Ok, first of all here is the Definition of Diminished effect from Wiki. "The only purpose of the Diminished effect is to act as a reminder that an Enhancement has ended and has no other effects on the character."
I have been in the habit of using both the Metabolic and Utility Primers.
I have started using the Ascended foods, and, this evening, I played under the influence of Clove-Spiced Coq Au Vin.
I was winding down my playtime by killing such things that live in Istan, when, I noticed I had a Diminished Effect warning. My Clove-Spiced Coq Au Vin had 8 hours, 6 min, and 29 seconds left, as did my Tinned Fruitcake.
So...if I have 8 hours left why do I have a Diminished Effect warning?
The Ascended food is made to work with the Primers..right???