This thread discusses the Content article: NOS X9 (Precision Engineered)

Vitamin World no longer sells Precision Engineered NOS X9 - they do, however, sell Precision Engineered NOS.

There is very little to no information available on the net on NOS X9. I called Vitamin World the other day to find out whether NOS X9 was discontinued (since Precision Engineered is their own brand) - the lady I spoke to could not find any record of a NOS X9. Very strange. I expected a call back from her yesterday with some information.

I'll have to follow up with Vitamin World and keep you posted! In the meantime, I am assuming that NOS is the successor to NOS X9. (The ingredients are different, too.)

Well, I never got a call back from Vitamin World so I called them again and spoke to somebody different this time, who had to speak to her supervisor to get the information.

The official word is that NOS X9 was discontinued because it didn't sell well. Precision Engineered NOS is a best-seller though, and has been on the market for 4 years, so it is not the successor to NOS X9.

I hope this clears things up for you folks who are searching for elusive information on this product.