presence of lipids.

Here's why:

* Lugol's solution is primarily used to test for the presence of starch. It reacts with starch molecules to form a blue-black complex, thus indicating the presence of starch.

* Lipids are fats and oils. They do not react with iodine in the way starch does.

* Other methods are used to detect lipids, such as Sudan III staining which turns lipids a bright red color.

Let me know if you have any other questions!