It may sound like a lot of hype, but those air purifier/ionizers being sold on the Internet and eBay really do help. If you suffer from allergies - especially allergies to dust, mold, and smoke, you'll see a definite improvement. People who have used them report that they sleep without congestion, take fewer allergy pills and generally feel better. Plus the brand called NeoTec xj-2000 claims to be a serotonin reuptake inhibitor. Doctors prescribe Prozac and other medicines to fulfill this exact function.