Apologies if my original comment wasn't clear. Fast-acting Lactase is something you take with every serving of dairy. The Bactose product that this post is about says the following

"Long lasting effects Bactose™ will continue to thrive digesting lactose for the whole month, individual results may vary."

I was trying to say that the Bactose product's "long-lasting" claim falls a bit flat when you realize it only lasts a month. If I could take some pills for a week and then be set for 6-months or a year, yea, I might drop $40 on it.