★★★★★
I didn't have Curcumin on hand but I did have Turmeric. I feathered it onto my cat's coat and then worked it further in. Maybe a half tablespoon total.
It has now been 5 days. All spots she had are now completely covered in hair growth. She is no longer hiding from the world. I think the Tumeric did the trick.
One word of caution is that Turmeric can stain easily. You might want to cover light colored furniture if you go this route.