Yes, it still helps, but the earlier you take it, the sooner you will get better. To be honest, expect that the symptoms worsen on day 3, but then day 4 you will feel leaps and bounds better! It definitely shortens the duration of a cold or flu! This works by helping your immune system fight! The presence of symptoms says that your immune system is fighting. Be consistent with taking it. It is worth it!

  No, I have tried it after the onset but it doesn't seem to work. Although, I think it helps reduce my symptoms. I absolutely love this product but it only works when you take it at the first sign of a cold or flu. Like a sore throat, etc. I always keep plenty on hand.

  I think Oscillo is effective any time you start taking it. I keep a lot on hand, especially during the winter months and take it at the very first sign of "anything" that seems like a suspicious symptom.

  It has helped my family. It wasn't as much as it would be if they took it on day one. It's wonderful for upset stomach too!

  It works better on first sign of symptoms but it worked sometimes even later. It does not hirt to try

  COULDN'T HURT. BEST AT ONSET OF SYMPTONS.

  There may be an expiration date on the package due to FDA regulations, but the actual shelf life is indefinite if it is properly stored.

  There is an expiration date on the box. The ones that I purchased from vitamin shoppe were well beyond 1 year after the purchase date.

  We had ours between 6 and 12 months. When we needed it after that it worked great just like it normally does. :)

  DON'T KNOW. I BUY 5 BOXES AT A TIME SO I HAVE ENOUGH FOR FAMILY AND FRIENDS.
THIS IS THE BEST PRODUCT!

  About 6 years. I bought it in Jan 2013. The exp. date on the box is Jan 2019.

  Not really sure however we used our last dose Dec. 23, 2014.

  I bought it last year and the expiration date is March 2017.

  About four years