cat with fleas

Question
I need help the fleas are not going away with the frontline spray. I found this and was wondering if it was safe for cats, http://wolfcreekranch.net/flea_free_food_supplement.html , and if not can you recommend a good flea medicine?

Answer
I have no experience with this food supplement.  For cats with fleas, I recommend either topical Revolution or oral Comfortis for Cats.  In addition, I recommend spraying the environment with something that contains PRECOR or Methoprene to control the ability of the newly hatched flea larvae to develop.  That can last a long time where you spray it.