Help identifying culprit of brain fog in my stack, or possible negative interactions?

Had initially positive results with this stack but the effects really aren't as pronounced any more. I've been suffering from a significant amount of brain fog too. This stack may be too loaded for me to continue with, but as a learning lesson I'd appreciate any observations regarding it.

(Tianeptine - 15mg) (Magnesium Glycinate - 400mg) (Noopept - 15mg) (Aniracetam - 750mg) (Nu Nutrition Vitamin B Complex - Daily tablet) (Incite L-Theanine - 250mg) (Cod Liver Oil - 1000mg capsule)

Edit: This has been my daily stack.